Manitowoc GROVE GMK7450 - Checking the Hoist Brake; General Inspection

Maintenance work on the superstructure
8.6 Hoists
8 - 44 3 302 577 en Maintenance manual
GMK7450
16.08.2018
8.6.2 General inspection
•
Pay attention to any unusual running noises from the hoists.
• Check the hoists and the connections for leaks. If consumables are leak-
ing;
à Checking the oil level, P. 8 - 43.
• Check that pipes and hoses are tightly connected and undamaged.
If any damage is found, report it to
Manitowoc Crane Care or an authorised
GROVE dealer or your repair crew.
8.6.3 Checking the hoist brake
Check that the hoist brake is working correctly on the main hoist and the
auxiliary hoist.
Main hoist
• Attach the hook block to the hoist rope, reeved once.
• Lift a test load of approx. 11.2 t (24 700 lbs) approx. 30 cm (1.0 ft) above
the ground.
• Measure the distance to the ground when the load is hanging completely
still.
• Switch the engine off.
If the load has not lowered after approx. 2 minutes, the brake is currently in
working order.
If the load lowers, n
otify
Manitowoc Crane Care or an authorised GROVE
dealer.
Auxiliary hoist
• Carry out the check on the auxiliary hoist in just the same way as the main
hoist, but use a load of approx. 10.0 t (22 045 lbs).
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