Lincoln SKF 84803 Instruction Manual

User and maintenance instructions
Models , , , , 
-, /-, -, - and -in air motors
Date of issue September 2020
Form number 404192
Version 4

Contents
EC Declaration of Incorporation . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Explanation of signal words for safety . . . . . . . . . . . . . . . . . . . . . 
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Service assemblies and kits. . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Before connecting air motor to air line . . . . . . . . . . . . . . . . . . 7
Operating precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Attach air motor to pump tube . . . . . . . . . . . . . . . . . . . . . . . . . 7
Service and disassembly procedure . . . . . . . . . . . . . . . . . . . . . 8
Power valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Pilot bar subassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Cylinder tube and muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Service and assembly procedure . . . . . . . . . . . . . . . . . . . . . . . 11
Cylinder tube and muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Pilot bar subassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Power valve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 
Parts list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Series III air motor kits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Series III air motor assemblies . . . . . . . . . . . . . . . . . . . . . . . . . 19
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24


EC Declaration of Incorporation
Manufacturer: SKF
 N. Hanley Road
St. Louis, MO U.S.A.
URL: SKF.com
Phone: -
EU contact: SKF
Heinrich-Hertz-Straße -
 Walldorf
Phone:  () -
Product: Air motors
Description: reciprocating air motor to drive pumps
Model(s): , , , , 
Year of construction: see type identification plate
complies with all basic requirements of the following directives
at the time when first being launched in the market.
Report no.’s: NA
The equipment indicated on this declaration complies with the
following directives:
Machinery Directive //EC
And was evaluated using the following harmonized EN standards:
EN ISO :, EN ISO :,EN ISO :+A!:
SKF declares under its sole responsibility that the
Air motor model(s): , , ,  and 
are in conformity with the Machinery Directive //EC.
In the case of modifications or alterations of the above
mentioned machine not authorized by the manufacturer,
validity of this EC declaration of conformity will cease.
The person empowered to assemble the technical
documentation on behalf of the manufacturer is the head
of standardization; see EC-representative‘s address.
Brad Edler
Manager Product Development
Product Engineering LPD North America
Innovation and Product Management


Safety
It is responsibility of owner and/or operator
to properly use and maintain equipment.
Carefully read and understand instructions
and warnings in manual before
operating equipment.
Equipment complies with OSHA Stand-
ards where applicable.
Manual contains important warnings and
instructions. Read and retain for reference.
Explanation of signal
words for safety
NOTE
Emphasizes useful hints and
recommendations as well as
information to prevent property damage
and ensure efficient trouble-free
operation.
CAUTION
Indicates a dangerous situation that can
lead to light personal injury if
precautionary measures are ignored.
WARNING
Indicates a dangerous situation that
could lead to death or serious injury if
precautionary measures are ignored.
DANGER
Indicates a dangerous situation that will
lead to death or serious injury if
precautionary measures are ignored.
WARNING
Do not exceed stated maximum working
pressure of air motor or of lowest rated
component in system.
Do not alter or modify any part of
this equipment.
Do not operate this equipment with
combustible gas.*
Do not attempt to repair or disassemble
equipment while system is pressurized.
Tighten all fluid connections securely
before using equipment.
Always read and follow fluid manufac-
turer’s recommendations regarding fluid
compatibility, and use of protective
clothing and equipment.
Check all equipment regularly and
repair or replace worn or damaged
parts immediately.
Failure to comply with warnings
including misuse, over pressurizing,
modifying parts, using incompatible
chemicals and fluids, or using worn
or damaged parts, may result in
equipment damage and/or serious
personal injury, fire, explosion, or
property damage.
*Indicates change.


23 5/8 in
(600 mm)
15 9/16 in
(395 mm)
4 in
(102 mm)
4 in
(102 mm)
Fig. 1
Dimensions
Table 1
Specifications
Model Cylinder
diameter
Effective piston
area
Operating
pressure range
Operating
temperature range
Minimum I.D.
of air supply
Air inlet
NPTF
Air consumed
per cycle at
 psi (7 bar)
in mm incm2psi bar ° F °C in mm in SCF L(N)
  254  503  to  2 to 7 – to + –34 to +93 3/419 3/4. 103
  203  323  to  2 to 7 – to + –34 to +93 3/419 3/4. 75
  152  181  to  2 to 7 – to + –34 to +93 1/213 3/4. 46
  /108  90  to  2 to 14 – to + –34 to +93 1/213 1/2. 32
  76 45  to  2 to 14 – to + –34 to +93 3/810 1/2. 20
) PTFE seals used with power valve spool (14) and relay valve (26).*
*Indicates change.
Table 2
Specifications (continued)
Model Maximum
recommended
speed, cycles/min
Stroke length Weight Seal material ) Dimension
A B C
in mm lb kg in mm in mm in mm
   152  28 Nitrile and PTFE  1/4337  5/8295  3/4578
  152  21 Nitrile and PTFE  1/4286  9/16 243  3/4578
  152  15 Nitrile and PTFE  1/4235  3/4197  3/4578
  152  12 Nitrile and PTFE  1/2191 152  5/8600
  152  11 Nitrile and PTFE  1/2191 152  5/8600
Air
inlet
Exhaust


Service assemblies
and kits
Fig. 2
Pilot bar subassembly (35)
To reduce down-time and take advantage of
modular design of air motor, the following
service assemblies are recommended for
repair of air motor. After removal, faulty
assembly can be repaired using
corresponding soft parts kit.
For assemblies and soft parts kits
(†Series III air motor kits, page 19).
Fig. 3
Relay valve (26)
Fig. 4
Air signal valve (32)
Fig. 5
Muffler (22)
Shown with gasket (20)
For assemblies and soft parts kits
(†Series III air motor kits, page 19).
Fig. 6
Power valve subassembly
For assemblies and soft parts kits
(†Series III air motor kits, page 19).
Fig. 7
Power valve spool and body (14)
NOTE
Replace all parts included in soft parts
kit when replacing soft parts.


48
44
1
47
WARNING
Do not alter or modify any part of
this equipment.
Check equipment for proper operation
before each use.
Do not operate equipment without
safety devices installed.
Failure to comply may result in
equipment malfunction and/or damage
and result in serious personal injury.
Before connecting air
motor to air line
Lincoln series III air motors are fully
pneumatic and require a minimum specified
size of air supply hose for proper operation.
Check specification for minimum ID of air
supply hose and select corresponding sizes
of air controls and accessories for non-
restrictive air flow. Lincoln filter and
regulator with gauge are available as
combination units.
It is recommended to use  micron
minimum pneumatic filter along with
pressure regulator with system. Special
lubricant is used in assembly of air motors.
It is not recommended to lubricate system
after it has been installed as new lubricant
will wash away factory lubricant, and could
result in air motor failing. Added lubrication
could also result in critical small pneumatic
paths being blocked resulting in malfunction.
• For 3/8in air line
–Model -
• For 1/2in air line
–Model -
• For 3/4in air line
–Model -
If quick disconnect coupling should be used,
install supplied coupler to ensure proper air
motor operation.
Operating
precautions
Use Lincoln replacement parts to assure
compatible pressure rating. Comply with
all warnings.
Do not operate air motor in excess of
recommended pressure range.
Disconnect air line and relieve (vent)
pressure when air motor sits idle for long
periods of time and before servicing.
Attach air motor to
pump tube
1 Tightly attach connecting rods (48) to air
motor lower casting (44). Use short
threaded end of connecting rods
(†Fig. 8).
2 Mount air motor on top of pump tube
outlet and tightly connect pump
tube coupling nut to air motor
piston rod (1).
3 Attach connecting rods (48) to pump tube
with four nuts (47) supplied with air
motor. Leave nuts loose.
4 Connect air supply and slowly cycle pump
several times using only enough air
pressure to operate pump without stalling.
5 Stop pump on up stroke and tighten four
nuts to securely fasten air motor to
pump tube.
WARNING
Do not pump flammable material
or operate this equipment with
combustible gas.
Failure to comply may result in death
or serious injury.
WARNING
Do not exceed maximum air or fluid
working pressure of lowest rated
system component.
Failure to comply may result in death
or serious injury.
Fig. 8
NOTE*
Do not operate with air contaminated
with materials not compatible with
nitrile seals.
Use only with  in (152 mm) stroke
pump tubes.
WARNING
Do not operate pump without
recommended protective equipment.
Failure to comply may result in death
or serious injury.
*Indicates change.


