Harrington Hoists and Cranes (N)ER Hoist - ((N)ER1) - Manual (Page 31)

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ƒ Change gear oil at least once every 5 years. The oil should be changed more frequently
depending on the hoist's usage and operating environment. Refer to Section 6.1 .
ƒ Refer to Figure 3-1 and Table 3-1 to change the gear oil, remove both fill and drain plugs and allow
the old oil drain completely. Replace the drain plug and refill the gear case with the correct quantity
of new oil or until the oil level is within the range shown in
Table 6-3 .
ƒ
NOTICE
Dispose of the used oil in accordance with local regulations.
6.3 Motor Brake
6.3.1 To keep your hoist working in optimum condition and prevent possible down time, it is recommended to
check your motor brake lining and adjustment at regular intervals.
6.3.2 Motor Brake Unit Removal - Adjustment and inspection of the motor brake requires removal of the
motor brake unit from the hoist as an assembly.
1)
CAUTION
Before proceeding disconnect the power supply and make sure the hoist is
unloaded. To keep the load chain from moving secure it by tying together the load and no-load sides
directly under the hoist using a cord or wire.
2) Refer to Figure 6-3 .
3)
Remove the four Fan Cover bolts (A), Fan Cover (B), Fan snap ring (C), and Fan washer (D).
4) Pull the Fan (E) off the motor shaft using a wheel puller if necessary.
5) Remove the four Motor Cover Assembly bolts (F) and carefully pull the motor brake unit (G) out of the
hoist.
A
B
C
D
E
F
G
Figure 6-3 Motor Brake
6.3.3 Brake Gap (G) - The Brake Gap should be measured between the Brake Drum and Pull Rotor.
Adjustment of the Brake Gap is accomplished by turning the Adjustment Nut in the center of the Motor
Cover as shown in the figure with
Table 6-4 . Do this as follows: