Trolley Motor Brake - Harrington Hoists RHN02D-20A-20D Series Owner's Manual

6.3.5 Motor Brake Re-assembly – Reassemble the parts in reverse order of removal. Ensure that the check
hole for measuring the air gap is underneath. Observe tightening torques in
6.4

Trolley Motor Brake

6.4.1 To keep your hoist working in optimum condition and prevent possible down time, it is recommended to check
your motor brake at regular intervals. Intervals must be adapted in accordance with the

6.4.2
de-energized (disconnected). Lock out and tag out in accordance with ANSI Z244.1 "Personnel
Protection –Lockout/Tagout of Energy Sources".
6.4.3 Motor brake Check - See
1) Move carriage into a safe position
2) Remove fan cover (1)
3) Remove plug (2)
4) Measure air gap (S) with feeler gauge (F). See
5) The travel motor brake needs no adjustment. If the max. permissible air gap (S) has been reached,
the brake disc (brake rotor) must be replaced.
6.4.4 Brake Rotor Replacement - See
1) Remove fan cover (1)
2) Pull off fan wheel (3), remove feather key
3) Disconnect brake
4) Unscrew fixing screws (4)
5) Remove magnet piece (5) together with armature disc (6)
6) Remove brake disc (brake rotor) (7).
Before proceeding, ensure that the electrical supply for the hoist or trolley has been
Figure 6-3.
Figure 6-3.
Table 5-11 for max. permissible air gap (S).
56
Table 5-8.
application.