Axel Larsson AL 79-045U Operating and maintenance manual

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MANUAL
Actuator AL 79-045U to AL 79-801U
Installation, maintenance and operating instruction manual
for 4th generation upgrade series actuators.
- AL 79-045U to AL 79-801U
- Double acting “D” and spring return “S”
- 90° to 180° stroke
Contents
1) GENERAL
2) WARNING
3) WORKING CONDITIONS AND TECHNICAL DATA
4) OPERATING FUNCTION AND DIRECTION OF ROTATION
5) INSTALLATION INSTRUCTIONS
6) MAINTENANCE INSTRUCTIONS
7) STORAGE INSTRUCTIONS
8) LIFTING AND HANDLING
1. General
This instruction manual contains important information regarding the
installation, operation, maintenance and storage for AL 79 rack and
pinion pneumatic actuators. Please read these instructions carefully
and keep them for future reference. It is important that the use and
maintenance of the actuator is made only by properly trained person-
nel.
2. Warning
• Do not operate the actuator using inammable, oxidizing, corrosive,
explosive or unstable gases or liquids (use only not dangerous uids
– group 2 according to 97/26/EC directive). Moreover, for actuators
installed in potentially explosive zones, make sure that the internal
parts of the actuator do not come into contact with the external
atmosphere.
• Referring to the Machinery Directive 2006/46/EC, the actuators
can be classied as “PARTLY COMPLETED MACHINERY” (see the
DECLARATION OF INCORPORATION).Therefore the actuator can
not put into service until the machinery and/or the system, where
the actuator is incorporated, will be declared in compliance with the
requirements of the Directive 2006/42/EC.
• AL 79 actuators are designed, produced and classied according to
the ATEX Directive 94/9/EC (see actuator label and safety instruc-
tions).The use of the actuators in potential explosive atmosphere
zones has to comply with the ATEX classication indicated on the
actuator label and according to the ATEX safety instructions.
• The use, the installation and the maintenance of theAL 79 actuators
must be made by adequately trained personnel. For the use, instal-
lation and maintenance of AL 79 actuators it is recommended to
comply to the safety notice and to useproper equipment toprotect
health and prevent accidents.
• It is important that the actuator is used only within the working
limits indicated in the technical specications.
• Do not operate the actuator over temperature limits: this could da-
mage internal and external components (disassembly of spring return
actuator may become dangerous).
• Do not operate the actuator over pressure limits: this could damage
internal parts as well as cause damage to the housing and end-caps.
• Do not use the actuator in corrosive environments with incorrect
protection: this could damage the internal and external parts.
• Do not disassemble individual spring cartridges, this may result in
personal injury. If maintenance to springs is necessary, send them to
Axel Larsson.
• Close and disconnect all air supply lines and make sure that air con-
nections are vented during maintenance and installation on valve.
• Do not disassemble the actuator or remove end caps while the
actuator is pressurized.
• The 4th GENERATION Upgrade Series actuators are designed to
be used only on valves.
• Before installing the actuator onto the valve make sure that the ro-
tation direction and the position indicator are in the correct position.
• If the actuator is incorporated in a system or used within safety
devices or circuits, the customer shall ensure that the national and
local safety laws and regulations are observed.

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MANUAL
Actuator AL 79-045U to AL 79-801U
3. Working conditions and technical data
• Operating media:
Dry or lubricated air or inert gases, provided that they are compatible with the actuator internal parts and lubricant.The operating media must
have a dew point equal to –20°C (-4°F) or at least 10°C below the ambient temperature.The maximum particle size contained into the opera-
ting media must not exceed 30 m.
• Supply pressure:
The maximum supply pressure is 8 bar (116 Psi), only for AL 79-801 it is 7 bar (101,5 Psi).
For double acting and spring return actuators the working pressure is from 2.5 bar (36 Psi) to 8 bar (116 Psi).
• Operating temperature:
“Standard” actuators from -40°C (-40°F) to +80°C (+176°F)
Actuators for high temperature “HT” from -15°C (+5°F) to +150°C (+300°F)
Actuators for extreme low temperature “LLT” from -55°C (-67°F) to + 80°C (+176°F)
Caution: for low and high temperature service, special grease and special components are required. Please contact Axel Larsson.Working at high
or low temperature can affect the life and the output torque of the actuator.
• Operating time (see technical data sheet):
Caution: the operating time depends on several factors such as supply pressure, supply system capacity (pipe diameter, ow capacity of pneu-
matic accessories), valve type, valve torque and gures, applied safety factor, cycle frequency, temperature, etc.
• Rotation and stroke adjustment (see technical data sheet):
For standard actuators (90° rotation), 120° actuators (120° rotation), 135° actuators (135° rotation) and 180° actuators (180° rotation).
Stroke adjustment at 0°(closed pistons): +15°max/ - 5°. Stroke adjustment at 90°, 120°, 135° and 180°(open pistons): +5°/-15°max. For actuator
AL 79-045U the stroke adjustment at 90° (open pistons) is available only on request.
• Lubrication:
The actuators are factory lubricated for the life of the actuator in normal working conditions.
The standard lubricant type GSTD is suitable for use from -40°C (-40°F) to +80°C (+176°F).
For extreme low temperature (LLT) and high temperature (HT) service, special grease is required: please contact Axel Larsson.
• Construction:
Rack and pinion actuator design suitable for both indoor or outdoor installations.
• Protection and corrosion resistance:
All the actuators are supplied with corrosion protection for normal environments. For corrosion resistance of the different types of protection
see technical data sheet. Before installing the actuator in aggressive environment, ensure that the selected protection level is suitable.
• Actuator designation and marking (see technical data sheets):
The actuator type, size, operating pressure, output torque, direction of rotation, spring action, operating temperature and type of connections
interfaces are determined by designation.All AL 79 actuators are supplied with an identication label showing the serial number and all neces-
sary information on use, service, operation and product designation.Where applicable, the label indicates the classication according to ATEX
Directive 94/9/ EC.

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MANUAL
Actuator AL 79-045U to AL 79-801U
4. Operating function and direction of
rotation
The actuator is a pneumatic device for remote operation of industrial
valves.The operation (90°,120°,135° or 180° rotation) may be activa-
ted by different methods:
• Direct mounting of solenoid valve (5/2 for double acting, 3/2 for
spring return) to pressure connections 2 and 4, connected to supply
and control lines.
• Screwed connection (to pressure connections 2 and 4) with air lines
from separate control cabinet.
The standard rotation (when port 4 is pressurized or for spring
action) is clockwise to close.When port 2 is pressurized, counter-
clockwise rotation is obtained.
AL 79 actuators can be supplied with different types of assembly/ro-
tation direction depending on the type of required operation and/or
installation, see technical data sheets.
• Actuator designation and marking (see technical data
sheets):
The actuator type, size, operating pressure, output
torque, direction of rotation, spring action, operating
temperature and type of connections/interfaces are
determined by designation.
• All AIR TORQUE actuators are supplied with an identifi-
cation label showing the serial number and all necessary
information on use, service, operation and product
designation. Where applicable, the label indicates the
classification according to ATEX Directive 94/9/EC.
4) OPERATING FUNCTION AND DIRECTION OF
ROTATION
The actuator is a pneumatic device for remote opera-
tion of industrial valves. The operation (90°,120°,135° or
180° rotation) may be activated by different methods:
• Direct mounting of solenoid valve (5/2 for double acting,
3/2 for spring return) to pressure connections 2 and 4,
connected to supply and control lines.
• Screwed connection (to pressure connections 2 and 4)
with air lines from separate control cabinet.
The standard rotation (when port 4 is pressurized or
for spring action) is clockwise to close. When port 2 is
pressurized, counter-clockwise rotation is obtained.
Air Torque actuators can be supplied with different types
of assembly/rotation direction depending on the type of
required operation and/or installation, see technical data
sheets.
5) ACTUATOR INSTALLATION INSTRUCTIONS
The Air Torque actuator is a pneumatic device for the remote
operation of industrial valves. The actuator will operate through
90°,120°,135° and 180° rotation permitting the opening and
closing of many types of valves up to 180° rotation.
All the necessary technical information to install the actuator
correctly and safely onto a valve i.e.:
Dimensions, Output torque, Supply pressure, Air volume,
Stroke adjustment, Operating time, Operating temperature,
Direction of rotation and Weight is stated clearly on the
Actuator label, in the catalogue and technical data sheets.
Please read all technical information before proceeding with
the actuator installation.
5.1) Important safety notice!
• For safety reasons, the actuator must not be pressurized
at any time during installation as injury may result.
• The utmost cleanliness is required during air supply
connection to the actuator i.e. the connecting pipe
thread, fittings and seals must be clean and dirt-free.
• When fitting accessories onto the actuators, assemble
them in such a way that the emergency control of the
solenoid valve and the top of the drive shaft are easily
accessible, should emergency manual operations be required.
• Before fitting onto the valve, make sure that the actuator/
valve are correctly orientated, depending upon which
direction of rotation is required.
• For spring return actuators, avoid that dangerous and/or
corrosive substances in the working environment enter
into the external chambers by using adequate filters
and/or solenoid valves.
IMAT 4thGU-E
4
GB
DOUBLE ACTING OPERATION FUNCTION
(STANDARD ROTATION TYPE “ST”) TOP VIEW
Air supplied to port 2 forces the pistons towards the actuator end caps.
A counter-clockwise rotation is achieved.
Exhaust air exits from Port 4.
Air supplied to Port 4 forces the pistons inward.
A clockwise rotation is achieved.
Exhaust air exits from Port 2.
SINGLE ACTING OPERATION FUNCTION
(STANDARD ROTATION TYPE “ST”) TOP VIEW
Air supplied to Port “2” forces the pistons toward the actuator end caps,
compressing the springs.
A counter-clockwise rotation is achieved. Exhaust air exits from Port 4.
The loss of air pressure (air or electric failure) at Port “2” allows the springs
to force the pistons inward.
A clockwise rotation is achieved.
Exhaust air exits from Port 2.
• Actuator designation and marking (see technical data
sheets):
The actuator type, size, operating pressure, output
torque, direction of rotation, spring action, operating
temperature and type of connections/interfaces are
determined by designation.
• All AIR TORQUE actuators are supplied with an identifi-
cation label showing the serial number and all necessary
information on use, service, operation and product
designation. Where applicable, the label indicates the
classification according to ATEX Directive 94/9/EC.
