JLG Lull 1044C-54 II Series, Service Manual

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Boom and Transfer
31200079
6-107
The extend chains will be visible for inspection with the machine in this
state.
While doing the chain inspection, check all chain clevis ends for distortion
or cracking and sheaves for bearing wear or grooving from the chain.
If during the inspection, any chain is found to be damaged or stretched, the chain
must be replaced. It is recommended that when any chain is replaced, that all the
chains and clevis’ be replaced at the same time.
Note: DO NOT attempt to repair a chain. Replace a stretched or damaged chain
with a new part. Always replace both the chain and the clevis. It is
recommended that when any chain is replaced, that all the chains and
clevis’ be replaced at the same time.
b. Expose Retract Chains for Inspection
Note: The three retract chains are only partially visible through the rear of the
boom with all the sections retracted. It is possible to see a section of the
retract chain as the boom is slowly extended. If there is ANY question that
one or all the retract chains are damaged, the boom should be removed
and disassembled with the retract chains being inspected and replaced if
necessary.
c. Removing Extend and Retract Chains for Inspection
The four extend chains and the three retract chains can only be removed
during a complete boom teardown.
While doing the chain inspection, check all chain clevis ends for distortion
or cracking and sheaves for bearing wear or grooving from the chain.
If during the inspection, any chain is found to be damaged or stretched, the
chain must be replaced. It is recommended that when any chain is
replaced, that all the chains and clevis’ be replaced at the same time.
Note: DO NOT attempt to repair a chain. Replace a stretched or damaged chain
with a new part. Always replace both the chain and the clevis. It is
recommended that when any chain is replaced, that all chains and clevis’
be replaced at the same time.
Chain Lubrication
After inspection and before being returned to service, chains must be lubricated
with a quality chain lubricant (“LUBRIPLATE” Chain & Cable Fluid, “LPS3” or
equivalent).
The lubricant must penetrate the chain joint to prevent wear. Applying lubricant to
the external surfaces will prevent rust, but the chains should be articulated to make
sure the lubricant penetrates to the working surfaces between the pins and links.
To prepare the chain for lubrication, the chain plates should be brushed with a stiff
brush or wire brush to clear the space between the plates so that the lubricant can
penetrate to the working surfaces.
Lubricant may be applied with a narrow paint brush or directly poured on, but the
chain should be well flooded with lubricant, and the boom should be extended and
retracted to be sure that the lubricant penetrates to the working surfaces. All
surplus lubricant should be wiped away from the external surfaces.
DO NOT use a
solvent for this wiping operation.