8.5 Adjustment of lifting system
a. The clearance between the inner mast and the guide plate of the outer mast is
0.5-1.0mm, which is adjusted by the spacer of the guide plate. The clearance between
the side roller and the channel beam is 0.3-0.8mm, which is adjusted by the axial bolt
inner the roller.
b. Make the forks descend to the ground, adjust the lifting chain to assure the
distance between the center of lift bracket lower rollers and the bottom of inner mast is
smaller than 25mm.
c. Make the mast assembly tilts backward, adjust the pulling force of lift chains and
let the tightness of lift chains be equal.
d. Make use of the spacer of the lift cylinder to adjust the error occurred between
the right and left cylinders in height.
8.6 Maintenance and adjustment
8.6.1 Adjustment of lift cylinder (Fig8.5)
When replace the lift cylinder, inner mast or
outer mast, we shall readjust the stroke of the lift
cylinder as following:
(1) Install the piston rod in the upper beam of
the inner mast without shims.
(2) Lift the mast slowly to the max. stroke of the
cylinder and check the two cylinders synchronize or
not.
(3) Install shims between the top of the piston
rod of the cylinder which stop first and the upper
beam of the inner mast. The thickness of the shim is
0.2mm or 0.5mm.
(4) Adjust the tightness of lift chains. Fig8.5
Notice: Please pay more regard to safety when adjusting the lift cylinder at an
elevated height.
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