Lift Trucks Mast System Testing & Adjusting
2. Make adjustments to chain anchor nuts (1) or bolts
(2) for equal tension of the mast and carriage
chains.
3. Put LOCTITE NO.242 Thread Lock on the threads
of the locknuts after the adjustment is completed.
Outer Lift Chains
(2) Chain Anchor Bolts.
Chain Wear Test
Chain wear test is a measurement of wear of the
chain links and pins. Do the steps that follow to
check chain wear.
1. Lift the mast and carriage enough to put tension
on the lift chains.
2. Measure precisely ten links of chain distance at
the center of pins in millimeter.
A chain wear gauge can also be used.
3. Calculate chain wear rate.
New one pitch = 25.4 mm
Chain wear rate (%)
= Actual measurement - 254
x 100
254
Do not put a lift truck into service if the chain wear
indication is 2% or more. A reading of 2% or more
could cause damage or injury to persons.
4. If the chain wear indication is 2% or more, replace
the lift chain.
Carriage and Mast Height
Adjustment
1. Move the mast either forward or backward so it is
in the vertical position.
2. Lower the carriage completely.
3. On Full Free Lift and Full Free Triple Lift models,
the bottom of the inner mast must be even with the
bottom of the stationary mast.
4. Measure the distance from the bottom of the inner
upright to the bottom of carriage bearing end.
5. The measurement (A) must be as follows:
STD ............................-7 L 2 mm (-0.27 L 0.07 in)
FFL & FFTL ................43 L 2 mm (1.69 L 0.07 in)
If the above measurements are not correct, make
adjustments to the chains to get the correct
measurement. See Chain Adjustments in TESTING
AND ADJUSTING.
IDCS191S
To Next Page