4) OPERATING FUNCTION AND DIRECTION OF
ROTATION
The actuator is a pneumatic device for remote opera-
tion of industrial valves. The operation (90°,120°,135° or
180° rotation) may be activated by different methods:
• Direct mounting of solenoid valve (5/2 for double acting,
3/2 for spring return) to pressure connections 2 and 4,
connected to supply and control lines.
• Screwed connection (to pressure connections 2 and 4)
with air lines from separate control cabinet.
The standard rotation (when port 4 is pressurized or
for spring action) is clockwise to close. When port 2 is
pressurized, counter-clockwise rotation is obtained.
Air Torque actuators can be supplied with different types
of assembly/rotation direction depending on the type of
required operation and/or installation, see technical data
sheets.
5) ACTUATOR INSTALLATION INSTRUCTIONS
The Air Torque actuator is a pneumatic device for the remote
operation of industrial valves. The actuator will operate through
90°,120°,135° and 180° rotation permitting the opening and
closing of many types of valves up to 180° rotation.
All the necessary technical information to install the actuator
correctly and safely onto a valve i.e.:
Dimensions, Output torque, Supply pressure, Air volume,
Stroke adjustment, Operating time, Operating temperature,
Direction of rotation and Weight is stated clearly on the
Actuator label, in the catalogue and technical data sheets.
Please read all technical information before proceeding with
the actuator installation.
5.1) Important safety notice!
• For safety reasons, the actuator must not be pressurized
at any time during installation as injury may result.
• The utmost cleanliness is required during air supply
connection to the actuator i.e. the connecting pipe
thread, fittings and seals must be clean and dirt-free.
• When fitting accessories onto the actuators, assemble
them in such a way that the emergency control of the
solenoid valve and the top of the drive shaft are easily
accessible, should emergency manual operations be required.
• Before fitting onto the valve, make sure that the actuator/
valve are correctly orientated, depending upon which
direction of rotation is required.
• For spring return actuators, avoid that dangerous and/or
corrosive substances in the working environment enter
into the external chambers by using adequate filters
and/or solenoid valves.
IMAT 4thGU-E
4
GB
DOUBLE ACTING OPERATION FUNCTION
(STANDARD ROTATION TYPE “ST”) TOP VIEW
Air supplied to port 2 forces the pistons towards the actuator end caps.
A counter-clockwise rotation is achieved.
Exhaust air exits from Port 4.
Air supplied to Port 4 forces the pistons inward.
A clockwise rotation is achieved.
Exhaust air exits from Port 2.
SINGLE ACTING OPERATION FUNCTION
(STANDARD ROTATION TYPE “ST”) TOP VIEW
Air supplied to Port “2” forces the pistons toward the actuator end caps,
compressing the springs.
A counter-clockwise rotation is achieved. Exhaust air exits from Port 4.
The loss of air pressure (air or electric failure) at Port “2” allows the springs
to force the pistons inward.
A clockwise rotation is achieved.
Exhaust air exits from Port 2.
5.Actuator installation instructions
The AL 79 actuator is a pneumatic device for the remote operation of
industrial valves.The actuator will operate through 90°,120°,135° and 180°
rotation permitting the opening and closing of many types of valves up to
180° rotation.All the necessary technical information to install the actuator
correctly and safely onto a valve i.e.: Dimensions, Output torque, Supply pres-
sure,Air volume, Stroke adjustment, Operating time, Operating temperature,
Direction of rotation and weight is stated clearly on the actuator label, in
the catalogue and technical data sheets. Please read all technical information
before proceeding with the actuator installation.
5.1) Important safety notice!
• For safety reasons, the actuator must not be pressurized at any time during
installation as injury may result.
• The utmost cleanliness is required during air supply connection to the
actuator i.e. the connecting pipe thread, ttings and seals must be clean and
dirt-free.
• When tting accessories onto the actuators, assemble them in such a way
that the emergency control of the solenoid valve and the top of the drive shaft
are easily accessible, should emergency manual operations be required.
• Before tting onto the valve, make sure that the actuator/valve are correctly
orientated, depending upon which direction of rotation is required.
• For spring return actuators, avoid that dangerous and/or corrosive substan-
ces in the working environment enter into the external chambers by using
adequate lters and/or solenoid valves.
• Remove plugs from actuator air connections during installation and opera-
tion. Protect the air connections of actuators not being used immediately.

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MANUAL
Actuator AL 79-045U to AL 79-801U
Tightening torque table:
→
→
M.. Nm
M5 5 6
M6 10 11
M8 23 25
M10 48 52
M12 82 86
M14 132 138
M16 200 210
M20 390 410
M24 675 705
M30 1340 1400
→
→
→
→
→
→
→
→
5
• Remove plugs from actuator air connections during
installation and operation. Protect the air connections of
actuators not being used immediately.
5.2) Interfaces for actuator control and connections, figure A:
5.3) Assembly of accessories: solenoid valves and
switchboxes, figure B:
• Solenoid valve mounting:
Before mounting a solenoid valve, ensure that the
actuator is in its normal position (closed position) with
pistons inwards.
For standard rotation type “ST” (clockwise to close)
assembly: the groove on the drive shaft or on the position
indicator 2 must be horizontal to the longitudinal axis of
the actuator in closed position.
Fit the solenoid valve 4 onto the actuator 3 using the
provided screws (max. tightening torque see table).
• Switchbox mounting:
Fit the switchbox and bracket 1 onto the actuator 3 using
four provided screws (max. tightening torque see table).
5.4) Assembly of valve figure C:
Before proceeding with the assembly of the actuator onto
the valve, be sure that the actuator operates in the desired
direction of rotation when pressurised and both actuator/
valve are in the correct position.
Important: when using a spring return actuator for a fail
safe operation, ensure that when air or electricity failure
occurs the direction of rotation is correct for your application.
Fit the actuator 3 onto the valve 5. It is possible to assemble
the valve onto the actuator in two ways:
• Direct-mount: fit the stem of the valve 5 directly into the
female connection of the actuator 3 and bolt together
through the valve ISO pad (max. tightening torque see table).
• Bracket-mount: mounting with a bracket 6 and coupling
7, the bracket is bolted to the actuator / valve to join
them together and the coupling is used to connect the
actuator output drive to the valve stem (max. tightening
torque see table).
6) MAINTENANCE INSTRUCTION
With the information given below, AIR TORQUE provides
the end user with all the required information necessary
for maintenance. Under normal conditions, the actuator
requires only periodic observation to ensure proper operation.
Maintenance (disassembly, maintenance and rebuilding)
of AIR TORQUE actuators is allowed only to AIR TORQUE
personnel or properly instructed personnel. In case of
controversy the product guarantee will expire!
Spare kits for maintenace are available to replace all
seals and bearings (soft parts indicated into the table),
that may be necessary between 300.000 and 1.000.000
cycles depending on operating and environmental
conditions and actuator size.
IMAT 4thGU-E GB
Fig. A
Fig. B
Fig. C
5.2) Interfaces for actuator control and connections, gure A:
Tightening torque:
M5 05g06
M6 10g11
M8 23g25
M10 48g52
M12 82g86
M14 132g138
M16 200g210
M20 390g410
M24 675g705
M30 1340g1400
Tightening torque table:
→
→
M.. Nm
M5 5 6
M6 10 11
M8 23 25
M10 48 52
M12 82 86
M14 132 138
M16 200 210
M20 390 410
M24 675 705
M30 1340 1400
→
→
→
→
→
→
→
→
5
• Remove plugs from actuator air connections during
installation and operation. Protect the air connections of
actuators not being used immediately.
5.2) Interfaces for actuator control and connections, figure A:
5.3) Assembly of accessories: solenoid valves and
switchboxes, figure B:
• Solenoid valve mounting:
Before mounting a solenoid valve, ensure that the
actuator is in its normal position (closed position) with
pistons inwards.
For standard rotation type “ST” (clockwise to close)
assembly: the groove on the drive shaft or on the position
indicator 2 must be horizontal to the longitudinal axis of
the actuator in closed position.
Fit the solenoid valve 4 onto the actuator 3 using the
provided screws (max. tightening torque see table).
• Switchbox mounting:
Fit the switchbox and bracket 1 onto the actuator 3 using
four provided screws (max. tightening torque see table).
5.4) Assembly of valve figure C:
Before proceeding with the assembly of the actuator onto
the valve, be sure that the actuator operates in the desired
direction of rotation when pressurised and both actuator/
valve are in the correct position.
Important: when using a spring return actuator for a fail
safe operation, ensure that when air or electricity failure
occurs the direction of rotation is correct for your application.
Fit the actuator 3 onto the valve 5. It is possible to assemble
the valve onto the actuator in two ways:
• Direct-mount: fit the stem of the valve 5 directly into the
female connection of the actuator 3 and bolt together
through the valve ISO pad (max. tightening torque see table).
• Bracket-mount: mounting with a bracket 6 and coupling
7, the bracket is bolted to the actuator / valve to join
them together and the coupling is used to connect the
actuator output drive to the valve stem (max. tightening
torque see table).
6) MAINTENANCE INSTRUCTION
With the information given below, AIR TORQUE provides
the end user with all the required information necessary
for maintenance. Under normal conditions, the actuator
requires only periodic observation to ensure proper operation.
Maintenance (disassembly, maintenance and rebuilding)
of AIR TORQUE actuators is allowed only to AIR TORQUE
personnel or properly instructed personnel. In case of
controversy the product guarantee will expire!
Spare kits for maintenace are available to replace all
seals and bearings (soft parts indicated into the table),
that may be necessary between 300.000 and 1.000.000
cycles depending on operating and environmental
conditions and actuator size.
IMAT 4thGU-E GB
Fig. A
Fig. B
Fig. C
5.3) Assembly of accessories: solenoid valves and
switchboxes, gure B:
Tightening torque table:
→
→
M.. Nm
M5 5 6
M6 10 11
M8 23 25
M10 48 52
M12 82 86
M14 132 138
M16 200 210
M20 390 410
M24 675 705
M30 1340 1400
→
→
→
→
→
→
→
→
5
• Remove plugs from actuator air connections during
installation and operation. Protect the air connections of
actuators not being used immediately.
5.2) Interfaces for actuator control and connections, figure A:
5.3) Assembly of accessories: solenoid valves and
switchboxes, figure B:
• Solenoid valve mounting:
Before mounting a solenoid valve, ensure that the
actuator is in its normal position (closed position) with
pistons inwards.
For standard rotation type “ST” (clockwise to close)
assembly: the groove on the drive shaft or on the position
indicator 2 must be horizontal to the longitudinal axis of
the actuator in closed position.
Fit the solenoid valve 4 onto the actuator 3 using the
provided screws (max. tightening torque see table).
