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Unit 1, Greensfield Industrial Estate,
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ALNWICK, NE66 2DG
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Page 13 of 38
Manual Tiger SS11-PLH En 201704 v3.2
Thorough Examination
Thorough Examination may be needed at several points during the life of the unit: on initial use or following installation,
periodically during its life, or following exceptional circumstances. This lever hoist must be subject to periodic thorough
examination in compliance with national statutory regulations. The intervals between periodic thorough examinations must
consider the following:
The condition of the unit.
The environment in which it is to be used.
The number of lifting operations and loads lifted.
Reports of thorough examination can be based on statutory maximum intervals or via a written examination scheme based on
risks and hazards associated with use. i.e.:
Annual Inspection.
Period defined by examination scheme.
Following exceptional circumstance.
Due to the construction of the lever hoist, it will be necessary to partially disassemble the unit to perform the periodic
inspections.
Initial inspection and recurring inspections must be documented. Chapter 14 contains the inspection log which must be
maintained for each hoist. Any deficiencies noted are to be corrected before the lever hoist is returned to service.
The external conditions may show the need for a detailed inspection which, in turn, may require the use of non- destructive
type testing. Any parts that are deemed unserviceable are to be replaced with new parts before the unit is returned to service.
It is very important that the unserviceable parts are destroyed to prevent possible future use as a repair item and are properly
disposed of.
Note:
Only qualified personnel to perform lever hoist maintenance.
6.
Chain and Hooks
The hooks and load chains are made of special alloy-steels and are precisely heat-treated. Never weld or heat-treat them
again.
Load Chain
The load chains are exceptionally long-wearing, but wear is unavoidable and certain conditions will cause wear and corrosion
that will lessen the strength. Inspect the load chain for sufficient lubrication, mechanical damage and check for external
defects, deformations, superficial cracks, wear and corrosion marks.
Round steel section chains must be replaced when the original nominal thickness ´d´ on the chain link with the worst wear
has been reduced by more than 10% or when the chain has elongated to a value greater than the discard levels shown in the
tables below. There are two alternative tables for either measuring the chain over 21 links or measuring the chain over 7
pitches. Chain should be clean, free of twists and pulled taut before measuring.
Measuring the diameter of the chain
