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Page 9 of 38
Manual Tiger SS11-PLH En 201704 v3.2
Operating Principle of Overload Protected Lever Hoist
If the lever hoist is fitted with a slipping clutch overload mechanism then it is protected from overload.
The overload protection device is normally set to engage when a load of approximately 135% (±10%) of the WLL is lifted,
unless otherwise specified during purchasing. When the load limit is exceeded, the clutch in the chain wheel will slip, allowing
the handle to be operated whilst not engaging the gear box. This prevents further lifting of the load, though lowering is still
possible.
Continual overloading of the unit must be avoided as the efficiency of the clutch may be impaired. The overload clutch is
factory set and should only be adjusted or repaired by a Tiger authorised repairer. If there is any doubt as to the unit’s ability
to lift a load then don’t. Remove the unit from service and have it checked by your local Tiger distributor or service centre.
4. Cross Hauling/Fleeting/Drifting
The SS11 and PROLH ranges of lever hoists fitted with the patent protected twin pawl quad cam brake system have undergone
a full and comprehensive testing regime that was drawn up by industry specialists and Tiger’s mechanical engineers to
provide evidence that these units can be safely used for “fleeting”, “drifting” and “cross-hauling” applications up to 45°.
Note: All such operations should be carried out in accordance with manufacturer’s instructions and fully risk assessed by a
competent person.
Never disassemble or attempt to adjust the overload limiter assembly. Any attempt to do so will void the warranty.
Stop operating in the lifting direction when the hook block contacts the hoist body, as noted by the sudden increase in the
lever effort or the tipping of the hook block.
The operator must ensure that the hoist is suspended in a manner that makes it possible to operate the unit without
exposing himself or other personnel to danger by the unit itself, the suspension or the load.
Stand clear of all loads and avoid moving load over the heads of other personnel. Warn personnel of your intention to
move a load in their area. When the unit is not in use, position the suspension (e.g. bottom block, load hook) above normal
head height, if possible.
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