LIFTKET Hoffmann Electric Chain Hoist 050/51

Document guidelines observed for hoist chains

Remove Old Chain and Components

Press the hold down (3) out using a screwdriver

Install New Components and Chain

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

Ensure continuous monitoring of the load chain according to DIN 685 section 5 and DGUV V54 (BGV D8), § 27.

Has the load chain been tested before starting operation?

Check the load chain links for the following issues

Measure the nominal thickness at the points of contact

Is the nominal thickness reduced by 10%?

Measure the elongation of a single chain or link

Is the chain or a link elongated by 5%?

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

Is the person adjusting the sliding clutch trained or competent?

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.

Decrease or increase clutch torque until the test load is just lifted or the clutch testing device shows the required value.

Verify that the original distance between the end of the tension rod and the pressure plate of the coupling is marked on a tag on the brake coil.

Loosen and remove the cap for gear cover (12) Fig.27.