Harrington Hoists and Cranes RH Wire Rope Hoist - Manual (Page 56)

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Figure 6-6
6.3.4 Internal Method – The internal method allows the braking to be increased as required.
1) Remove the Lock-Nut (C), Fan (D), Snap Ring (F), Pressure Washer (G), Spring (H) and all
Thickness Washers (E) (see Figure 6-5 and 6-6).
2) Unscrew and remove the Hexagonal Spacers (J) and Nuts then remove the Motor Cover (P).
Carefully, so as not to damage the rotor and/or the winding, slide the Rotor (N) with Brake Block
(K) out of the motor completely (see Figure 6-7).
3) Remove the Snap Ring (L), external Drum Spacers (M), Brake Block (K), without removing the
internal Drum Spacers (M) nearest the rotor. Transfer the necessary quantity of external Drum
Spacers (M) to the Rotor (N) side of the brake block (K) to provide more braking (see Figure 6-8).
4) Reinstall the brake block (K), Drum Spacers (M), Snap Ring (L) and reinsert the rotor in the motor.
Reinstall the Motor Cover (P), Hexagonal Spacers (J) and Nuts (see Figure 6-9).
5) Confirm acceptable trolley braking distance. Perform the steps of Section 6.3.3 External Trolley
Brake Adjustment for further adjustment if necessary.
6.3.5 If the adjustment has been performed several times and the required braking cannot be obtained, it is
necessary to replace the motor cover (P), ordering ONLY original spare parts.
Figure 6-7 Figure 6-8 Figure 6-9