10
11
12
13
13
14
15
15
16
17
18
19
Service and
disassembly
procedure
Disconnect air line and relieve (vent)
pressure when air motor sits idle for
long periods of time and before servicing.
Modular design of air motor and accessibility
of vital operation parts make service
available without taking air motor out of line
or without complete disassembly.
Fig. 9
Power valve
1 Remove four screws (11 and 19),
two on each side (†Fig. 9).
2 Remove end caps (12 and 18).
3 Push out valve spool (14).
4 Remove spool bumpers (13)
(one from each end).
5 Remove o-ring (15), one from each end.
6 Remove four screws (16) and lift
valve body (17).
7 Remove gasket (10) to complete
valve disassembly.
WARNING
Do not check, service or repair any part
of motor with air supply connected or
before relieving pressure to motor.
Failure to comply may result in
serious personal injury and/or damage
to equipment.


26
27
27
27
28
28
29
29
29
29
30
31
31
32
32
33
34
34
35
36
37
39
Pilot bar subassembly
1 Remove four screws (31), two on
upper bracket (30) and two on
lower bracket (33).
2 Pull out pilot bar subassembly (35)
and remove o-rings (29, 34, 36 and 39).
3 Remove two screws (37) and lift off
relay valve (26).
4 Remove o-rings (27 and 29) from
upper bracket (30).
5 Remove four screws (28), two on
upper bracket (30) and two on
lower bracket (33).
6 Lift off upper bracket (30) and
lower bracket (33).
7 Remove o-rings (27 and 29) and
two air signal valves (32).
Fig. 10


1
2
4
7
8 9
20
21
22
23
24
24
25
38
41
41
42
43
43
44
49
47
48
46
50
45
3
3
Cylinder tube and muffler
1 Remove two screws (21) and pull off
muffler (22) (†Fig. 11).
2 Remove gasket (20).
3 Remove two screws (24) to release end
element (23) from muffler plate (25).
4 Remove muffler element (38).
5 Unscrew four nuts (9) with open end
wrench and remove tie bolts (8).
6 Remove four tie rods (4).
7 Unscrew air tube (42) from upper
casting (7) and lower casting (44).
8 Remove o-rings (41).*
9 Lift upward and remove upper casting (7).
10Remove o-ring (2).
11Remove upper piston seal (3).
12Remove piston and piston rod (1) from
rod bearing (46).
13 Remove lower piston seal (3).
14Remove cylinder seal (43) on top of
cylinder tube (50).
15Lift upward and remove
cylinder tube (50).
16Remove remaining cylinder seal (43) and
rod bearing (46).
17 Remove adapter (45) from bottom of
lower casting (44).
18Remove U-cup (49) from bottom of
lower casting (44).
19Remove four nuts (47) from
connecting rods (48) with
open end wrench.
20Remove four connecting rods (48) from
lower casting (44).
Fig. 11
*Indicates change.


1
2
4
7
8 9
20
21
22
23
24
24
25
38
41
41
42
43
43
44
49
47
48
46
50
45
3
3
Service and assembly
procedure
Cylinder tube and muffler
1 Insert four connecting rods (48) into
lower casting (44) (†Fig. 12).
2 Tighten four nuts (47) on connecting
rods (48) with open end wrench.
3 Place U-cup (49) on bottom of
lower casting (44).
4 Insert adapter (45).
5 Position cylinder seal (43) and rod
bearing (46) on top of lower casting (44).
6 Slide lower piston seal (3) onto bottom of
piston rod (1).
7 Tighten piston and piston rod (1) into
rod bearing (46).
8 Place upper piston seal (3) on top of
piston rod assembly (1).
9 Lower cylinder tube (50) into position on
lower casting (44).
10Insert cylinder seal (43) on top of
cylinder tube (50).
11Place o-ring (2) on top of piston (1).
12Insert o-ring (41) into lower casting (44).
13 Screw in air tube (42) to
lower casting (44).
14Place remaining o-ring (41) on top of
air tube and screw air tube into
upper casting (7).
15Insert four tie rods (4).
16Tighten four nuts (9) and tie bolts (8) with
open end wrench.
17 Insert muffler element (38) to bottom of
muffler (22).
18Place muffler plate (23) inside end
element (25) and tighten two screws (24)
to secure.
19Align gasket (20) with muffler (22) and
tighten muffler to upper casting (7) with
two screws (21).
Fig. 12


