Hydraulic Cylinder - Kubota B1220 Workshop Manual

B1220, B1620, B1820, WSM

[6] HYDRAULIC CYLINDER

(1) Lowering Speed Adjusting
Shaft
(2) Ball
The main components of the hydraulic cylinder (3) are shown in the figure above. While the lift arm (10) is rising,
oil from the hydraulic pump flows into the hydraulic cylinder (3) through the control valve (9). Then oil pushes out the
piston (5).
While the lift arm (10) is lowering, oil in the hydraulic cylinder (3) is discharged to the transmission case through
the control valve (9) by the weight of the implement. At this time, the lowering speed of the implement can be
controlled by the ball (2) attached to the hydraulic cylinder (3). 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 (10) is held at its position since oil in the hydraulic cylinder (3) is sealed
between the piston (5) and ball (2).
(3) Hydraulic Cylinder
(4) Hydraulic Arm
(5) Piston
8-M10
(6) O-ring
(7) Back-up Ring
(8) Hydraulic Rod
HYDRAULIC SYSTEM
(9) Hydraulic Control Valve
(10) Lift Arm
9Y1210272HYM0014US0
(EU)
KiSC issued 07, 2011 A