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The maintenance of the roller and the side rollers on the inner and outer masts
belong to exalted maintenance. Please be careful.
6.3 Lift Bracket
The lift bracket moves up and down smoothly along the channel of the inner mast
with main rollers. The main roller is fixed on the axis of the main roller by snap ring. And
the axis of the main roller is welded on the lift bracket. But the side roller is assembled on
the lift bracket with bolts. Main rollers sustain the longitudinal loads. And side rollers
sustain the transverse loads. When forks reach its maximum height, the upper pair of
main rollers will come out from the inner mast top.
6.4 Layout of Rollers
Ten main rollers are separately installed on the upper end of the outer mast (two),
lower end of the inner mast (two) and both side of the lift bracket upright (six).
Eight side rollers are separately installed on the upper end of the outer mast (two),
lower end of the inner mast (two) and the lift bracket (four).
With the aid of main rollers and side rollers to sustain the longitudinal and transverse
load, the inner mast and the lift bracket can operate smoothly.
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