• Switchbox mounting:
Fit the switchbox and bracket 1 onto the actuator 3 using
four provided screws (max. tightening torque see table).
5.4) Assembly of valve figure C:
Before proceeding with the assembly of the actuator onto
the valve, be sure that the actuator operates in the desired
direction of rotation when pressurised and both actuator/
valve are in the correct position.
Important: when using a spring return actuator for a fail
safe operation, ensure that when air or electricity failure
occurs the direction of rotation is correct for your application.
Fit the actuator 3 onto the valve 5. It is possible to assemble
the valve onto the actuator in two ways:
• Direct-mount: fit the stem of the valve 5 directly into the
female connection of the actuator 3 and bolt together
through the valve ISO pad (max. tightening torque see table).
• Bracket-mount: mounting with a bracket 6 and coupling
7, the bracket is bolted to the actuator / valve to join
them together and the coupling is used to connect the
actuator output drive to the valve stem (max. tightening
torque see table).
6) MAINTENANCE INSTRUCTION
With the information given below, AIR TORQUE provides
the end user with all the required information necessary
for maintenance. Under normal conditions, the actuator
requires only periodic observation to ensure proper operation.
Maintenance (disassembly, maintenance and rebuilding)
of AIR TORQUE actuators is allowed only to AIR TORQUE
personnel or properly instructed personnel. In case of
controversy the product guarantee will expire!
Spare kits for maintenace are available to replace all
seals and bearings (soft parts indicated into the table),
that may be necessary between 300.000 and 1.000.000
cycles depending on operating and environmental
conditions and actuator size.
IMAT 4thGU-E GB
Fig. A
Fig. B
Fig. C
• Solenoid valve mounting:
Before mounting a solenoid valve, ensure that the actuator is in its
normal position (closed position) with pistons inwards.
For standard rotation type “ST” (clockwise to close) assembly: the
groove on the drive shaft or on the position indicator 2 must be hori-
zontal to the longitudinal axis of the actuator in closed position.
Fit the solenoid valve 4 onto the actuator 3 using the provided
screws (max. tightening torque see table).
• Switchbox mounting:
Fit the switchbox and bracket 1 onto the actuator 3 using four provi-
ded screws (max. tightening torque see table).
5.4) Assembly of valve gure C:
Before proceeding with the assembly of the actuator onto the valve,
be sure that the actuator operates in the desired direction of rotation
when pressurised and both actuator / valve are in the correct posi-
tion.
Important:
When using a spring return actuator for a fail safe operation, ensure
that when air or electricity failure occurs the direction of rotation is
correct for your application. Fit the actuator 3 onto the valve 5. It is
possible to assemble the valve onto the actuator in two ways:
• Direct-mount:
Fit the stem of the valve 5 directly into the female connection of the
actuator 3 and bolt together through the valve ISO pad (max. tighte-
ning torque see table).
• Bracket-mount:
Mounting with a bracket 6 and coupling 7, the bracket is bolted to
the actuator / valve to join them together and the coupling is used to
connect the actuator output drive to the valve stem (max. tightening
torque see table).

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MANUAL
Actuator AL 79-045U to AL 79-801U
6. Maintenance instruction
With the information given below,Axel Larsson provides the end user with all the required information necessary for maintenance. Under
normal conditions, the actuator requires only periodic observation to ensure proper operation. Maintenance (disassembly, maintenance and
rebuilding) of Axel Larsson actuators is allowed only to Axel Larsson personnel or properly instructed personnel. In case of controversy the
product guarantee will expire! Spare kits for maintenace are available to replace all seals and bearings (soft parts indicated into the table), that
may be necessary between 300.000 and 1.000.000 cycles depending on operating and environmental conditions and actuator size.
6.1 Drawing with itemized components and recommended spare parts
IMAT 4thGU-E
GB
6.1) DRAWING WITH ITEMIZED COMPONENTS AND RECOMMENDED SPARE PARTS
6
Model Ex1 mm Ex2 mm d mm
AT045U / 8 13
AT051U 10 8 14
AT101U 10 10 16
AT201U 13 10 22
AT251U 13 10 25
AT301U 17 13 26
AT351U 19 13 36
AT401U 19 17 38
AT451U 22 17 45
AT501U 22 19 48
AT551U 24 19 52
AT601U 30 22 58
AT651U 30 24 68
AT701U 36 22 80
AT751U 46 24 85
AT801U 46 24 90
60.1
IMAT 4thGU-E
GB
6.1) DRAWING WITH ITEMIZED COMPONENTS AND RECOMMENDED SPARE PARTS
6
Model Ex1 mm Ex2 mm d mm
AT045U / 8 13
AT051U 10 8 14
AT101U 10 10 16
AT201U 13 10 22
AT251U 13 10 25
AT301U 17 13 26
AT351U 19 13 36
AT401U 19 17 38
AT451U 22 17 45
AT501U 22 19 48
AT551U 24 19 52
AT601U 30 22 58
AT651U 30 24 68
AT701U 36 22 80
AT751U 46 24 85
AT801U 46 24 90
60.1
Model EX1 mm EX2 mm Ø mm
AL 79-045U - 8 13
AL 79-051U 10 8 14
AL 79-101U 10 10 16
AL 79-201U 13 10 22
AL 79-251U 13 10 25
AL 79-301U 17 13 26
AL 79-351U 19 13 36
AL 79-401U 19 17 38
AL 79-451U 22 17 45
AL 79-501U 22 19 48
AL 79-551U 24 19 52
AL 79-601U 30 22 58
AL 79-651U 30 24 68
AL 79-701U 36 22 80
AL 79-751U 46 24 85
AL 79-801U 46 24 90
IMAT 4thGU-E
GB
6.1) DRAWING WITH ITEMIZED COMPONENTS AND RECOMMENDED SPARE PARTS
6
Model Ex1 mm Ex2 mm d mm
AT045U / 8 13
AT051U 10 8 14
AT101U 10 10 16
AT201U 13 10 22
AT251U 13 10 25
AT301U 17 13 26
AT351U 19 13 36
AT401U 19 17 38
AT451U 22 17 45
AT501U 22 19 48
AT551U 24 19 52
AT601U 30 22 58
AT651U 30 24 68
AT701U 36 22 80
AT751U 46 24 85
AT801U 46 24 90
60.1

5.612B_UK - 6
Ref. 5.612B_UK - 2021-03-01. www.axel-larsson.se
MANUAL
Actuator AL 79-045U to AL 79-801U
Pos Qty Note Part description
01 1 Not available for AL 79-045U Octi-cam (stop arrangement)
02 2 Not available for AL 79-045U Stop cap screw
03 2 Not available for AL 79-045U Washer
04 2 Not available for AL 79-045U Nut (stop screw)
05* 2 Bearing (piston back)
06* 1 Bearing (pinion top)
07* 1 Bearing (pinion bottom)
08* 2 1 pcs. for model AL 79-045U Thrust bearing (pinion)
09* 2 Not available for AL 79-801U Plug
09.1* 2 O ring (for AT801U)
10 1 Thrust washer (pinion)
11* 2 Not available for AL 79-045U "O " ring (stop screw)
12 2 Not available for AL 79-045U Piston guide
13 8/12 /16 (A) Cap screw (end cap)
14* 2 "O " ring (end cap)
15* 2 Bearing (piston head)
16* 2 "O " ring (piston)
17 min 5 / max 12 for AL 79-101U - AL 79-801U Spring (cartridge)
17.1 max 2 Not available for AL 79-101U - AL 79-801U Spring (for AL 79-045U - AL 79-051U)
17.2 max 2 Not available for AL 79-101U - AL 79-801U Spring (for AL 79-045U - AL 79-051U)
17.3 max 2 Not available for AL 79-101U - AL 79-801U Spring (for AL 79-045U - AL 79-051U)
18 1 Spring clip (pinion)
19 1 Not available for AL 79-045U Position indicator (for AL 79-051U - AL 79-101U)
19.0 1 Graduated ring
19.1 1 Not available for AL 79-051U - AL 79-101U Position indicator
19.5 1 Not available for AL 79-051U - AL 79-101U Top adaptor
19.6 2 Not available for AL 79-051U - AL 79-101U Hex. socket screw (top adaptor)
20* 1 "O" ring (pinion bottom)
21* 1 "O" ring (pinion top)
30 2 End cap
39 1 Cap screw (indicator)
40 2 Piston
41 1 Actuator identication label
42 2 End cap label
43 1 Spigot (only on request)
50 1 Body
60 1 Drive shaft
60.1 1 Integral drive shaft
65 1 Plastic insert
* Included in repair kit for maintenance
(A) 12 pcs. for models AL 79-701U / AL 79-751U, 16 pcs. for models AL 79-801U

5.612B_UK - 7
Ref. 5.612B_UK - 2021-03-01. www.axel-larsson.se
MANUAL
Actuator AL 79-045U to AL 79-801U
6.2) Disassembly
When disassembly of actuator is required for maintenance, rstly
remove the actuator from the valve. Before performing any disassem-
bly operations it is important to verify that the actuator is not pres-
surised.Always use caution and double check that the ports 2 and 4
are vented and are free from any accessory and/or device.When the
actuator is a spring return unit, make sure that the actuator is in the
failed position and with pistons completely inwards before disassem-
bling.
A) Removal of position indicator and graduated ring
(Part N° 19,19.0,19.1), gure 01:
• Remove cap screw (39) if tted.
• Lift position indicator (19 or 19.1) off shaft, it may be necessary to
pry gently with a screwdriver.
• Lift, if necessary, the graduated ring (19.0) off the body, it may be
necessary to pry gently with a screwdriver.
B) Removal of stop cap screws (Part N° 02), gure 02:
• Remove both stop cap screws together with nut (04) and washer
(03).
• Remove stop screw o-rings (11) and discard if replacing all soft
parts.
Fig. 05
Fig. 04
IMAT 4thGU-E
8
GB
Fig. 03
Fig. 01
Fig. 02
6.2) DISASSEMBLY
When disassembly of actuator is required for maintenance,
firstly remove the actuator from the valve. Before
performing any disassembly operations it is important
to verify that the actuator is not pressurised.
Always use caution and double check that the ports 2 and
4 are vented and are free from any accessory and/or
device. When the actuator is a spring return unit, make
sure that the actuator is in the failed position and with
pistons completely inwards before disassembling.
A) Removal of position indicator and graduated ring
(Part N° 19,19.0,19.1), figure 01:
• Remove cap screw (39) if
fitted.
• Lift position indicator (19
or 19.1) off shaft, it may
be necessary to pry gently
with a screwdriver.
