7
Inspection and maintenance
34
01.2019
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7.4
Adjusting slipping clutch with test load
WARNING
Danger of bodily injury
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 building, etc.) can
support the increased load on the chain hoist.
Due to the polygon effect, oscillations and tolerances of the friction linings, in accordance
with EN 14492-2 adjustment values between min. 110% and max. 160% of maximum
working 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%+15% maximum working load.
WARNING
Danger of bodily injury
It is forbidden 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 a test load of 1.25 x maximum working 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
the reaction force increases
•
Turning to the left
the 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 test 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
Summary of Contents for ST05
Page 1: ...Chain Hoists Original instructions ...
Page 2: ......