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5)
CARRIAGE CHAIN
(1)
Place a sling around carriage front plate
and attach to an overhead hoist. Lift and
secure carriage high enough so that split
and chain anchor pins on carriage can be
easily be removed. Remove chain anchor
pins from carriage and drape chains out
over carriage.
(2)
Place a wooden block under the carriage
and lower the carriage on the block.
(3)
While supporting the chains, remove split
pins and chain anchor pins from chain
anchors.
(4)
Remove chains and wash them with
solvent. Refer to this section for Load
chain inspection and maintenance.
(5)
Reverse the above procedure to assemble
and install. Use new split pins in chain
anchor pins.
Refer to this section for Load chain
lubrication and adjustment.
LOAD CHAIN INSPECTION AND
6)
MAINTENANCE
After every 200 hours of truck operation, lift
chains should be inspected and lubricated
inspect for the following chain conditions :
(1)
Wear
As the chain flexes on and off the
sheaves, the joints very gradually wear.
The stretch a chain develops in service is
due to material being worn off pin outer
diameter and pitch hole inner diameter on
the inside plate.
Chain wear can be measured using a
wear scale or steel tape. When chains
have elongated 3%, they should be
discarded. When checking chain wear, be
sure to measure a segment of chain that
operates over a sheave. Do not repair
chains by cutting out the worn section and
splicing in a new piece. If part of the chain
is worn, replace all the chains on the truck.
Outer mast
Work lamp assy
Lift
chain
L1
(New)
8-16
Inner mast
Block
110D7ERE55
Wear
L2
L2 > L1
(Used)
(Elongation)
100D7MS19
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