8.2 MAINTENANCE
8.2.1 ADJUST LIFT CYLINDER ROD WITH SHIMS
After the lift cylinders, inner channel, or outer channel is replaced, the lift cylinder rod length
needs to be adjusted.
(1) Install a piston head on the rod of each lift
cylinder without using shims.
(2) Extend the rod of each lift cylinder slowly
and examine the difference in the rod
stopping time when the rod reaches the
stroke end between the two lift cylinders.
(3) Add shims to the space between the rod
and piston head of the lift cylinder whose
rod stops rst.
Shim thickness: 0.2 and 0.5 mm
[0.0079 and 0.0197 in.]
(4) Adjust the lift chain tension.
8.2.2 ADJUSTING HEIGHT OF CARRIAGE
(1) Stop the truck on a level surface and put
the mast vertically.
(2) Keep the fork bottom on the ground and
adjust the projected amount
A
of the
carriage lower end roller to the value as
shown in Table 8.1, using the chain anchor
pin at the mast side.
Table 8.1
Model Mast Type
A
(mm [in.])
1 – 1.8 t VM-7P1 36 – 41 [1.42 – 1.61]
2 – 2.5 t VM-7P4 24 – 29 [0.94 – 1.14]
3.0 t VM-7P7 44 – 49 [1.73 – 1.93]
3.5 t VM-7P9 37 – 42 [1.46 – 1.65]
Fig. 8.8
FORK
TIRE
INNER CHANNEL
END ROLLER for
carriage
Fig. 8.7
LIFT CYLINDER
PISTON HEAD
SHIM
LOCK BOLT
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