Columbus McKinnon CM Hoist JJ

Clean the load chain with a non-acid or non-caustic type solvent.

Slack the chain for inspection.

Inspect the chain link-by-link for issues

Is the chain worn beyond serviceable limits?

Measure gage lengths of the load chain as indicated in Figure 15.

Is the chain worn beyond the indicated length?

Inspect hoist components for wear

Ensure the area is clean and free from obstructions

Gather necessary materials: Lubriplate Bar and Chain Oil 10-R or equivalent

Inspect the load chain for dirt and debris

Clean the load chain if necessary

Apply Lubriplate Bar and Chain Oil 10-R to the load chain

Ensure natural run-off and full coverage of the lubricant

Check for visible damage on the hook

Measure the twist angle of the hook

Is the hook excessively opened or showing seat wear?

Does the latch operate properly with sufficient spring pressure?

Load Sustaining Parts Inspection

Inspect other load sustaining parts for damage

Handle and dispose of lubricants as directed in applicable material safety data sheets and in accordance with applicable local, state, and federal regulations.

Ensure the ProtectorTM is operating without service and has not been degreased or disassembled.

If gears are removed, wipe excess grease off the outside ProtectorTM surfaces with a soft cloth.

Degrease the remaining gears and housings if gears are removed.

Add 7 oz. of Century Lubricants HB-11, #3 grease to gears and housing upon reassembly.

Coat the spline on the end of the drive shaft with a molydisulphide lubricant such as 'Super Herculon'.

Apply a light film of machine oil to the limit switch shaft threads.

Check for external evidence of issues

Control functions for proper operation

Load chain for proper reeving and twists

Operation of the control station buttons

Suspension lug or hook for excess free play or rotation

Loose end link, loose end screw and dead end block on double reeved units

Shackle and lug pins for wear on Models RT, RT-2, RRT and RRT-2