Harrington Hoists and Cranes (G)NTH Trolley - Manual (Page 39)

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Table 7-1 Troubleshooting Guide
Symptom Cause Remedy
During operation, hoist
idles or load drifts Poor load sheave and load chain contact
caused by improper chain-reeving.
Reassemble properly and ensure proper
lifting before reuse.
Hoist will not lift all the
way (multiple fall
hoists)
Capsized hook
Reset the capsized hook.
Twisted Chain
Capsized Hook and Chain
Double Fall Models
Hoist does not lift load
smoothly. Improper assembly of gear OR bearing
broken. Disassemble and reassemble gear train
and/or replace bearing.