7.1.5 Tilt cylinder (Fig.7-17)
The tilt cylinder is of double-acting type. Each truck has two tilt cylinders which are
installed on two sides of the mast assembly with pin while their piston rod ends are
connected with the outer mast channels.
The tilt cylinder assembly 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 fitted 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.
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 5 degrees. When the tilt lever is pulled backward, high-pressure oil enters into
the cylinder body from the guided sleeve and moves the piston backward, tilting the mast
backward until 7 degrees.
Fig.7-17 Tilt cylinder
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