• Lift, if necessary, the
graduated ring (19.0)
off the body, it may be
necessary to pry gently
with a screwdriver.
B) Removal of stop cap screws (Part N° 02), figure 02:
• Remove both stop cap
screws together with nut
(04) and washer (03).
• R e m o v e s t o p s c r e w
o-rings (11) and discard if
replacing all soft parts.
C) End caps disassembly (Part N° 30), figure 03:
• End caps disassembly for spring return actuators
(disassemble one end cap at a time).
Unscrew the end cap bolts (13) in the sequence shown in
figure 03, until the end-caps are free from springs force
(for AT045U and AT051U 20-23 turns of the screws, for
AT101U to AT801U 4-5 turns of the screws).
Then completely unscrew the screws and remove the
end-cap and the springs.
If there is still force on the end-caps after unscrewing as
indicated above, this may indicate that spring cartridge is
damaged or that the pistons are not completely closed,
so any further disassembly should be discontinued.
Further disassembly of the end caps may result in injury.
• End caps disassembly for double acting actuators
(disassemble one end cap at a time)
Unscrew the end cap bolts (13) in the sequence shown in
figure 03, until the screws are completely unscrewed and
the end caps are free.
• Remove the o-rings (14) using a screwdriver. Discard soft
parts if replacing.
• Only for actuators with adjustment 50% or 100%, remove
the nut 04R, the washers 03R and o-rings 11R and
discard soft parts if replacing.
D) Pistons disassembly (Part N° 40), figure 04:
• Holding the body (50) in a vice or similar device, rotate the
drive shaft (60) until the pistons (40) are released. Caution:
air pressure should not be used to remove the pistons from
the body.
• Remove o-rings (16) using a screwdriver. Remove the
piston back (05) and piston head (15) bearings.
• Discard bearings when replacing all soft components.
E) Drive shaft disassembly (Part N° 60), figure 05:
• If necessary, remove the graduated ring (19.0) with a
screwdriver, remove the spring clip (18) using snap-ring
pliers or screwdriver for spiral rings, remove the thrust
washer (10) and the external thrust bearing (08). Apply
downward force to top of drive shaft (60), until it is partially
out of the bottom of the body when it is possible to
remove the internal thrust bearing (08) and the octi-cam
(01), then push the pinion (60) completely out of the
body. If pinion is not easily removed, gently tap the top
of the shaft with a plastic hammer.
Fig. 05
Fig. 04
IMAT 4thGU-E
8
GB
Fig. 03
Fig. 01
Fig. 02
6.2) DISASSEMBLY
When disassembly of actuator is required for maintenance,
firstly remove the actuator from the valve. Before
performing any disassembly operations it is important
to verify that the actuator is not pressurised.
Always use caution and double check that the ports 2 and
4 are vented and are free from any accessory and/or
device. When the actuator is a spring return unit, make
sure that the actuator is in the failed position and with
pistons completely inwards before disassembling.
A) Removal of position indicator and graduated ring
(Part N° 19,19.0,19.1), figure 01:
• Remove cap screw (39) if
fitted.
• Lift position indicator (19
or 19.1) off shaft, it may
be necessary to pry gently
with a screwdriver.
• Lift, if necessary, the
graduated ring (19.0)
off the body, it may be
necessary to pry gently
with a screwdriver.
B) Removal of stop cap screws (Part N° 02), figure 02:
• Remove both stop cap
screws together with nut
(04) and washer (03).
• R e m o v e s t o p s c r e w
o-rings (11) and discard if
replacing all soft parts.
C) End caps disassembly (Part N° 30), figure 03:
• End caps disassembly for spring return actuators
(disassemble one end cap at a time).
Unscrew the end cap bolts (13) in the sequence shown in
figure 03, until the end-caps are free from springs force
(for AT045U and AT051U 20-23 turns of the screws, for
AT101U to AT801U 4-5 turns of the screws).
Then completely unscrew the screws and remove the
end-cap and the springs.
If there is still force on the end-caps after unscrewing as
indicated above, this may indicate that spring cartridge is
damaged or that the pistons are not completely closed,
so any further disassembly should be discontinued.
Further disassembly of the end caps may result in injury.
• End caps disassembly for double acting actuators
(disassemble one end cap at a time)
Unscrew the end cap bolts (13) in the sequence shown in
figure 03, until the screws are completely unscrewed and
the end caps are free.
• Remove the o-rings (14) using a screwdriver. Discard soft
parts if replacing.
• Only for actuators with adjustment 50% or 100%, remove
the nut 04R, the washers 03R and o-rings 11R and
discard soft parts if replacing.
D) Pistons disassembly (Part N° 40), figure 04:
• Holding the body (50) in a vice or similar device, rotate the
drive shaft (60) until the pistons (40) are released. Caution:
air pressure should not be used to remove the pistons from
the body.
• Remove o-rings (16) using a screwdriver. Remove the
piston back (05) and piston head (15) bearings.
• Discard bearings when replacing all soft components.
E) Drive shaft disassembly (Part N° 60), figure 05:
• If necessary, remove the graduated ring (19.0) with a
screwdriver, remove the spring clip (18) using snap-ring
pliers or screwdriver for spiral rings, remove the thrust
washer (10) and the external thrust bearing (08). Apply
downward force to top of drive shaft (60), until it is partially
out of the bottom of the body when it is possible to
remove the internal thrust bearing (08) and the octi-cam
(01), then push the pinion (60) completely out of the
body. If pinion is not easily removed, gently tap the top
of the shaft with a plastic hammer.
C) End caps disassembly (Part N° 30), gure 03:
• End caps disassembly for spring return actuators (disassemble one
end cap at a time). Unscrew the end cap bolts (13) in the sequence
shown in gure 03, until the end-caps are free from springs force
(for AL 79-045U and AL 79-051U 20-23 turns of the screws, for AL
79-101U to AL 79-801U 4-5 turns of the screws). Then completely
unscrew the screws and remove the end-cap and the springs. If there
is still force on the end-caps after unscrewing as indicated above, this
may indicate that spring cartridge is damaged or that the pistons are
not completely closed, so any further disassembly should be disconti-
nued. Further disassembly of the end caps may result in injury.
• End caps disassembly for double acting actuators (disassemble one
end cap at a time). Unscrew the end cap bolts (13) in the sequence
shown in gure 03, until the screws are completely unscrewed and
the end caps are free.
• Remove the o-rings (14) using a screwdriver. Discard soft parts if
replacing.
• Only for actuators with adjustment 50% or 100%, remove the
nut 04R, the washers 03R and o-rings 11R and discard soft parts if
replacing.
D) Pistons disassembly (Part N° 40), gure 04:
Fig. 05
Fig. 04
IMAT 4thGU-E
8
GB
Fig. 03
Fig. 01
Fig. 02
6.2) DISASSEMBLY
When disassembly of actuator is required for maintenance,
firstly remove the actuator from the valve. Before
performing any disassembly operations it is important
to verify that the actuator is not pressurised.
Always use caution and double check that the ports 2 and
4 are vented and are free from any accessory and/or
device. When the actuator is a spring return unit, make
sure that the actuator is in the failed position and with
pistons completely inwards before disassembling.
A) Removal of position indicator and graduated ring
(Part N° 19,19.0,19.1), figure 01:
• Remove cap screw (39) if
fitted.
• Lift position indicator (19
or 19.1) off shaft, it may
be necessary to pry gently
with a screwdriver.
• Lift, if necessary, the
graduated ring (19.0)
off the body, it may be
necessary to pry gently
with a screwdriver.
B) Removal of stop cap screws (Part N° 02), figure 02:
• Remove both stop cap
screws together with nut
(04) and washer (03).
• R e m o v e s t o p s c r e w
o-rings (11) and discard if
replacing all soft parts.
C) End caps disassembly (Part N° 30), figure 03:
• End caps disassembly for spring return actuators
(disassemble one end cap at a time).
Unscrew the end cap bolts (13) in the sequence shown in
figure 03, until the end-caps are free from springs force
(for AT045U and AT051U 20-23 turns of the screws, for
AT101U to AT801U 4-5 turns of the screws).
Then completely unscrew the screws and remove the
end-cap and the springs.
If there is still force on the end-caps after unscrewing as
indicated above, this may indicate that spring cartridge is
damaged or that the pistons are not completely closed,
so any further disassembly should be discontinued.
Further disassembly of the end caps may result in injury.
• End caps disassembly for double acting actuators
(disassemble one end cap at a time)
Unscrew the end cap bolts (13) in the sequence shown in
figure 03, until the screws are completely unscrewed and
the end caps are free.
• Remove the o-rings (14) using a screwdriver. Discard soft
parts if replacing.
• Only for actuators with adjustment 50% or 100%, remove
the nut 04R, the washers 03R and o-rings 11R and
discard soft parts if replacing.
D) Pistons disassembly (Part N° 40), figure 04:
• Holding the body (50) in a vice or similar device, rotate the
drive shaft (60) until the pistons (40) are released. Caution:
air pressure should not be used to remove the pistons from
the body.
• Remove o-rings (16) using a screwdriver. Remove the
piston back (05) and piston head (15) bearings.
• Discard bearings when replacing all soft components.
E) Drive shaft disassembly (Part N° 60), figure 05:
• If necessary, remove the graduated ring (19.0) with a
screwdriver, remove the spring clip (18) using snap-ring
pliers or screwdriver for spiral rings, remove the thrust
washer (10) and the external thrust bearing (08). Apply
downward force to top of drive shaft (60), until it is partially
out of the bottom of the body when it is possible to
remove the internal thrust bearing (08) and the octi-cam
(01), then push the pinion (60) completely out of the
body. If pinion is not easily removed, gently tap the top
of the shaft with a plastic hammer.
E) Drive shaft disassembly (Part N° 60), gure 05:
• If necessary, remove the graduated ring (19.0) with a screwdriver,
remove the spring clip (18) using snap-ring pliers or screwdriver for
spiral rings, remove the thrust washer (10) and the external thrust
bearing (08).Apply downward force to top of drive shaft (60), until
it is partially out of the bottom of the body when it is possible to
remove the internal thrust bearing (08) and the octi-cam (01), then
push the pinion (60) completely out of the body. If pinion is not easily
removed, gently tap the top of the shaft with a plastic hammer.
• Remove top (06) and bottom (07) pinion bearings and top (20) and
bottom (21) pinion o-rings.
• Discard bearings (06) and (07), internal and external thrust washer
(08) and o-rings (20) and (21) if replacing the soft components.
