7-M7
F2880, F3680, RCK72-F36, RCK72R-F36, RCK60-F36, RCK60R-F36, WSM
HYDRAULIC SYSTEM
7. HYDRAULIC CYLINDER
The main components of the hydraulic cylinder are shown in the figure above.
While the lift arm (7) is rising, oil from the hydraulic pump flows into the hydraulic cylinder through the implement
control valve (8). Then oil pushes out the piston (12).
While the lift arm (7) is lowering, oil in the hydraulic cylinder is discharged to the transmission case through the
implement control valve (8) by the weight of the implement. At this time, the lowering speed of the implement can be
controlled by the lowering speed adjusting valve (2) attached to the hydraulic cylinder case (4). Turning the lowering
speed adjusting knob clockwise decreases the lowering speed, and counterclockwise increases lowering speed.
When the lowering speed adjusting valve (2) is completely closed, the lift arm (7) is held at its position since oil in the
hydraulic cylinder is sealed between the piston (12) and lowering speed adjusting valve (2).
(1) Lowering Speed Adjusting
Shaft
(2) Lowering Speed Adjusting
Valve
(3) Orifice
(4) Hydraulic Cylinder Case
(5) Relief Valve
(6) Hydraulic Arm
(7) Lift Arm
(8) Implement Control Valve
(9) Hydraulic Rod
(10) Back-up Ring
(11) O-ring
(12) Piston
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