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8.2 Maintenance and adjustment of mast system
8.2.1 Adjustment of lift cylinder
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 (Fig.8-4). The shims are 0.2mm or 0.5mm thick.
(4) Adjust the tightness of lift chains.
The adjustment of lift cylinder also belongs to exalted maintenance. Please be careful.
Fig.8-3 Roller position
Fig.8-4
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