Stahl ST Series Manual

ST Chain hoists_
Operating and Maintenance Instructions

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Fundamental information
You have purchased a product manufactured by STAHL CraneSystems GmbH.
This chain hoist has been constructed in compliance with the applicable standards
and regulations.
Inspect hoist for damage caused in transit immediately upon delivery.
Report damage caused in transit and after consulting the manufacturer/supplier
repair or have repaired before installation and commissioning.
Do not install or commission a damaged hoist!
- Assembly
- installation
- commissioning
-tests
- maintenance and elimination of faults
may only be carried out by a qualified person
Terms employed
User
Whoever uses and employs the chain hoist or has it operated by suitable trained per-
sonnel is considered to be the user (employer/company).
Trained personnel
Trained personnel are persons who have been instructed and trained in the duties
with which they are entrusted and the risks which may arise from incorrect
behaviour, have been advised on the necessary protective devices, precautions,
applicable regulations, accident prevention regulations and prevailing conditions
and have proven their ability.
Skilled electrician
A skilled electrician possesses knowledge and experience on electrical equipment
arising from specialist training and, with knowledge of the applicable standards and
regulations, is able to assess the work with which he is entrusted and detect and
avoid possible risks.
Definition of a qualified person:
A qualified person is one with the necessary qualification, based on theoretical and
practical knowledge of hoists, for the required activities as listed in the operating
instructions.
The person must be in a position to assess the safety of the installation in
conjunction with the application.
Persons with the authority to undertake certain maintenance work on our products
include service engineers of manufacturer and trained fitters with the corresponding
certification.
Seminars:
Comprehensive understanding of material handling products is a prerequisite for the
correct use of equipment. Competent and practically oriented, we impart the special-
ist knowledge required for the correct use, monitoring and care of your installation.
Ask for our seminar programme.
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Table of contents
1 Safety instructions 1.1 Symbols ..........................................................................................................................4
1.2 Operating instructions..................................................................................................4
1.3 Use for intended purpose............................................................................................5
1.4 Safety-conscious operation........................................................................................5
1.5 Organisational safety precautions.............................................................................6
1.6 Eletrical equipment.......................................................................................................6
1.7 Warranty.........................................................................................................................6
1.8 Periodic tests.................................................................................................................6
2 Getting to know the chain hoist ....................................................................................................................................................7
3 Installing 3.1 Installing stationary chain hoist .................................................................................8
3.2 Installing trolley.............................................................................................................8
3.3 Installing trolley on chain hoist ..................................................................................9
3.4 Connecting electric trolley........................................................................................11
3.5 Runway endstop .........................................................................................................11
3.7 Fitting the chain box ...................................................................................................11
3.8 Fitting the control pendant ........................................................................................12
3.9 Checking screw connections ...................................................................................12
3.10 Mains connection.......................................................................................................12
3.11 Dismantling ..................................................................................................................12
4 Commissioning 4.1 Checklist for commissioning .....................................................................................13
5 Operating 5.1 Duties of crane operator ...........................................................................................14
5.2 Operating control pendant........................................................................................15
5.3 Emergency stop ..........................................................................................................15
6 Maintenance 6.1 Maintenance work .....................................................................................................16
6.2 Maintenance intervals...............................................................................................16
6.3 Hook ..............................................................................................................................17
6.4 Load chain....................................................................................................................17
6.5 Checking function of slipping clutch .......................................................................18
6.6 Adjusting slipping clutch ...........................................................................................18
6.7 Hoist motor brake .......................................................................................................20
6.8 Oil change ....................................................................................................................20
6.9 Travel motor brake......................................................................................................21
6.10 Oil change ....................................................................................................................21
6.11 General overhaul ........................................................................................................21
6.12 Trolley............................................................................................................................21
6.13 Operating hours counter (optional) .........................................................................21
7 Repairs 7.1 Chain drive ...................................................................................................................22
8 Wearing parts 8.1 Hoist ..............................................................................................................................24
8.2 Trolley............................................................................................................................24
9 Technical data 9.1 Classification in acc. with FEM ................................................................................25
9.2 Ambient conditions.....................................................................................................25
9.3 Hoist motor data..........................................................................................................26
9.4 Travel motor data ........................................................................................................27
9.5 Specifications for mains connection.......................................................................28
9.6 Lubricants.....................................................................................................................30
9.7 Sound level...................................................................................................................31
9.8 Chain certificate..........................................................................................................31
Subject to alterations
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1 Safety instructions
1.1 Symbols In these operating instructions, the following symbols indicate particularly important
information on risks and safety in operation.