All the components disassembled and not replaced will have to be
cleaned and inspected for wear and before reassembly, if necessary,
also replace the plugs (09).
Fig. 05
Fig. 04
IMAT 4thGU-E
8
GB
Fig. 03
Fig. 01
Fig. 02
6.2) DISASSEMBLY
When disassembly of actuator is required for maintenance,
firstly remove the actuator from the valve. Before
performing any disassembly operations it is important
to verify that the actuator is not pressurised.
Always use caution and double check that the ports 2 and
4 are vented and are free from any accessory and/or
device. When the actuator is a spring return unit, make
sure that the actuator is in the failed position and with
pistons completely inwards before disassembling.
A) Removal of position indicator and graduated ring
(Part N° 19,19.0,19.1), figure 01:
• Remove cap screw (39) if
fitted.
• Lift position indicator (19
or 19.1) off shaft, it may
be necessary to pry gently
with a screwdriver.
• Lift, if necessary, the
graduated ring (19.0)
off the body, it may be
necessary to pry gently
with a screwdriver.
B) Removal of stop cap screws (Part N° 02), figure 02:
• Remove both stop cap
screws together with nut
(04) and washer (03).
• R e m o v e s t o p s c r e w
o-rings (11) and discard if
replacing all soft parts.
C) End caps disassembly (Part N° 30), figure 03:
• End caps disassembly for spring return actuators
(disassemble one end cap at a time).
Unscrew the end cap bolts (13) in the sequence shown in
figure 03, until the end-caps are free from springs force
(for AT045U and AT051U 20-23 turns of the screws, for
AT101U to AT801U 4-5 turns of the screws).
Then completely unscrew the screws and remove the
end-cap and the springs.
If there is still force on the end-caps after unscrewing as
indicated above, this may indicate that spring cartridge is
damaged or that the pistons are not completely closed,
so any further disassembly should be discontinued.
Further disassembly of the end caps may result in injury.
• End caps disassembly for double acting actuators
(disassemble one end cap at a time)
Unscrew the end cap bolts (13) in the sequence shown in
figure 03, until the screws are completely unscrewed and
the end caps are free.
• Remove the o-rings (14) using a screwdriver. Discard soft
parts if replacing.
• Only for actuators with adjustment 50% or 100%, remove
the nut 04R, the washers 03R and o-rings 11R and
discard soft parts if replacing.
D) Pistons disassembly (Part N° 40), figure 04:
• Holding the body (50) in a vice or similar device, rotate the
drive shaft (60) until the pistons (40) are released. Caution:
air pressure should not be used to remove the pistons from
the body.
• Remove o-rings (16) using a screwdriver. Remove the
piston back (05) and piston head (15) bearings.
• Discard bearings when replacing all soft components.
E) Drive shaft disassembly (Part N° 60), figure 05:
• If necessary, remove the graduated ring (19.0) with a
screwdriver, remove the spring clip (18) using snap-ring
pliers or screwdriver for spiral rings, remove the thrust
washer (10) and the external thrust bearing (08). Apply
downward force to top of drive shaft (60), until it is partially
out of the bottom of the body when it is possible to
remove the internal thrust bearing (08) and the octi-cam
(01), then push the pinion (60) completely out of the
body. If pinion is not easily removed, gently tap the top
of the shaft with a plastic hammer.
Fig. 05
Fig. 04
IMAT 4thGU-E
8
GB
Fig. 03
Fig. 01
Fig. 02
6.2) DISASSEMBLY
When disassembly of actuator is required for maintenance,
firstly remove the actuator from the valve. Before
performing any disassembly operations it is important
to verify that the actuator is not pressurised.
Always use caution and double check that the ports 2 and
4 are vented and are free from any accessory and/or
device. When the actuator is a spring return unit, make
sure that the actuator is in the failed position and with
pistons completely inwards before disassembling.
A) Removal of position indicator and graduated ring
(Part N° 19,19.0,19.1), figure 01:
• Remove cap screw (39) if
fitted.
• Lift position indicator (19
or 19.1) off shaft, it may
be necessary to pry gently
with a screwdriver.
• Lift, if necessary, the
graduated ring (19.0)
off the body, it may be
necessary to pry gently
with a screwdriver.
B) Removal of stop cap screws (Part N° 02), figure 02:
• Remove both stop cap
screws together with nut
(04) and washer (03).
• R e m o v e s t o p s c r e w
o-rings (11) and discard if
replacing all soft parts.
C) End caps disassembly (Part N° 30), figure 03:
• End caps disassembly for spring return actuators
(disassemble one end cap at a time).
Unscrew the end cap bolts (13) in the sequence shown in
figure 03, until the end-caps are free from springs force
(for AT045U and AT051U 20-23 turns of the screws, for
AT101U to AT801U 4-5 turns of the screws).
Then completely unscrew the screws and remove the
end-cap and the springs.
If there is still force on the end-caps after unscrewing as
indicated above, this may indicate that spring cartridge is
damaged or that the pistons are not completely closed,
so any further disassembly should be discontinued.
Further disassembly of the end caps may result in injury.
• End caps disassembly for double acting actuators
(disassemble one end cap at a time)
Unscrew the end cap bolts (13) in the sequence shown in
figure 03, until the screws are completely unscrewed and
the end caps are free.
• Remove the o-rings (14) using a screwdriver. Discard soft
parts if replacing.
• Only for actuators with adjustment 50% or 100%, remove
the nut 04R, the washers 03R and o-rings 11R and
discard soft parts if replacing.
D) Pistons disassembly (Part N° 40), figure 04:
• Holding the body (50) in a vice or similar device, rotate the
drive shaft (60) until the pistons (40) are released. Caution:
air pressure should not be used to remove the pistons from
the body.
• Remove o-rings (16) using a screwdriver. Remove the
piston back (05) and piston head (15) bearings.
• Discard bearings when replacing all soft components.
E) Drive shaft disassembly (Part N° 60), figure 05:
• If necessary, remove the graduated ring (19.0) with a
screwdriver, remove the spring clip (18) using snap-ring
pliers or screwdriver for spiral rings, remove the thrust
washer (10) and the external thrust bearing (08). Apply
downward force to top of drive shaft (60), until it is partially
out of the bottom of the body when it is possible to
remove the internal thrust bearing (08) and the octi-cam
(01), then push the pinion (60) completely out of the
body. If pinion is not easily removed, gently tap the top
of the shaft with a plastic hammer.
• Holding the body (50) in a
vice or similar device, rotate the
drive shaft (60) until the pistons
(40) are released. Caution: air
pressure should not be used to
remove the pistons from the
body.
• Remove o-rings (16) using a
screwdriver. Remove the piston
back (05) and piston head (15)
bearings.
• Discard bearings when repla-
cing all soft components.

5.612B_UK - 8
Ref. 5.612B_UK - 2021-03-01. www.axel-larsson.se
MANUAL
Actuator AL 79-045U to AL 79-801U
6.3 Assembly
Prior to assembly, ensure that:
• all the components are perfectly clean and in good condition.
• the spare parts and the lubricant used are suitable for the operating
temperature of the actuator (see Air Torque technical data sheets).
• Note:The lubricants suitable for the various operating temperatures
(Standard, HT and LLT actuators) are available in Axel Larsson.
Only for “standard” actuators, for temperature from -40°C (-40°F)
to +80°C (+176°F), it is possible to use lubricant Dow Corning type
Molykote G-2003.
A) Drive shaft assembly (Part N° 60), gures 06, 07 and 07A:
• Insert partially the drive shaft (60) in the body (50), install octi-cam
(01) in the correct position (for standard assembly or for lock-out)
as shown in gures 07 and 07A, related to the bottom and top of the
drive shaft and the rotation of the actuator when energised. Install
the internal thrust bearing (08). Insert completely the drive shaft in
the body.
• Fit external thrust bearing (08), thrust washer (10) and then ex-
ternal spring clip (18) using snap ring pliers or screwdriver for spiral
rings.
B) Pistons assembly (Part N° 40), gures 08, 09, 10 and 11:
• Grease and install o-rings (16), piston back (05) and piston head (15)
bearings.
• Grease the internal surface of the body (50) and the piston (40)
rack teeth.
• Insert the female connection of the drive shaft (60) in a properly
xed coupling.
• Ensure that the octi-cam is in the right position as shown in gure
09.
• Install top (06) and
bottom (07) bearings,
grease and insert the
bottom (20) and top
(21) pinion o-rings
onto the shaft.
• Grease the outside
surface of the drive
shaft as shown in
gure 06.
Fig. 06
Fig. 08 Fig. 09
9
IMAT 4thGU-E GB
Fig. 10
• Remove top (06) and bottom (07) pinion bearings and top
(20) and bottom (21) pinion o-rings.
• Discard bearings (06) and (07), internal and external thrust
washer (08) and o-rings (20) and (21) if replacing the soft
components.
All the components disassembled and not replaced will
have to be cleaned and inspected for wear and before
reassembly, if necessary, also replace the plugs (09).
6.3) ASSEMBL
Y:
Prior to assembly, ensure that:
• all the components are perfectly clean and in good
condition.
• the spare parts and the lubricant used are suitable for the
operating temperature of the actuator (see Air Torque
technical data sheets).
• Note: The lubricants suitable for the various operating
temperatures (Standard, HT and LLT actuators) are
available in Air Torque.
Only for “standard” actuators, for temperature from -40°C
(-40°F) to +80°C (+176°F), it is possible to use lubricant
Dow Corning type Molykote®G-2003.
A) Drive shaft assembly (Part N° 60), figures 06, 07
and 07A:
• Install top (06) and
bottom (07) bearings,
grease and insert the
bottom (20) and top
(21) pinion o-rings
onto the shaft.
• Grease the outside
surface of the drive
shaft as shown in figure
06.
• Insert partially the drive shaft (60) in the body (50),
install octi-cam (01) in the correct position (for standard
assembly or for lock-out) as shown in figures 07 and
07A, related to the bottom and top of the drive shaft and
the rotation of the actuator when energised. Install the
internal thrust bearing (08). Insert completely the drive
shaft in the body.
• Fit external thrust bearing (08), thrust washer (10) and then
external spring clip (18) using snap ring pliers or screwdriver
for spiral rings.
B) Pistons assembly (Part N° 40), figures 08, 09, 10 and 11:
• Grease and install o-rings (16), piston back (05) and
piston head (15) bearings.
• Grease the internal surface of the body (50) and the
piston (40) rack teeth.
• Insert the female connection of the drive shaft (60) in a
properly fixed coupling.
• Ensure that the octi-cam is in the right position as shown
in figure 09.
