7.1.4 Tilt cylinder
The tilt cylinder is of double-acting type. Each truck has two tilt cylinders that are
installed on two sides of the frame with pin while their piston rod ends are connected with
the outer mast.
The tilt cylinder consists primarily of piston, piston rod, cylinder body, cylinder base,
guide sleeve and seals. The piston, welded to the piston rod, is fitted with two Yx-rings
and one wear ring on its circumference. A bushing press-fitted to the inner side of the
guide sleeve supports the piston rod. The guide sleeve is with dust seal, snap ring,
Yx-ring and O-ring to prevent oil leakage and keep dust off. Fitted with them, the guide
sleeve is screwed into the cylinder body. The construction of tilt cylinder is referred to
Fig.7-8.
When the tilt lever is pushed forward, the high-pressure oil enters into the cylinder
body from the cylinder tail, moving the piston forward and causing the mast assembly to
tilt forward until 6 degrees. When the tilt lever is pulled backward, high pressure oil enters
into the cylinder body from the guider sleeve and moves the piston backward, tilting the
mast assembly backward until 12 degrees.
Fig. 7-8 Tilt cylinder
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