Safety at work
This symbol marks all information on safety at work where risks to life and limb are
entailed.
Warning of electrical voltage
Covers such as hoods and caps which are marked with this symbol may only be
opened by "qualified persons or suitably instructed personnel".
Warning of suspended load
It is forbidden for persons to stand under suspended loads. This entails risks to life
and limb!
Safety in operation
Information marked with this symbol must be observed to avoid damage to the chain
hoist or the goods transported.
1.2 Operating instructions Read carefully and follow the operating instructions
In these operating instructions, these symbols mark particularly important infor-
mation on risks and safety in operation.
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1 Safety instructions
1.3 Use for intended purpose • Chain hoists are intended for lifting freely movable and guided loads that cannot
tilt. Depending on their design, they are for stationary or mobile use. If loads are to
be towed horizontally, or in the case of guided loads, automatic operation,
continuous deadweight or constantly repeated hoisting motions, the individual
application must be assessed. Contact the manufacturer in case of doubt.
• If the hoist forms "part of a machine," the person placing it on the market must
ensure that the hoist meets the specific regulations of the application.
• Runways, suspensions and endstops must be of suitable dimensions.
• Do not carry out any alterations or modifications. Additional fitments must be
authorised by the manufacturer. The declaration of conformity may be invalidated.
• Load chain hoist only up to the permissible safe working load, following the data on
the rating plate. (Caution: danger of load falling)
Not permitted are for example:
- Exceeding the safe working load
- Transporting persons
- Pulling loads at an angle
- Pulling loads loose, dragging or towing loads
- Manipulating the slipping clutch
- Operating the hoist with slack chain
- Touching the chain during the hoisting motion
- Operating a damaged hoist
- Operating the hoist with the chain twisted
- Approaching the emergency limit switch in normal operation
- Operating the chain hoist without a phase monitoring relay if the control pro-vided
by the customer is not installed in the terminal box on the chain hoist, but for
example in a stationary control cabinet.
1.4 Safety-conscious operation The ST chain hoists are constructed according to the state of the art and equipped
with a slipping clutch as overload protection. In spite of this, dangers may arise from
incorrect use or use for an unintended purpose.
• The operator, see page 2, is responsible for ensuring that work is carried out with
safety in mind and avoiding risks. (EC directive 99/92/EC, Decree on Safety at Work)
• Read the operating instructions before starting to work with the chain hoist.
• Observe the "Duties of crane operator", see page14.
• Before starting work, find out where the EMERGENCY STOP button is (usually in
the control pendant).
•Do not place your hand between edges which may pinch or cut. Seesketch
• Do not use the emergency limit switch (ultimate limit switch for highest and lowest
hook position) as an operational limit switch.
• Report damage and defects to the chain hoist (abnormal noises, impaired braking
function, deformations, ...) to the person responsible immediately. Do not use the
chain hoist until the faults have been eliminated.
• Do not remove information plates from the chain hoist. Replace illegible or
damaged plates.
• Have hoist inspected by the relevant authority before commissioning.
1.5 Organisational safety precautions • Only direct persons to operate the hoist if they have been trained or instructed in
its use. Observe the legal minimum age!
• At regular intervals, check that work is being carried out in a safety-conscious
manner.
•
Observe the intervals specified for periodic tests. File the test reports in the test logbook.
• Store the operating instructions within easy reach where the chain hoist is
operated.