• For standard rotation assembly type “ST” (clockwise to
close), rotate the body (50) about 40-45° clockwise from
top view, as shown in figure 10.
• Insert and press the two pistons (40) simultaneously
inside the body (50) until the pistons are engaged, then
rotate the body anticlockwise from top view until the
stroke is completed.
• Ensure that with pistons completely closed, the rotation
obtained referred to the axis of the body is about over 0°
Fig. 07A
Fig. 07
Fig. 06 Fig. 08 Fig. 09
9
IMAT 4thGU-E GB
Fig. 10
• Remove top (06) and bottom (07) pinion bearings and top
(20) and bottom (21) pinion o-rings.
• Discard bearings (06) and (07), internal and external thrust
washer (08) and o-rings (20) and (21) if replacing the soft
components.
All the components disassembled and not replaced will
have to be cleaned and inspected for wear and before
reassembly, if necessary, also replace the plugs (09).
6.3) ASSEMBL
Y:
Prior to assembly, ensure that:
• all the components are perfectly clean and in good
condition.
• the spare parts and the lubricant used are suitable for the
operating temperature of the actuator (see Air Torque
technical data sheets).
• Note: The lubricants suitable for the various operating
temperatures (Standard, HT and LLT actuators) are
available in Air Torque.
Only for “standard” actuators, for temperature from -40°C
(-40°F) to +80°C (+176°F), it is possible to use lubricant
Dow Corning type Molykote®G-2003.
A) Drive shaft assembly (Part N° 60), figures 06, 07
and 07A:
• Install top (06) and
bottom (07) bearings,
grease and insert the
bottom (20) and top
(21) pinion o-rings
onto the shaft.
• Grease the outside
surface of the drive
shaft as shown in figure
06.
• Insert partially the drive shaft (60) in the body (50),
install octi-cam (01) in the correct position (for standard
assembly or for lock-out) as shown in figures 07 and
07A, related to the bottom and top of the drive shaft and
the rotation of the actuator when energised. Install the
internal thrust bearing (08). Insert completely the drive
shaft in the body.
• Fit external thrust bearing (08), thrust washer (10) and then
external spring clip (18) using snap ring pliers or screwdriver
for spiral rings.
B) Pistons assembly (Part N° 40), figures 08, 09, 10 and 11:
• Grease and install o-rings (16), piston back (05) and
piston head (15) bearings.
• Grease the internal surface of the body (50) and the
piston (40) rack teeth.
• Insert the female connection of the drive shaft (60) in a
properly fixed coupling.
• Ensure that the octi-cam is in the right position as shown
in figure 09.
• For standard rotation assembly type “ST” (clockwise to
close), rotate the body (50) about 40-45° clockwise from
top view, as shown in figure 10.
• Insert and press the two pistons (40) simultaneously
inside the body (50) until the pistons are engaged, then
rotate the body anticlockwise from top view until the
stroke is completed.
• Ensure that with pistons completely closed, the rotation
obtained referred to the axis of the body is about over 0°
Fig. 07A
Fig. 07
Fig. 06
Fig. 08 Fig. 09
9
IMAT 4thGU-E GB
Fig. 10
• Remove top (06) and bottom (07) pinion bearings and top
(20) and bottom (21) pinion o-rings.
• Discard bearings (06) and (07), internal and external thrust
washer (08) and o-rings (20) and (21) if replacing the soft
components.
All the components disassembled and not replaced will
have to be cleaned and inspected for wear and before
reassembly, if necessary, also replace the plugs (09).
6.3) ASSEMBL
Y:
Prior to assembly, ensure that:
• all the components are perfectly clean and in good
condition.
• the spare parts and the lubricant used are suitable for the
operating temperature of the actuator (see Air Torque
technical data sheets).
• Note: The lubricants suitable for the various operating
temperatures (Standard, HT and LLT actuators) are
available in Air Torque.
Only for “standard” actuators, for temperature from -40°C
(-40°F) to +80°C (+176°F), it is possible to use lubricant
Dow Corning type Molykote®G-2003.
A) Drive shaft assembly (Part N° 60), figures 06, 07
and 07A:
• Install top (06) and
bottom (07) bearings,
grease and insert the
bottom (20) and top
(21) pinion o-rings
onto the shaft.
• Grease the outside
surface of the drive
shaft as shown in figure
06.
• Insert partially the drive shaft (60) in the body (50),
install octi-cam (01) in the correct position (for standard
assembly or for lock-out) as shown in figures 07 and
07A, related to the bottom and top of the drive shaft and
the rotation of the actuator when energised. Install the
internal thrust bearing (08). Insert completely the drive
shaft in the body.
• Fit external thrust bearing (08), thrust washer (10) and then
external spring clip (18) using snap ring pliers or screwdriver
for spiral rings.
B) Pistons assembly (Part N° 40), figures 08, 09, 10 and 11:
• Grease and install o-rings (16), piston back (05) and
piston head (15) bearings.
• Grease the internal surface of the body (50) and the
piston (40) rack teeth.
• Insert the female connection of the drive shaft (60) in a
properly fixed coupling.
• Ensure that the octi-cam is in the right position as shown
in figure 09.
• For standard rotation assembly type “ST” (clockwise to
close), rotate the body (50) about 40-45° clockwise from
top view, as shown in figure 10.
• Insert and press the two pistons (40) simultaneously
inside the body (50) until the pistons are engaged, then
rotate the body anticlockwise from top view until the
stroke is completed.
• Ensure that with pistons completely closed, the rotation
obtained referred to the axis of the body is about over 0°
Fig. 07A
Fig. 07
• For standard rotation assembly type “ST” (clockwise to close),
rotate the body (50) about 40-45° clockwise from top view, as shown
in gure 10.
Fig. 06 Fig. 08 Fig. 09
9
IMAT 4thGU-E GB
Fig. 10
• Remove top (06) and bottom (07) pinion bearings and top
(20) and bottom (21) pinion o-rings.
• Discard bearings (06) and (07), internal and external thrust
washer (08) and o-rings (20) and (21) if replacing the soft
components.
All the components disassembled and not replaced will
have to be cleaned and inspected for wear and before
reassembly, if necessary, also replace the plugs (09).
6.3) ASSEMBLY:
Prior to assembly, ensure that:
• all the components are perfectly clean and in good
condition.
• the spare parts and the lubricant used are suitable for the
operating temperature of the actuator (see Air Torque
technical data sheets).
• Note: The lubricants suitable for the various operating
temperatures (Standard, HT and LLT actuators) are
available in Air Torque.
Only for “standard” actuators, for temperature from -40°C
(-40°F) to +80°C (+176°F), it is possible to use lubricant
Dow Corning type Molykote®G-2003.
A) Drive shaft assembly (Part N° 60), figures 06, 07
and 07A:
• Install top (06) and
bottom (07) bearings,
grease and insert the
bottom (20) and top
(21) pinion o-rings
onto the shaft.
• Grease the outside
surface of the drive
shaft as shown in figure
06.
• Insert partially the drive shaft (60) in the body (50),
install octi-cam (01) in the correct position (for standard
assembly or for lock-out) as shown in figures 07 and
07A, related to the bottom and top of the drive shaft and
the rotation of the actuator when energised. Install the
internal thrust bearing (08). Insert completely the drive
shaft in the body.
• Fit external thrust bearing (08), thrust washer (10) and then
external spring clip (18) using snap ring pliers or screwdriver
for spiral rings.
B) Pistons assembly (Part N° 40), figures 08, 09, 10 and 11:
• Grease and install o-rings (16), piston back (05) and
piston head (15) bearings.
• Grease the internal surface of the body (50) and the
piston (40) rack teeth.
• Insert the female connection of the drive shaft (60) in a
properly fixed coupling.
• Ensure that the octi-cam is in the right position as shown
in figure 09.
• For standard rotation assembly type “ST” (clockwise to
close), rotate the body (50) about 40-45° clockwise from
top view, as shown in figure 10.
• Insert and press the two pistons (40) simultaneously
inside the body (50) until the pistons are engaged, then
rotate the body anticlockwise from top view until the
stroke is completed.
• Ensure that with pistons completely closed, the rotation
obtained referred to the axis of the body is about over 0°
Fig. 07A
Fig. 07
• Insert and press the two pistons (40) simultaneously inside the body
(50) until the pistons are engaged, then rotate the body anticlockwise
from top view until the stroke is completed.
Fig. 06 Fig. 08 Fig. 09
9
IMAT 4thGU-E GB
Fig. 10
• Remove top (06) and bottom (07) pinion bearings and top
(20) and bottom (21) pinion o-rings.
• Discard bearings (06) and (07), internal and external thrust
washer (08) and o-rings (20) and (21) if replacing the soft
components.
All the components disassembled and not replaced will
have to be cleaned and inspected for wear and before
reassembly, if necessary, also replace the plugs (09).
6.3) ASSEMBL
Y:
Prior to assembly, ensure that:
• all the components are perfectly clean and in good
condition.
• the spare parts and the lubricant used are suitable for the
operating temperature of the actuator (see Air Torque
technical data sheets).
• Note: The lubricants suitable for the various operating
temperatures (Standard, HT and LLT actuators) are
available in Air Torque.
Only for “standard” actuators, for temperature from -40°C
(-40°F) to +80°C (+176°F), it is possible to use lubricant
Dow Corning type Molykote®G-2003.
A) Drive shaft assembly (Part N° 60), figures 06, 07
and 07A:
• Install top (06) and
bottom (07) bearings,
grease and insert the
bottom (20) and top
(21) pinion o-rings
onto the shaft.
• Grease the outside
surface of the drive
shaft as shown in figure
06.
• Insert partially the drive shaft (60) in the body (50),
install octi-cam (01) in the correct position (for standard
assembly or for lock-out) as shown in figures 07 and
07A, related to the bottom and top of the drive shaft and
the rotation of the actuator when energised. Install the
internal thrust bearing (08). Insert completely the drive
shaft in the body.
• Fit external thrust bearing (08), thrust washer (10) and then
external spring clip (18) using snap ring pliers or screwdriver
for spiral rings.
B) Pistons assembly (Part N° 40), figures 08, 09, 10 and 11:
• Grease and install o-rings (16), piston back (05) and
piston head (15) bearings.
• Grease the internal surface of the body (50) and the
piston (40) rack teeth.
• Insert the female connection of the drive shaft (60) in a
properly fixed coupling.
• Ensure that the octi-cam is in the right position as shown
in figure 09.
• For standard rotation assembly type “ST” (clockwise to
close), rotate the body (50) about 40-45° clockwise from
top view, as shown in figure 10.
