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Forks and Lift Chain
Lift Chain Inspection and Lubrication
During normal operation, inspect and lubricate the lift chains every 450 to 500 hours. If
operating in a corrosive or extreme working condition, inspect the lift chains more frequently.
Be sure to check for the following: corrosion, cracked plates, raised or turned pins, tight joints,
excessive wear, and worn pins and holes.
Lift chain lubrication is a critical part of your planned maintenance program. The correct and
timely lubrication of the lift chains will also maximize their service life.
Lift Chain Wear and Replacement Criteria
The lift chain will gradually stretch over time during normal operation. When a section of chain
has stretched 3% or more, it is considered excessively worn and must be replaced. When
checking for chain stretch, always measure a segment of chain that moves over a sheave.
WARNING
Do not attempt to repair a worn or broken lift chain.
• New Chain Length (A): distance from the
rst pin counted to the last pin counted in a
span while the chains are lifting a small load.
• Worn Chain Length (B): distance from the
rst pin counted to the last pin counted in a
span while the chains are lifting a small load.
• Span (C): number of pins in the segment of
chain to be measured.
• Pitch (D): distance from the center of one pin
to the center of the next pin.
Load Backrest
Check the condition of the load backrest. Inspect the
welds on the load backrest and carriage for cracks.
Check that the load backrest mounting fasteners are
not missing and properly tightened to specication. If
the load backrest has been removed, make sure that
fork stops have been installed on each side of the
carriage.
WARNING
If the lift truck is not equipped with a load backrest, or it has been removed, then fork
stops must be installed on each side of the carriage to prevent the forks from being
unintentionally forced o of the carriage during operation.
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