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USER MANUAL
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Red Rooster Lifting Limited
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Nauta House, The Meadows, Oldmeldrum, Aberdeenshire, AB51 0EZ
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Tel: +44 (0) 1651 872101
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M01-AH28 REV2
SPEED & LOAD LIMITER ADJUSTMENT
7.1
SPEED ADJUSTMENT
Every TMH hoist is checked at the factory to ensure the maximum hoisting speed is in accordance with the specification.
CORD CONTROL HOIST
The speed of the hoist is proportional to the amount of downward movement in the control cord, which via the cord lever controls the amount by
which the valve is opened.
On every TMH hoist the load limiter is factory set to operate at a load ten percent in excess of the safe working load, at an operating pressure of
6 bar. Unless a lower supply pressure is to be used, the load limiter will not require adjustment.
All models in the range incorporate an adjustable load limiter
HOW IT WORKS
Located adjacent to the control valve, the load limiter measures the pressure drop across the motor which is proportional to the load on the
motor. Once the pressure drop is increased above that of the load limiter setting, the brake is applied and the hoist will not lift the load. In this
case the load should then be reduced or a larger capacity hoist installed. The load can still be lowered when the load limiter cuts in.
Verify that the Chain / Limit Levers are operational and can move freely in both the up and down directions.
SLOW
FAST
WHITE CORD
FOR UP
RED CORD
FOR DOWN
CAUTION
LIMIT LEVER UP
CONTROL LEVER
STOP
(NEUTRAL POSITION)
CHAIN
LIFTING
LOWERING
HOOK BLOCK
LIMIT LEVER DOWN