• Insert and press the two pistons (40) simultaneously
inside the body (50) until the pistons are engaged, then
rotate the body anticlockwise from top view until the
stroke is completed.
• Ensure that with pistons completely closed, the rotation
obtained referred to the axis of the body is about over 0°
Fig. 07A
Fig. 07

5.612B_UK - 9
Ref. 5.612B_UK - 2021-03-01. www.axel-larsson.se
MANUAL
Actuator AL 79-045U to AL 79-801U
for models AT051U→AT801U (0,5° over 0° for AT045U)
and that the dimension “A” on both sides is the same as
shown in figure 11.
C) End cap (Part N° 30) assembly, figures 12, 13 and 14:
• Assemble one end cap at a time.
• Lubricate the body.
• For spring return actuators, insert the springs in each
end cap according to the desired configuration, as shown
in figure 12 and related tables. For models
AT101U→AT801U insert spring cartridges as shown in
figure 13.
SPRING SET CONFIGURATION
AT045U configuration:
AT051U configuration:
• Fit end cap o-ring seal (14) into the groove on both end caps.
Fig. 12
Fig. 11
IMAT 4thGU-E
10
GB
Spring Set
S1-1
S1-2
S2-2
S2-3
S3-3
Side B
AT045U
Spring type
1 (green)
1 (green)
2 (red)
2 (red)
3 (black)
Side A
AT045U
Spring type
1 (green)
2 (red)
2 (red)
3 (black)
3 (black)
Spring
Set
S1
S2
S3
S4
S5
S6
S7
S8
AT051U
Internal
Spring type
1(green)
------------
------------
------------
------------
1 (green)
1 (green)
1 (green)
AT051U
External
Spring type
------------
2 (black)
2 (black)
3 (red)
3 (red)
2 (black)
2 (black)
3 (red)
AT051U
Internal
Spring type
------------
------------
------------
------------
1 (green)
1 (green)
1 (green)
1 (green)
AT051U
External
Spring type
2 (black)
2 (black)
3 (red)
3 (red)
2 (black)
2 (black)
3 (red)
3 (red)
Side B Side A
Fig. 14
Fig. 13
• Ensure that with pistons completely closed, the rotation obtained
referred to the axis of the body is about over 0° for models AL
79-051U to AL 79-801U (0,5° over 0° for AL 79-045U) and that the
dimension “A” on both sides is the same as shown in gure 11.
for models AT051U→AT801U (0,5° over 0° for AT045U)
and that the dimension “A” on both sides is the same as
shown in figure 11.
C) End cap (Part N° 30) assembly, figures 12, 13 and 14:
• Assemble one end cap at a time.
• Lubricate the body.
• For spring return actuators, insert the springs in each
end cap according to the desired configuration, as shown
in figure 12 and related tables. For models
AT101U→AT801U insert spring cartridges as shown in
figure 13.
SPRING SET CONFIGURATION
AT045U configuration:
AT051U configuration:
• Fit end cap o-ring seal (14) into the groove on both end caps.
Fig. 12
Fig. 11
IMAT 4thGU-E
10
GB
Spring Set
S1-1
S1-2
S2-2
S2-3
S3-3
Side B
AT045U
Spring type
1 (green)
1 (green)
2 (red)
2 (red)
3 (black)
Side A
AT045U
Spring type
1 (green)
2 (red)
2 (red)
3 (black)
3 (black)
Spring
Set
S1
S2
S3
S4
S5
S6
S7
S8
AT051U
Internal
Spring type
1(green)
------------
------------
------------
------------
1 (green)
1 (green)
1 (green)
AT051U
External
Spring type
------------
2 (black)
2 (black)
3 (red)
3 (red)
2 (black)
2 (black)
3 (red)
AT051U
Internal
Spring type
------------
------------
------------
------------
1 (green)
1 (green)
1 (green)
1 (green)
AT051U
External
Spring type
2 (black)
2 (black)
3 (red)
3 (red)
2 (black)
2 (black)
3 (red)
3 (red)
Side B Side A
Fig. 14
Fig. 13
C) End cap (Part N° 30) assembly, gures 12, 13 and 14:
• Assemble one end cap at a time.
• Lubricate the body.
• For spring return actuators, insert the springs in each end cap
according to the desired conguration, as shown in gure 12 and
related tables. For models AL 79-101U to AL 79-801U insert spring
cartridges as shown in gure 13.
• Fit end cap o-ring seal (14) into the groove on both end caps.
• Fit end caps onto the body (50), verifying that the o-ring remains in
the groove.
• Only for actuators with 50% or 100% stroke adjustment, ensure
that the adjustment screws 221G/222G are completely screwed into
the end-cap.
• Insert the cap screws (13) and tighten each only partially. Complete
tightening by making 1-2 turns for each screw in the sequence shown
in gure 14 until tightening is completed. See the table for screw
tightening torque.
for models AT051U→AT801U (0,5° over 0° for AT045U)
and that the dimension “A” on both sides is the same as
shown in figure 11.
C) End cap (Part N° 30) assembly, figures 12, 13 and 14:
• Assemble one end cap at a time.
• Lubricate the body.
• For spring return actuators, insert the springs in each
end cap according to the desired configuration, as shown
in figure 12 and related tables. For models
AT101U→AT801U insert spring cartridges as shown in
figure 13.
SPRING SET CONFIGURATION
AT045U configuration:
AT051U configuration:
• Fit end cap o-ring seal (14) into the groove on both end caps.
Fig. 12
Fig. 11
IMAT 4thGU-E
10
GB
Spring Set
S1-1
S1-2
S2-2
S2-3
S3-3
Side B
AT045U
Spring type
1 (green)
1 (green)
2 (red)
2 (red)
3 (black)
Side A
AT045U
Spring type
1 (green)
2 (red)
2 (red)
3 (black)
3 (black)
Spring
Set
S1
S2
S3
S4
S5
S6
S7
S8
AT051U
Internal
Spring type
1(green)
------------
------------
------------
------------
1 (green)
1 (green)
1 (green)
AT051U
External
Spring type
------------
2 (black)
2 (black)
3 (red)
3 (red)
2 (black)
2 (black)
3 (red)
AT051U
Internal
Spring type
------------
------------
------------
------------
1 (green)
1 (green)
1 (green)
1 (green)
AT051U
External
Spring type
2 (black)
2 (black)
3 (red)
3 (red)
2 (black)
2 (black)
3 (red)
3 (red)
Side B Side A
Fig. 14
Fig. 13
for models AT051U→AT801U (0,5° over 0° for AT045U)
and that the dimension “A” on both sides is the same as
shown in figure 11.
C) End cap (Part N° 30) assembly, figures 12, 13 and 14:
• Assemble one end cap at a time.
• Lubricate the body.
• For spring return actuators, insert the springs in each
end cap according to the desired configuration, as shown
in figure 12 and related tables. For models
AT101U→AT801U insert spring cartridges as shown in
figure 13.
SPRING SET CONFIGURATION
AT045U configuration:
AT051U configuration:
• Fit end cap o-ring seal (14) into the groove on both end caps.
Fig. 12
Fig. 11
IMAT 4thGU-E
10
GB
Spring Set
S1-1
S1-2
S2-2
S2-3
S3-3
Side B
AT045U
Spring type
1 (green)
1 (green)
2 (red)
2 (red)
3 (black)
Side A
AT045U
Spring type
1 (green)
2 (red)
2 (red)
3 (black)
3 (black)
Spring
Set
S1
S2
S3
S4
S5
S6
S7
S8
AT051U
Internal
Spring type
1(green)
------------
------------
------------
------------
1 (green)
1 (green)
1 (green)
AT051U
External
Spring type
------------
2 (black)
2 (black)
3 (red)
3 (red)
2 (black)
2 (black)
3 (red)
AT051U
Internal
Spring type
------------
------------
------------
------------
1 (green)
1 (green)
1 (green)
1 (green)
AT051U
External
Spring type
2 (black)
2 (black)
3 (red)
3 (red)
2 (black)
2 (black)
3 (red)
3 (red)
Side B Side A
Fig. 14
Fig. 13
Spring
set
Side B Side A
AL 79-045U spring type AL 79-045U spring type
S1-1 1 (green) 1 (green)
S1-2 1 (green) 2 (red)
S2-2 2 (red) 2 (red)
S2-3 2 (red) 3 (black)
S3-3 3 (black) 3 (black)
Spring
set
Side B Side A
AL 79-051U
internal
spring type
AL 79-051U
external
spring type
AL 79-051U
internal
spring type
AL 79-051U
external
spring type
S1 1 (green) - - 2 (black)
S2 - 2 (black) - 2 (black)
S3 - 2 (black) - 3 (red)
S4 - 3 (red) - 3 (red)
S5 - 3 (red) 1 (green) 2 (black)
S6 1 (green) 2 (black) 1 (green) 2 (black)
S7 1 (green) 2 (black) 1 (green) 3 (red)
S8 1 (green) 3 (red) 1 (green) 3 (red)

5.612B_UK - 10
Ref. 5.612B_UK - 2021-03-01. www.axel-larsson.se
MANUAL
Actuator AL 79-045U to AL 79-801U
D) Assembly of stop cap screws (Part 02) and stroke adjust-
ment for models AL 79-051U to AL 79-801U,gures 15 and 16:
• Insert on both stop screws (02) the nut (04), the washer (03) nd the
o-ring (11).
• Fit the stop cap screws (02) in the body.
• Stroke adjustment for actuators with standard type “ST” rotation /
assembly (clockwise to close).
Stroke adjustment in close position: with the actuator in close posi-
tion 0°, screw or unscrew the right (from top view) stop cap screw
until the desired stop position is achieved.Then tighten the stop
adjustment nut (04) to lock it in place.
Stroke adjustment in open position: with the actuator in open posi-
tion 90°, screw or unscrew the left (from top view) stop cap screw
until the desired stop position is achieved.Then tighten the stop
adjustment nut (04) to lock it in place.
For spring return actuators, it could be necessary to make rotation
tests to verify the correct stroke adjustment in open position.
• Only for actuators with adjustment 50% or 100%, t on end-cap
adjustment screws 221G/222G the o-rings 11R, the washers 03R and
the nuts 04R.To adjust the stroke in open position: with the actuator
in partially or totally open position, screw or unscrew the end-cap
adjustment screw 221G/222G until the desired position is achieved.
It is important that the two end-cap adjustment screws are both in
contact with the pistons.Then lock the nuts 04R.