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1 Safety instructions
1.6 Electrical equipment Chain hoists, models ST05, ST10, ST20, ST30, ST32, ST50 and ST60, can be supplied
with various versions of electrical equipment.
The chain hoist functions with dangerous electrical voltages.
• Disconnect the chain hoist before opening covers marked with this symbol.
• The chain hoist may only be opened by qualified personnel (see page 2) or person-
nel having been instructed.
a) Direct control:
The motor of the chain hoist is switched on and off directly, i.e. without the use of
contactors. Mains voltage and mains current are present in the control pendant. Due
to the limited ampacity of the control pendants, direct control is only available up to
1.6 kW motor output at 400 V, 3 ph, 50 Hz. Direct control is not permissible in various
countries (e.g. Canada, U.S.A.) due to legal stipulations and standards.
b) Contactor control:
The motor of the chain hoist is switched by means of a contactor-transformer combi-
nation.
A safety extra-low voltage is present in the control pendant.
Contactor control is available for all motor sizes and outputs and is accepted world-
wide. The control voltage generated by the transformer is selected corresponding to
customer requirements and national standards. 48 V or 230 V control voltage is gene-
rally used in Europe, 120 V in North America.
c) Version without control:
STAHL chain hoists are available without control. The switchgear (e.g. contactors
and transformer) are then not supplied. The rectifier for activating the brake remains
part of the supply.
Safety note: if the hoist is supplied without control, it is recommended that the custo-
mer install a phase monitoring relay. If the control is not installed in the terminal box
on the chain hoist, but in a control cabinet for example, a phase monitoring relay is
obligatory.
If the control is supplied by others, or work carried out on the control, the braking
function must be tested.
1.7 Warranty • The warranty will become invalid if these operating instructions are not observed
for installation, operation, inspection and maintenance.
• Repairs and elimination of faults within the scope of the warranty may only be per-
formed by qualified personnel (see page 2) after the manufacturer/supplier has
been consulted and has given his approval.
The warranty will become invalid if the hoist is modified or original spare parts not
used.
1.8 Periodic tests Hoists and cranes must be inspected by a qualified person, see page 2, at least once
a year. The results of the test must be recorded and filed in the test log book.
The remaining service life of the hoist acc. to FEM 9.755 must also be established
during this inspection.
The periodic tests must be adapted to the hoist’s use. Intensive use entails shorter
maintenance intervals.
All tests must be initiated by the user, see page 2.
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2 Getting to know the chain hoist
1 Chain drive
2 Motor
3 Gear
4 Slipping clutch
5 Brake
6 Panel box
7 Chain box
8 Plug for control pendant
9 Plug for travel drive
10 Plug for mains connection
11 Socket for control pendant
12 Socket for travel drive
13 Socket for mains connection
14 Suspension hook
15 Suspension eye
16 Bottom hook block, single fall
17 Load hook
18 Bottom hook block, 2-fall
19 Control pendant
20 Emergency off
Some illustrations include options
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3 Installation
3.1 Installing stationary chain hoist Note installation position of suspension eye or suspension hook nsketch!
(Tightening torque ST05 see page12)
3.2 Installing trolley 3.2.1 Adjusting trolley to runway flange
1. Adjust play of wheel flanges, see sketch and table
2. Tighten nut with specified torque, see page12
3. Fit screw retentions.
Suspend the chain hoist in the centre of the trolley.
Grease wheel gearing.
Use only original spare parts for modifying the flange width.
ST05 ST10 - ST60
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3 Installation
3.3 Installing trolley on chain hoist 1. US-G 10 with ST05
Always suspend chain hoist from centre of trolley. Seesketch, page 8
US-G 10 with ST10
Fit suspension piece with suspension bolt (a) to chain hoist. Note installation
position of suspension piece. Lock bolt (a) with washer (b) and cheese-head
screw (c). Seesketch
KFN 10/32 with ST10/ST20-ST32; ST50 /ST60 1/1
Fit suspension piece with suspension bolt (a) to chain hoist. Note installation
position of suspension piece. Lock bolt (a) with locking plate (b) and cheese-head
screw (c). Seesketch
2. Slide trolley onto runway or push on from below after swivelling the side cheeks
up.