26
27
27
27
28
28
29
29
29
29
30
31
31
32
32
33
34
34
35
36
37
39
7
44
Fig. 13
Pilot bar subassembly
1 Insert o-rings (27 and 29) and
two air signal valves (32) to top of
pilot bar subassembly (35) (†Fig. 13).
2 Place upper bracket on top of pilot
bar subassembly (35) and secure by
tightening two screws (28).
3 Insert air signal valve (32) to bottom of
pilot bar subassembly (35).
4 Place o-ring (27) in slot of
lower bracket (33) and tighten to
bottom of pilot bar subassembly (35)
with two screws (28).
5 Insert o-rings (27 and 29) and tighten
relay valve (26) to top of pilot bar
subassembly (35) with two screws (37).
6 Position o-rings (29, 34, 36 and 39)
with appropriate slots and slide two
screws (31) through lower bracket (33)
and two screws (31) through
upper bracket (30).
7 Tighten screws (31) to secure pilot bar
subassembly (35) to casting (7and 44).


7
11
12
13
13
14
15
15
16
17
18
19
10
Fig. 14
Power valve
1 Place gasket (10) on top of upper
casting (7) (†Fig. 14).
2 Align valve body (17) with gasket (10)
and secure to upper casting (7) with
four screws (16).
3 Insert valve spool (14) to valve body (17).
4 Place o-rings (15) into slot on each end of
valve body (17).
5 Insert spool bumbers (13), one on
each end.
6 Align end caps (12 and 18) and secure
with four screws (11 and 19), two on
each end.


1
2
3 4 1) 2)
5
6
7
8 2) 9 1) 2)
10
11
12
13
13
14
15
15
16 3)
17
18
19
20
21 4)
22
23
24
25
26
27
28
29
29
29
30
31
32
32
27
28
31
33
34
35
36
27
37
24
38
39
29
40
41
41
42
43
43
44
45
46
47
48
49
50
3
5)
34
) Used on model  only.
) Torque (4, 8and 9) as shown in Table 3.
) Torque  to  lbf-ft (14 to 16 Nm).
) Torque to  lbf-in (6 Nm). After  hours, torque to  lbf-in (6 Nm).
) Align two holes on cylinder tube (50) with two holes on pilot bar (35) before tightening tie rods (4) so proper seal with o-rings is achieved.
Fig. IPB 1
Table 3
Model Item number Torque to
lbf-ft Nm
   15
   15
   35
   72
  and   81


3
1)
36
1
35
33
45
50
46
49
Fig. IPB 2
Models 84803 and 84804
) Assemble adapter to piston rod using thread locker on threads. Torque  to  lbf-ft (81 to 88 Nm).


15
17
14
15 13
12
13
7
2
27
18
26
37
30
36
35
33
34
10
50
39
29
43
41
42
1
41
43
46 49 44
27
32
34
27
36
Fig. IPB 3
Models 84806, 84808 and 86810


16 1)
19 20
31
47
37
29
40
27
8
29
21
31
35
28
40
27
48
9
51 1)
52
53
54
55
Fig. IPB 4
) Torque  to  lbf-ft (14 to 16 Nm).
Fig. IPB 5
Piston assembly for model 86810
) Torque  to  lbf-ft (156 to 170 Nm).


