LIFTKET Hoffmann Electric Chain Hoist 090/51

Loosen the screws of the cap for gear cover.

Loosen the three fastening screws of brake unit.

Fit new brake unit onto the motor shaft.

Check if the brake stops the load after approx. two chain braking link lengths in a jerking manner.

Check all screws, hold down, chain guide, twisted chain, and safety devices

Check the condition of the electric cable, power cable, and pendant control

Check the condition of the trolleys and wheels

Lubricate the load chain with penetrating gear lubricant oil before starting operation for the first time.

Lubricate the load chain with penetrating gear lubricant oil during operation with no load.

Clean the links of the load chain before subsequent lubrication.

Select the type of dry-film lubricant to use when ambient influences are conducive to wear

Describe the frequency of use and operating conditions affecting lubrication needs.

Adjustment of the Sliding Clutch

Ensure only a trained or competent person performs the adjustment

Apply the test load (1.1 times the nominal/rated load) onto the load hook or clutch testing device

Switch on the chain hoist and check if the test load can be lifted or if the clutch testing device shows approximately 1.3 times the nominal load

Lower the test load to the floor

Adjust clutch torque until the test load is just lifted or the clutch testing device shows the required value

Verify that the sliding clutch is set with the test load by the manufacturer

Ensure no reset of the clutch is needed after changing or replacing the lift motor

Check the original distance between the end of the tension rod and the pressure plate of the coupling marked on a tag on the brake coil

Inspect hooks for deformation and cracks

Is the chain sprocket in the hook block worn by about 1 mm?

Measuring Wear and Replacing Load Hook

Measure length between chisel punch marks (dimension Y)

Check permissible values on hook certificate in inspection book

Check condition of load hook components