3. Check that screws and nuts are tightened with specified torque, see page12.
4. The screw retentions must be fitted!
US-G10 with ST05 1/1 ... 2/1 US-G10 with ST10 1/1
KFN10/32 1/1 KFN10/32 2/1
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3 Installation
3.3 Installing trolley on chain hoist
(continued)
1. KFN 63
Fit suspension piece with suspension bolt (a) to chain hoist. Observe installation
position of suspension piece for 1/1 and 2/1 reeving! Lock bolt (a) with washer (b)
and circlip (c). See sketch
2. Slide trolley onto runway or push on from below after swivelling the side cheeks
up.
3. Check that screws and nuts are tightened with specified torque, see page12.
4. The screw retentions must be fitted!
KFK ..
5. Turn wheel (d) by means of cam (e) until it is in contact with the running surface of
the runway.
Tighten screw (f).
N.B.: The guide roller must be flush with the wheels.
a
b
c
fe
d
d
W0761
KFN 63 2/1
KFK ..
KE-T 22
Wheel Max. S.W.L.
[kg]
50 500
63 500 (KE-T)
63 1000
80 3200
125 6300
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3 Installation
09.07
3.4 Connecting electric trolley Plug connection cable into chain hoist and secure.
3.5 Fitting guide rollers
3.6 Runway endstop
3.7 Fitting and securing chain box
Lubricate chain with the chain lubricant supplied!
Chain box must be able to move freely.
Max. length of chain see sticker on chain box.
KFN / KFK 10/ 32: B t260
KFN / KFK 63 B: t300
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3 Installation
3.8 Fitting control pendant N.B.:
The control pendant must be suspended from from the strain relief wire and not from
the cable!
Ensure sufficient clearance of the cable to the chain by turning the plug if necessary
(±360°)! The cable must not touch the chain.
1. Plug in and secure cable.
2. Fit strain relief wire.
If the customer connects the control cable by means of a plug kit, the circuit diagram
must be followed (parts marked "A" are supplied loose).
Prepare ends of cable acc. to sketch "Mains connection, plug-type".
For connecting control pendant without plug, see circuit diagram supplied. (Terminal
strip X1, terminals 1...9. Connection is via a cable gland.)
3.9 Checking screw connections
• Chain guide attachment
• Distance bolt on trolley
• Trolley suspension
*1 Self-locking/self-tapping screws (ST05)
*2 Plug connection
*3 Cable gland (in plastic)
3.10Netzanschluss herstellen
Safety note
The chain hoist may only be connected by a skilled electrician.
The mains cable must meet the specifications given in the technical data, see page
28.
3.11Dismantling Dismantling chain hoist
1. Remove load from hoist
2. Disconnect chain hoist from mains at main isolator
3. Disconnect electrical connections
4. Remove chain hoist
5. Remove trolley, if any
6. Clean chain hoist and oil lightly
7. Seal air vent screw in gear.
M.. [Nm] M.. [Nm]
M5
M5*1
M5*2
M5*3
M6
M8
M8*1
M10
M12
6
5
1,0
1,5
10
24
15
48
83
M16
M20
M20x1,5
M24
M30
M36
120
300
300
320
640
1100
Mains connection with cable glandPlug-in mains connection
123
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4 Commissioning
The test before first commissioning must be carried out by a qualified person, see
page 2.
This applies for all chain hoists with electric trolley.
An exception is made for chain hoists with an S.W.L. <1000 kg with push trolley or in
stationary design.* (Monorail with push trolley, or stationary attachment.)
The following test steps must also be performed when recommissioning after a
period in storage or stoppage.
4.1 Checklist for commissioning Test steps
• Remove sticker from air vent screw in gear
• Check suspension hook or suspension (visual inspection)
• Check tightening torque of screw connections on hooks
• Check load chain
- clean and oiled
- must not be twisted on 2-fall reeving
• Check chain box
- attachment
• Attach chain stopper to chain with hook at floor level and check chain anchorage
• Measure and record hook aperture
• Check electrical connection
• Check runway
- clean, free of grease and paint, even
- end stops present
• Check tightening torque of screw connections of suspension piece or trolley sus-
pension.
