Harrington Hoists and Cranes (G)NTH Trolley User Manual

Page 32

5) Pull out split pin [36] from the wheel stopper pin [35] and remove the wheel stopper pin and wheel

stopper [34] from the pinion [14].

6) Remove the hand wheel [33] from the pinion [14] by turning the hand wheel counterclockwise.

NOTE: If the hand wheel is too tight to turn by hand, put hand chain on the hand wheel again and pull
it down hard. It will release the brake.

7) Remove two friction plates [32], ratchet disc [30] and bushing [31] from the friction disc [29].
8) Remove the friction disc [29] from the pinion [14] by turning counterclockwise holding the end of the

pinion with your fingers.

9) Remove snap ring [28] from the pawl pin [24] (on the body A [10]) and then remove pawl [27] and

pawl spring [26].

10) Unscrew the pawl pin [24].

NOTE: The pawl pin is fixed with the U nut [25].

11) Unscrew four socket bolts [22, 22-A] connecting body A [10] and B [11].

NOTE: Four socket bolts are fixed with U nuts [23] on the body B side.

12) Separate the body A [10] and B [11].
13) Take ball bearing A [15] and C [17-A] out of the body A [10] (only if bearing needs replaced).
14) Remove the suspender and top pin [3] from the body B [11].
15) Remove pinion [14], chain guide [20] (or guide rollers [20-A]), stripper [21], tail pin [40], and load

chain [42].

16) Remove the frame [13].
17) Take load sheave [18] out of the load gear [19].
18) Remove the load gear [19].
19) Unscrew tap socket bolt [41] from the body B [11].
20) Pull split pin [9] out of the slotted nut [8] and remove the slotted nut and chain pin [7] from the

bottom hook [4].

6.4

Hoist Assembly

6.4.1





Inspect and replace any worn or damaged parts per Table 5-3.



Secure all nuts, bolts and split pins firmly.



Replace all split pins and retaining rings.

6.4.2

Assembly

1) Wipe off old grease from the body B [11] and frame [13].
2) Apply new grease to the ball bearing B [16] and C [17] on the body B [11].

3) Insert load sheave [18] into the load gear [19] and put them together on the ball bearing C [17].