7.1.1 Inner and outer mast
The inner and outer masts are welded parts. The bottom of outer mast is connected
with the drive axle through supporting. At the outside middle of outer mast, it is connected
with the frame by the tilt cylinder. The mast can be tilt forward and backward by operating
the tilt cylinder. The outer mast is made of C-shaped channel and main rollers and side
rollers are assembled on the upper part of it. The inner mast is made of J-shaped channel
and there are main rollers and side rollers at the bottom of it.
Notice: Please pay more regard to safety when maintaining the main rollers and side
rollers on the upper of outer mast.
7.1.2 Lift bracket
The lift bracket moves up and down smoothly along the channel of the inner mast by
the main rollers. The main rollers mounted on the main roller shafts and blocked by snap
rings. The main roller shafts are welded on the lift bracket. The side rollers fitted on the lift
bracket with bolts. They roll along the flank plate of the inner mast and rolling clearance
can be adjusted with shims. The main rollers sustain the longitudinal loads and the side
rollers sustain the transverse loads.
7.1.3 Fork
The fork is fastened on the lift bracket upper beam groove with pins, the fork
clearance can be adjusted with hands. The forks and lift brackets are manufactured
according to the international standard.
The fork pin fastens the fork on the definite position. When adjusting the clearance of
the fork, pull the fork pin turn 1/4 circle, the fork clearance must be adjusted according to
the loaded goods.
7.1.4 Roller position (Fig7.2)
There are two kinds of rollers, main roller and side roller. They are separately
mounted on the outer mast, inner mast and lift bracket. The main rollers sustain the loads
from front and rear direction and the side rollers sustain the side loads, this will make the
inner mast and lift bracket move freely.
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