• Open step of travel drive clean and greased.
During the following test steps, you must be able to activate the emergency off but-
ton at all times.
• Check function of chain hoist
• - Direction of movement must correspond to the symbols on the control pendant.
If not, reverse two phases of the mains connection. (Do not open manufacturer’s
control.)
• Check function of slipping clutch without load, see page 18, after a long standstill
the coupling moment may have altered.
• Check function of brake, see page 20
• Check function of travel drive
- Direction of motion must correspond to the symbols on the control pendant.
- Check function of brake, see page 20.
• Check function of overload protection (slipping clutch, see page 18)
• Confirm correct commissioning in test logbook.
If required by national regulations, have chain hoist tested before commissioning by
a safety organisation (e.g. TÜV).
*The above exceptions do not apply if the chain hoist is operated on a crane!
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5 Operating chain hoist
5.1 Duties of crane operator When working with chain hoists, the following must be observed:
• Every day before starting work, check brakes, load suspension devices and limit
switches and inspect the installation for any visible defects.
• No-one must stand within the danger area of the moving load.
• Do not move loads above people.
• The crane operator must be able to see the whole of the working area. If this is not
the case, an assistant must guide the operator.
• Loads must be attached safely and correctly, do not leave suspended loads unat-
tended. Control and emergency stop devices must be within easy reach.
•Donot place your hand between edges which may pinch or cut.
• If the chain should become slack, tauten it at slow speed before lifting.
• The slipping clutch is a safety device.
• It must not be activated during normal operation.
• Approach the final positions for lifting, lowering and travelling in normal operation
only if an operational limit switch is fitted.
• As far as possible, avoid inching operation (briefly switching on the motor to
achieve small movements.) This could damage switchgear and motors.
• Do not move in the opposite direction until the hoist has come to a stop.
• Observe the safety instructions, see page 4, 5.
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5 Operating chain hoist
5.2 Operating from control pendant
Safety note
If the rocker switch is no longer depressed by the operator, it returns to the 0 posi-
tion, the hoist motion is automatically stopped (dead man’s control).
If the hoist malfunctions, e.g. the actual motion does not correspond to the motion
intended in activating the rocker switch, release the rocker switch immediately. If the
motion continues, press the emergency stop button.
5.3 Emergency stop Every hoist must have a means of disconnecting the power supply to all drives under
load from the ground.
After an emergency stop, the operator must not restart the hoist /crane system until a
qualified person has determined that the fault which led to this function being activa-
ted has been eliminated and no danger can arise from the continued operation of the
system.
• The emergency stop button is on the control pendant.
• Press emergency stop, the system comes to a halt.
• To release the emergency stop: turn the button in the direction shown.
2-step
1st step: slow
2nd step: fast
1st step: slow
2nd step: fast
1st step: slow
Long travel: right/left
Cross travel: right/left
Lifting/lowering::
2nd step: fast
Emergency stop
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6 Maintenance
6.1 Maintenance work Maintenance work on the chain hoist may only be carried out by qualified persons.
Maintenance work beyond that described in these operating instructions may only
be carried out by the manufacturer or trained after-sales service personnel.
The maintenance intervals below apply to the corresponding mechanism groups in
accordance with FEM 9.511. If the chain hoist is operated in the FEM group specified
by the manufacurer, the correction factors listed below must be applied for quarterly
and annual maintenance work.
.
Example: Check hook attachment
1 Bm 1 x per quarter
2 m 4 x per quarter
6.2 Maintenance intervals 6.2.1 Every day
• Check correct functioning of brake(s).
• Check load chain (visual inspection)
- clean, lubicated and not twisted
• Check bottom hook block (visual inspection)
6.2.2 Every month
• Check suspension of control pendant (cable and strain relief wire must be fitted).