Parts list
Item Description Quantity
Model 
 in (254 mm)
Model 
 in (203 mm)
Model 
 in (152 mm)
Model 
 1/4in (107 mm)
Model 
 in (76 mm)
Piston rod assembly      
O-ring piston (Nitrile)   )  )  ) N/A N/A
Seal, piston N/A N/A N/A  )  )
Tie rod   N/A N/A N/A N/A
 Coupler      
 Nipple      
Upper casting      
Tie bolts N/A    
 Nut   N/A N/A N/A N/A
 Gasket   )  )  )  )  )
 Screw      
 Cap, valve      
 Bumper, valve   )  )  )  )  )
 Spool, valve   )  )  )  )  )
 O-ring (Nitrile)   )  )  )  )  )
 Screw (1/4- × 1/4in)      
 Body, valve   )  )  )  )  )
 Cap, valve      
 Screw      
 Gasket   )  )  )  )  )
 Screw (1/4- × 1/2in)      
 Muffler body      
 End element   )  )  )  )  )
 Screw, self tapping (-)      
 Muffler plate      
 Relay valve      
 O-ring (Nitrile)   )  )  )  )  )
 Screw ( - ×  in)      
 O-ring (Nitrile)   )  )  )  )  )
 Bracket, upper      
 Screw (1/4- × 7/8in)      
 Air signal valve      
 Bracket, lower      
 O-ring (Nitrile)   )  )  )  )  )
 Pilot bar      
 O-ring (Nitrile)   )  )  )  )  )
 Screw (-)      
 Muffler element   )  )  )  )  )
 O-ring (Nitrile)   )  )  )  )  )
 O-ring (Nitrile)   )  )  )  )  )
 O-ring (Nitrile)   )  )  )  )  )
 Air tube      
 Seal, cylinder (Nitrile)   )  )  )  )  )
 Lower casting      
 Adapter  N/A N/A N/A  
 Rod bearing      
 Nut (1/2-)      
 Connecting rod      
 U cup (Nitrile)   )  )  )  )  )
 Cylinder tube      
 Screw   N/A N/A N/A N/A
 Washer   N/A N/A N/A N/A
 Piston   N/A N/A N/A N/A
 O-ring (Nitrile)   ) N/A N/A N/A N/A
 Piston rod   N/A N/A N/A N/A
) Included in cylinder tube soft parts kit.
) Included in muffler element kit.
) Included in soft parts kit for pilot bar subassembly.
) Included in soft parts kit for power valve subassembly.
) Included in power valve spool and body kit.


Series III air motor kits*
Used on model Description Kit number
 Cylinder tube soft parts kit 
 Cylinder tube soft parts kit 
 Cylinder tube soft parts kit 
 Cylinder tube soft parts kit 
 Cylinder tube soft parts kit 
All series III air motors Power valve soft parts kit 
All series III air motors Pilot bar soft parts kit 
All series III air motors Muffler element kit 
NOTE: Complete overhaul requires use of the appropriate cylinder tube soft parts kit, plus all three of the common kits (power valve,
pilot bar and muffler element) listed.
Series III air motor assemblies*
Used on model Description Kit number
All series III air motors Air signal valve 
 Pilot bar subassembly 
 Pilot bar subassembly 
 Pilot bar subassembly 
 Pilot bar subassembly 
All series III air motors Relay valve 
All series III air motors Muffler with gasket 
 Power valve subassembly 
 Power valve subassembly 
All series III air motors Power valve spool and body 
 Power valve subassembly 
 Power valve subassembly 
 Power valve subassembly 
 Pilot bar subassembly 
*Indicates change.


Troubleshooting
Problem Possible cause Solution
Air motor is not working and air is
coming from exhaust.
Restricted or inadequate air supply. Check air supply and adjust to minimum
recommended level. Check air supply hose
diameter and change it to minimum
recommended size (see specifications).
Check size of FRL and Quick disconnect
coupling. Replace if small size or restricted.
Erratic or accelerated operation
with short stroking.
Dirty or damaged relay valve (26) or
air signal valve (32).
Check valves and clean if necessary.
Replace any damaged seals or worn parts.
