Harrington Hoists and Cranes (N)ER Hoist - ((N)ER1) - Manual (Page 32)

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1) Bend the tab of the Lock Washer away from the Adjusting Nut so that the Adjusting Nut can be rotated.
2)
Using a spanner wrench and a feeler gauge, rotate the Adjusting Nut to attain the proper Brake Gap
per
Table 6-4 .
3)
After the Brake Gap is set, secure the Adjusting Nut by bending one of the tabs of the Lock Washer into
a slot in the Adjusting Nut. If necessary rotate the Adjusting Nut clockwise (tightening) to line up the tab
with the slot.
4)
If the proper brake adjustment cannot be achieved, disassemble the motor brake and inspect all motor
brake parts. Replace the Brake Drum and/or Motor Cover if necessary.
Table 6-4 Motor Brake Gap
Capacity Code
Brake Gap (G)
inch (mm)
001H, 003S, 005L, 003H, 005S,
010L, 010M, 010S, 015S, 020L, 020M, 030C
0.020 (0.5)
020S, 025S, 030L, 030S, 050L 0.032 (0.8)
6.3.4 Brake Lining Inspection –The brake lining is designed for a long life and should provide years of
trouble-free service. If the brake lining is being inspected due to excessive load chain drift during
operation (see
Section 5.7 ), disassemble the motor brake and inspect all motor brake parts. Braking
surfaces should be clean, free of grease/oil and should not be glazed. Replace the Brake Drum and/or
Motor Cover if necessary. For normal inspections, the Brake Lining and Motor Cover wear should be
measured as follows.
1) Adjust the Brake Gap per Section 6.3.3 before measuring the Brake Lining and Motor Cover wear.
2)
Refer to Table 5-6.
3) Measure the distance "A" using calipers and a straight edge. Place the straight edge across the edge
of the motor cover and measure from the straight edge to the face of the Pull Rotor.
4)
Compare the measurement with the values listed in Table 5-6. Replace the Brake Drum and/or Motor
Cover if the "A" measurement is smaller than the discard limit.