• Check load chain for wear, see page 17
6.2.3 Every three months
• Check hook for wear, see page 17
• Check hook attachment
• Grease output pinion and open step of gearing on electric trolley
• Check attachment of rigid suspension or trolley suspension
• Clean and lubricate chain
• Check chain attachment (2/1 suspension bolt)
6.2.4 Every year
• Check screw connections (tightening torques, corrosion)
• Adjust brake
• Adjust slipping clutch; function of limit switch is also tested when allowing clutch
to slip under overload
• Calculate service life expired. Read operating hours counter if any.
• Check chain stopper (visual inspection)
6.2.5 Every five years
• Gear oil
Change oil, see "Oil change" page 21
6.2.6 Safety note
Periodic inspections including maintenance every 12 months, possibly earlier if so
prescribed by national regulations, to be performed by a fitter engaged by the manu-
facturer. Similarly, heavy-duty applications (e.g. multi-shift operation..) or adverse
conditions (dirt, solvents) necessitate shortening the inspection and maintenance
intervals
1Bm 1Am 2m 4m Mechanism group (operation)
1 1 2 4 Correction factor
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6 Maintenance
6.3 Checking hook for wear - DIN 15405 part 1
Check load hook or suspension hook for wear. The hook dimensions must not exceed
those specified in the following table.
If load hook or suspension hook should display distortion, breaks, cracks or corro-
sion impair the lifting capacity they must be replaced.
N.B.:
Hook safety latch must close automatically, replace if necessary.
6.4 Checking and lubricating load
chain
- DIN 685 part 5
• Operate chain hoist under load. If any loud cracking sounds can be heard, check
chain, chain sprocket and return sheaves for lubrication and wear.
• Check chain dimensions, measure chain length over 11 links. The chain dimen-
sions must not exceed the values given in the table below.
• The load chain must be replaced immediately if it displays distortion, breaks,
cracks or corrosion, see page 22
N.B.:
Lubricate the load chain above all at the joints.
• Check chain guide, chain sprocket and idler sheave on the bottom hook block and
replace if necessary, see page 22
• Check chain anchorage, replace if necessary.
Caution: Do not turn and refit a used chain suspension bolt!
ST05 ST10 ST20 ST30 ST32 ST50/ST60
1/1 2/1 1/1 2/1 1/1 2/1 1/1 2/1 1/1 2/1 1/1 2/1
[mm] [mm] [mm] [mm] [mm] [mm]
Load hook
h 192419242431313731403748
h min. 18 22,8 18 22,8 22,8 29,5 29,5 35,2 29,5 38 35,2 45,6
z 2229,52229,529,530 30 33 30 35 33 41
z max. 24,2 32,5 24,2 32,5 32,5 33 33 36,3 33 38,5 36,5 45,1
Suspension
hook
h 242424243737373739,539,539,539,5
h min. 22,8 22,8 22,8 22,8 35,1 35,1 35,1 35,1 37,5 37,5 37,5 37,5
z 29,5 29,5 31,5 31,5 41 41 41 41 42 42 42 42
z max. 32,5 32,5 34,6 34,6 45,1 45,1 45,1 45,1 46,2 46,2 46,2 46,2
ST05 ST10 ST20 ST30 ST32 ST50/ST60
[mm] [mm] [mm] [mm] [mm] [mm]
dxt 4x12 5x16 7x21,9 9x27 9x27 11,3x31
d min 3,6 4,5 6,3 8,1 8,1 10,2
t max 12,5 16,8 23 28,3 28,3 32,5
11 t max 134,4 179,66 245,92 303,18 303,18 350,37
Chain gauge (part no. 14 320 00 65 0)
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6 Maintenance
6.5 Checking function of slipping
clutch - without load!
1. Without load, run bottom hook block to top or bottom hook position.
2. Allow slipping clutch to slip in top or bottom hook position for a maximum of 3 sec.
The chain must not move, the motor must rotate.
N.B. Slipping clutches and brakes may only be adjusted by a qualified person. When star-
ting to adjust the slipping clutch, the chain drive must be off-loaded!
