In the event of a power failure, a defective hoist motor or a defective brake coil, the load can be lowered by hand. To do so, the brake is released manually using the brake release lever.
Lowering a load by hand is an emergency measure.
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Danger due to falling load The load accelerates quickly if the brake is released too far. This could cause the load to lower in an uncontrolled fashion. Warn persons around the crane about the emergency lowering procedure. Activate the brake release lever very carefully. |
Cordon off the operating
range around the crane sufficiently.
Inform persons around the
crane about the emergency lowering procedure.
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Fan cover |
Rib screws |
Unscrew the rib screws
(3x) of the fan cover.
Take off the fan
cover.
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Brake release lever |
Threaded rod |
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Screw an M6 or M8 threaded
rod into the brake release lever.
Carefully and slowly tilt
the brake release lever backwards with the threaded rod.
● The brake is released, the load slips downwards.
Braking the load:
Let go of the brake
release lever if the load is dropping too quickly.
● The brake release lever tilts back, the load is braked.
The brake lining is subject to a heavy load during emergency lowering and can quickly overheat. The brake lining must therefore be replaced afterwards. See Replacing the brake rotor on the hoist drive.
