Harrington Hoists and Cranes TCR Large Cap - (10-25 Ton) - Manual (Page 17)

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Figure 3-6 Capsized Hook and Chain
3.11.3
WARNING
Confirm the adequacy of the rated capacity for all slings, chains,
wire ropes and all other lifting attachments before use. Inspect all load suspension
members for damage prior to use and replace or repair all damaged parts.
3.11.4
WARNING
Verify that the Chain/Limit Levers are operational and can move
freely in both the up and down directions. For reference see Figure 3-7 .
Figure 3-7 Limit Switch Components – 10 Ton TCR10000C2 and TCR10000P2