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combined roller at the lower end. The inner mast keeps a fixed ralative position
between inner mast and outer mast during moving through main roller and side roller.
The maintenance of the roller and the side rollers on the inner and outer masts is
very important. Please be careful.
Figure 6-1 inner mast and outer mast
6.3 Fork bracket
The fork bracket runs inside of the iner mast through main roller. The main roller
is installed on main roller shaft with snap ring. The main roller is welded on fork
bracket. The side roller of upright plate is fixed on forkbracket with bolt. The
longitudinal load is beared by main roller. When the fork is lifted to the highest
position, the upper roller comes out form the mast upper end. The transverse load is
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