The motor must be at a standstill during all work on the slipping clutch! There is a risk
of accidents, we recommend contacting our after-sales service.Before adjustment,
the function of the slipping clutch must be checked (see 6.5).
6.6 Adjusting slipping clutch
- without load
The slipping clutch can be tested easily with the FMD1 slipping clutch testing device,
and adjusted if required without any danger to the structural steelwork.
125% of nominal capacity is the specified value for the slipping clutch.
The function of the chain hoist must be tested with nominal load at least once a year.
Adjusting the slipping clutch with this testing device does not replace this test!
6.7 Adjusting slipping clutch with
test load
Adjusting the slipping clutch with a test load may only be performed by a qualified
person. Before starting, it must be ensured that the entire suspension structure (such
as crane, crane runway, crane runway suspensions right up to the roof of the buil-
ding, etc.) can support the increased load on the chain hoist.
Due to the polygon effect, oscillations and tolerances of the friction linings, in accor-
dance with FEM adjustment values between min. 110% and max. 160% of nominal
load are permissible for chain hoists.
If necessary, take the chain hoist down and carry out adjustment on a test stand. The
slipping clutch is factory set to 125% nominal load.
Before adjustment, the function of the slipping clutch must be checked. It is forbid-
den to hoist test load to top hook position and activate the slipping clutch. The test
load may be lifted by a maximum of 300 mm.
• In bottom hook position attach 1.25 x rated load (test load).
• Remove cover (1).
• A small amount of gear oil may escape when the cover is removed (n/a for ST05)
• Bend back locking plate (2) (ST05).
• Release slipping clutch setting with clamping screw (2a) (ST32/ST50/ST60)
• Adjust slipping clutch by turning the adjusting screw or nut (3).
• Turning to the right othe reaction force increases
• Turning to the left othe reaction force decreases
If the reaction force is too high, the adjusting screw or nut must be loosened by one
turn.
• Adjust slipping clutch so that the test load is just lifted. The rated load must be held
firmly in every position.
• Bend locking plate (2) up over 2 surfaces of the adjusting screw (ST05).
• Lock slipping clutch setting with clamping screw (2a) (ST32/ST50/ST60)
• Replace cover (1) and gasket.
ST 05: if no further adjustment is possible, replace clutch
ST 10 - ST 60: non-wearing lining
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6 Maintenance
ST05 ST10/ST 20/ST 30 ST32/ ST50/ST60
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6 Maintenance
6.8 Hoist motor brake Check brake at regular intervals
6.8.1 Checking brake
1. Attach rated load
2. Activate brake during lifting and lowering.
Slowing-down paths of up to 10 cm are permissible.
ST05
• Measure distance between fan cover and motor shaft
1. with motor standing still
2. with motor running
The brake displacement is the difference between these two values. If value (S) is
greater than 1.5 mm, the brake must be adjusted. Nominal dimension: 1±0.25 mm.
ST10 - ST60
1. Remove fan cover (1)
2. Remove plug (8)
3. Measure air gap (S) with feeler gauge (F). See table for max. permissible air gap
(S). If the max. permissible air gap (S) has been reached, the brake must be
replaced
• Clean brake (wear a dust protection mask!)
• Check friction surfaces for wear
6.8.2 Adjusting brake
ST05
• Set load down.
Calculate number of shims to be removed. The brake displacement is altered by
0.5 mm per shim.
Example:
Brake displacement measured: 0.8 mm
Remove 2 shims: -1.0 mm
New brake displacement: 0.8 mm
• Lever off cover (1) with a screwdriver.
• Remove 4 screws (2).
• Pull off brake flange (3).
• Remove number of shims (4) calculated.
• Push on brake flange.
• Reassemble in reverse order.
• Check brake displacement.
Replace brake/slipping clutch unit if all shims have been removed.
Then reset brake displacement.
Caution: After working on brake, always perform a functional test with rated load.
Hoist motor type S max.
[mm]
./.E.. 1
./.E..-MF 0,6
09.07