Harrington Hoists and Cranes AHM Hoist - Manual (Page 36)

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7.0 Maintenance and Handling
7.1 Brake
7.1.1 The hoist brake is not adjustable.
7.1.2 Inspect the brake disc in accordance with Section 5.7, Table 5-3.
7.1.3 The following is the hoist brake inspection procedure. Refer to Figure 7-1.
1)

HAZARDOUS AIR PRESSURE IS PRESENT IN THE HOIST, IN THE
SUPPLY OF COMPRESSED AIR TO THE HOIST, AND IN THE CONNECTIONS BETWEEN
COMPONENTS. Shut off the air supply and stop the airflow completely. Lock out and tag out in
accordance with ANSI Z244.1 “Personnel Protection -Lockout/Tagout of Energy Sources”.
2) Gradually and evenly back out 2 Hex Socket Cap Screws (A) from Brake Cover (B) from Gear
Case (J) to slowly decrease spring tension (K) of Brake Piston (D) against Brake Disc (I).
3) Remove Brake Cover (B), Brake Piston (D), Springs (K), and O-Rings from Gear Case (J). Set
parts aside for reassembly.
4)
Remove Retaining Ring (F) on Pinion Shaft (H) adjacent to Brake Disc (I).
5) Remove Brake Disc for inspection and measurement and then remove the Key (G) from the Pinion
Shaft (H). Refer to "Motor Brake" in Table 5-3, "Hoist Inspection Methods and Criteria".
6)
Prior to reassembly, clean all surfaces of debris, dirt and loose paint. Apply a light film of grease to
all O-Ring seals.
7)
Reassemble in reverse order. Torque all mounting hardware evenly during the reassembly
process.
Figure 7-1 Brake Inspection