September 2016
Service Manual
Mast Components
Part No. 38139
AWP Super Series • IWP Super Series
99
How to Inspect the Lifting Chains
Inspection
Procedure
Inspection Failure
Inspection Remedy
Wear
Count out 16 chain links and
measure pin to pin
centerline dimension with a
steel measuring tape.
When the length of the 16
links (pin to pin) measure
more than 8.25 inches / 21
cm for 1/2 inch / 12.7mm
chain or 10.31 inches / 26.1
cm for 5/8 inch / 15.9 mm
chain.
Replace both chains on that
column. Replace entire
chain. Do not repair
just the
affected portion of the chain.
Note: Measure a section of
chain that moves over the
idler wheels.
Rust and Corrosion
Visually inspect the chains
for rust and corrosion.
Evidence of rust or
corrosion.
Remove chain and inspect
for cracked plates (see
inspection of cracked
plates). If no cracks are
found, lubricate chain with
motor oil (SAE 40) and
install chain.
Visually inspect the chains
for lubrication.
When external surfaces are
not protected with
a layer of
oil.
Lubricate chain with motor
oil (SAE 40W).
Tight Joints
Inspect chain link joints for
easy movement.
Joints that do not flex freely
or are binding.
If rust and corrosion is
found, refer to Failure
Remedy for rust and
corrosion.
If
link plates or pins are bent
or deformed, replace entire
chain. Replace both chains
on that column. Do not
repair just the affected
portion of the chain.