E) Assembly of graduated ring and position indicator (Part
N° 19,19.0,19.1), gures 17,18 and 19:
• Fix the graduated ring (19.0) to the body.
• If necessary, correctly position the “Top Adaptor” (19.5) and lock it
with the proper screws (19.6).
• Insert the indicator (19 or 19.1) making sure that it indicates the
correct actuator position.
• Screw the indicator screw (39) if assembled.
7 Storage instructions
If the actuator is not for immediate use, the following precaution
must be taken for storage:
• Store the actuator in a clean and dry environment and at tempera-
ture between –20°C (-4°F) and +40°C (+104°F).
• It is recommended that the actuator be stored in its original box.
• Do not remove the plastic plugs on air supply ports.
8 Lifting and handling
It is recommended to lift the actuators with proper, adequate and
permitted systems in relation to the actuator weight and by following
the ruling laws in terms of safety and health protection.The weight of
the actuators is indicated on the data sheet. During the lifting and the
handling of the actuators, it is recommended to avoid clashes and/or
accidental falls in order to avoid irreparable damages to the actuators
and to compromise the functionality.
Contact Axel Larsson for any information.
Fig. 17
11
IMAT 4thGU-E GB
Fig. 15 Fig. 16
• Fit end caps onto the body (50), verifying that the o-ring
remains in the groove.
• Only for actuators with 50% or 100% stroke adjustment,
ensure that the adjustment screws 221G/222G are
completely screwed into the end-cap.
• Insert the cap screws (13) and tighten each only partially.
Complete tightening by making 1-2 turns for each screw
in the sequence shown in figure 14 until tightening is
completed. See the table for screw tightening torque.
D) Assembly of stop cap screws (Part 02) and stroke
adjustment for models AT051U→AT801U, figures 15
and 16:
• Insert on both stop screws (02) the nut (04), the washer
(03) and the o-ring (11).
• Fit the stop cap screws (02) in the body.
• Stroke adjustment for actuators with standard type “ST”
rotation / assembly (clockwise to close).
Stroke adjustment in close position: with the actuator in
close position 0°, screw or unscrew the right (from top
view) stop cap screw until the desired stop position is
achieved. Then tighten the stop adjustment nut (04) to
lock it in place.
Stroke adjustment in open position: with the actuator in
open position 90°, screw or unscrew the left (from top
view) stop cap screw until the desired stop position is
achieved. Then tighten the stop adjustment nut (04) to
lock it in place.
For spring return actuators, it could be necessary to
make rotation tests to verify the correct stroke adjust-
ment in open position.
• Only for actuators with adjustment 50% or 100%, fit on
end-cap adjustment screws 221G/222G the o-rings
11R, the washers 03R and the nuts 04R. To adjust the
stroke in open position: with the actuator in partially or
totally open position, screw or unscrew the end-cap ad-
justment screw 221G/222G until the desired position is
achieved. It is important that the two end-cap adjust-
ment screws are both in contact with the pistons.
Then lock the nuts 04R.
E) Assembly of graduated ring and position indicator
(Part N° 19,19.0,19.1), figures 17,18 and 19:
• Fix the graduated ring (19.0) to the body.
• If necessary, correctly position the “Top Adaptor” (19.5)
and lock it with the proper screws (19.6).
• Insert the indicator (19 or 19.1) making sure that it indicates
the correct actuator position.
• Screw the indicator screw (39) if assembled.
7) STORAGE INSTRUCTIONS
If the actuator is not for immediate use, the following
precaution must be taken for storage:
• Store the actuator in a clean and dry environment and at
temperature between –20°C (-4°F) and +40°C (+104°F).
• It is recommended that the actuator be stored in its
original box.
• Do not remove the plastic plugs on air supply ports.
8) LIFTING and HANDLING
It is recommended to lift the actuators with proper, adequate
and permitted systems in relation to the actuator weight and
by following the ruling laws in terms of safety and health
protection. The weight of the actuators is indicated on the Air
Torque catalogue and on the related technical data-sheets.
During the lifting and the handling of the actuators, it is
recommended to avoid clashes and/or accidental falls in
order to avoid irreparable damages to the actuators and to
compromise the functionality.
Contact Air Torque for any information and technical
data-sheets.
Fig. 18 Fig. 19
Fig. 17
11
IMAT 4thGU-E GB
Fig. 15 Fig. 16
• Fit end caps onto the body (50), verifying that the o-ring
remains in the groove.
• Only for actuators with 50% or 100% stroke adjustment,
ensure that the adjustment screws 221G/222G are
completely screwed into the end-cap.
• Insert the cap screws (13) and tighten each only partially.
Complete tightening by making 1-2 turns for each screw
in the sequence shown in figure 14 until tightening is
completed. See the table for screw tightening torque.
D) Assembly of stop cap screws (Part 02) and stroke
adjustment for models AT051U→AT801U, figures 15
and 16:
• Insert on both stop screws (02) the nut (04), the washer
(03) and the o-ring (11).
• Fit the stop cap screws (02) in the body.
• Stroke adjustment for actuators with standard type “ST”
rotation / assembly (clockwise to close).
Stroke adjustment in close position: with the actuator in
close position 0°, screw or unscrew the right (from top
view) stop cap screw until the desired stop position is
achieved. Then tighten the stop adjustment nut (04) to
lock it in place.
Stroke adjustment in open position: with the actuator in
open position 90°, screw or unscrew the left (from top
view) stop cap screw until the desired stop position is
achieved. Then tighten the stop adjustment nut (04) to
lock it in place.
For spring return actuators, it could be necessary to
make rotation tests to verify the correct stroke adjust-
ment in open position.
• Only for actuators with adjustment 50% or 100%, fit on
end-cap adjustment screws 221G/222G the o-rings
11R, the washers 03R and the nuts 04R. To adjust the
stroke in open position: with the actuator in partially or
totally open position, screw or unscrew the end-cap ad-
justment screw 221G/222G until the desired position is
achieved. It is important that the two end-cap adjust-
ment screws are both in contact with the pistons.
Then lock the nuts 04R.
E) Assembly of graduated ring and position indicator
(Part N° 19,19.0,19.1), figures 17,18 and 19:
• Fix the graduated ring (19.0) to the body.
• If necessary, correctly position the “Top Adaptor” (19.5)
and lock it with the proper screws (19.6).
• Insert the indicator (19 or 19.1) making sure that it indicates
the correct actuator position.
• Screw the indicator screw (39) if assembled.
7) STORAGE INSTRUCTIONS
If the actuator is not for immediate use, the following
precaution must be taken for storage:
• Store the actuator in a clean and dry environment and at
temperature between –20°C (-4°F) and +40°C (+104°F).
• It is recommended that the actuator be stored in its
original box.
• Do not remove the plastic plugs on air supply ports.
8) LIFTING and HANDLING
It is recommended to lift the actuators with proper, adequate
and permitted systems in relation to the actuator weight and
by following the ruling laws in terms of safety and health
protection. The weight of the actuators is indicated on the Air
Torque catalogue and on the related technical data-sheets.
During the lifting and the handling of the actuators, it is
recommended to avoid clashes and/or accidental falls in
order to avoid irreparable damages to the actuators and to
compromise the functionality.
Contact Air Torque for any information and technical
data-sheets.
Fig. 18 Fig. 19
Fig. 17
11
IMAT 4thGU-E GB
Fig. 15 Fig. 16
• Fit end caps onto the body (50), verifying that the o-ring
remains in the groove.
• Only for actuators with 50% or 100% stroke adjustment,
ensure that the adjustment screws 221G/222G are
completely screwed into the end-cap.
• Insert the cap screws (13) and tighten each only partially.
Complete tightening by making 1-2 turns for each screw
in the sequence shown in figure 14 until tightening is
completed. See the table for screw tightening torque.
D) Assembly of stop cap screws (Part 02) and stroke
adjustment for models AT051U→AT801U, figures 15
and 16:
• Insert on both stop screws (02) the nut (04), the washer
(03) and the o-ring (11).
• Fit the stop cap screws (02) in the body.
• Stroke adjustment for actuators with standard type “ST”
rotation / assembly (clockwise to close).
Stroke adjustment in close position: with the actuator in
close position 0°, screw or unscrew the right (from top
view) stop cap screw until the desired stop position is
achieved. Then tighten the stop adjustment nut (04) to
lock it in place.
Stroke adjustment in open position: with the actuator in
open position 90°, screw or unscrew the left (from top
view) stop cap screw until the desired stop position is
achieved. Then tighten the stop adjustment nut (04) to
lock it in place.
For spring return actuators, it could be necessary to
make rotation tests to verify the correct stroke adjust-
ment in open position.
• Only for actuators with adjustment 50% or 100%, fit on
end-cap adjustment screws 221G/222G the o-rings
11R, the washers 03R and the nuts 04R. To adjust the
stroke in open position: with the actuator in partially or
totally open position, screw or unscrew the end-cap ad-
justment screw 221G/222G until the desired position is
achieved. It is important that the two end-cap adjust-
ment screws are both in contact with the pistons.
Then lock the nuts 04R.
E) Assembly of graduated ring and position indicator
(Part N° 19,19.0,19.1), figures 17,18 and 19:
• Fix the graduated ring (19.0) to the body.
• If necessary, correctly position the “Top Adaptor” (19.5)
and lock it with the proper screws (19.6).
• Insert the indicator (19 or 19.1) making sure that it indicates
the correct actuator position.
• Screw the indicator screw (39) if assembled.
7) STORAGE INSTRUCTIONS
If the actuator is not for immediate use, the following
precaution must be taken for storage:
• Store the actuator in a clean and dry environment and at
temperature between –20°C (-4°F) and +40°C (+104°F).
• It is recommended that the actuator be stored in its
original box.
• Do not remove the plastic plugs on air supply ports.
8) LIFTING and HANDLING
It is recommended to lift the actuators with proper, adequate
and permitted systems in relation to the actuator weight and
by following the ruling laws in terms of safety and health
protection. The weight of the actuators is indicated on the Air
Torque catalogue and on the related technical data-sheets.
During the lifting and the handling of the actuators, it is
recommended to avoid clashes and/or accidental falls in
order to avoid irreparable damages to the actuators and to
compromise the functionality.
Contact Air Torque for any information and technical
data-sheets.
Fig. 18 Fig. 19
Telephone [phone] •[email protected] •www.axel-larsson.se
STOCKHOLM GÖTEBORG MOTALA FALUN UMEÅ
Design and specications subject to change without prior notice.
Head Ofce: Truckvägen 12, P.O. Box 805, SE-194 28 Upplands Väsby (Stockholm), Sweden.