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17
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Overhaul procedures
Remarks
6. Remove two friction plates [37], the ratchet disc [38] and the bushing [39] from the
friction disc [36].
7. Unscrew the friction disk [36] from the pinion [17] by turning counterclockwise holding
the end of the pinion with fingers.
8. Remove the snap ring [35] from the pawl pin (on the side plate A) and then remove the
pawl [34] and pawl spring A and B [33].
9. <For 7.5 t and smaller types>
Pull the split pin [24] out from the stopper pin [23] and remove the load chain
[47] and the stopper pin from the anchorage [22].
<For 10t and larger types>
Pull the split pin [52] out from the end pin [51] and remove the load chain [47] and the
end pin.
Unscrew two socket bolts (with the spring washers) fixing the stoppers [114] and
remove stoppers.
10. Remove the load chain [47] from the load sheave [14] by pulling the load chain toward
the bottom hook.
11. Remove the split pin [5] from the top pin [4], then remove the top pin and the top hook
[1] from the side plate A [11] and B [13].
12. Put a hoist with gear case side (or name plate side) up.
13. Unscrew three nuts [31] (with the spring washers [32]) fixing the gear case [29],
remove the gear case from the side plate B [13], and take the ball bearings [28] out
from the gear case.
14. Remove two gear #2 [27] (0.5t has one) from the side plate B [13].
15. Remove the snap ring [26] from the load sheave [14], then the load gear [25] from the
load sheave.
16. Remove the side B [13] from the side plate A [11] and then take the ball bearing [16]
out from the side plate B.
17. Remove the guide rollers [20], load sheave (attached to the pinion [17]), stripper [21]
and anchorage [22] (For 10t and larger types: cross guide [53]) from the side plate A
[11], then remove the ball bearing [15] from the side plate A.
18. Remove the snap ring [19] in the load sheave [14].
19. Remove the pinion [17] and the roller bearing [18] from the load sheave [14].
Hold the load sheave with a hand
and remove the bearing by tapping
the pinion with a wooden hammer.
20. Pull the split pin [10] out from the slotted nut [9] and remove the slotted nut and chain
pin from the bottom hook [6].