BAST_
02.FM
18
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
o
the reaction force increases
• Turning to the left
o
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 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
09.07
