Adjustment Of The Hoist Brake - Liftket B13 Operating Instructions Manual

10.2.1.3 Adjustment of the hoist brake

The operating air-gap is measured in a current-free state between the anchor plate (2)
and the brake magnet (1). The air-gap was set to 0.3 mm in the manufacturing plant.
NOTE
The air-gap will increase due to wear and tear. If the brake linings are worn so that the
air gap of the brake reaches the maximum permitted value of 0.9 mm, then the brake
must be adjusted as follows:
1. Disconnect the gear from the current.
2. Remove the fan cover (10) after unscrewing the screws.
3. Pull out the dust protection ring (9) from the groove of the brake magnet (1) and pull it over the brake magnet.
4. Use compressed air to blow out the dust generated by the wear and tear.
5. Pull out the O-ring (8) from the groove and push it onto the brake magnet (1) to reveal the air-gap.
Use compressed air again to blow out the dust generated by the wear and tear.
6. Check the combined thickness of the brake disc (3) and the vulcanised brake linings.
If the combined thickness of the brake disc together with the linings does not reach a
NOTE
value of 9.5 mm, then it has to be replaced.
7. Release the hexagonal head screws (6) with a half turn. Not later than after every 2
head screws must be replaced.
8. Screw in the hollow screws (5) into the brake magnet (1) by about 1 mm.
9. Tighten the hexagonal head screws (6) to set the air-gap between the anchor plate (2) and the brake magnet (1)
to 0.3 mm as measured with a clearance gage.
10. Unscrew the hollow screws (5) from the brake magnet (1) until they are leaning up against the motor flange (7).
11. Tighten the hexagonal head screws (6) evenly.
12. Check the size and the evenness of the air-gap using a clearance gage.
The air-gap must be the same everywhere, so carry out the check at several
NOTE
perimeter points.
13. If necessary correct the air-gap as described under points 6-11.
14. Use a torque of 10 Nm to tighten the hexagonal head screws (6). Use a torque wrench.
15. Position the O-ring (8) into the groove between the anchor plate (2) and the brake magnet (1).
16. Push back the dust protection ring (9) and push it into the groove of the brake magnet (1).
17. Connect the flat cable connector.
18. Replace the fan cover and fasten it with the screws.
19. Connect the drive gear.
20. Perform a functional test.
When braking a load corresponding to the nominal load capacity in lowering mode the
CAUTION braking distance should not exceed the length of two chain links, and the brake should
not hold the load with a sudden jerk.
Perform operations 1 – 5, 15 and 16, and 18 – 20 at least once every year, or once
CAUTION
every 50 hours of operation.
42
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adjustment the hexagonal