Kubota WSM STa-30, Workshop Manual

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3-M7
ST
α
-30 · ST
α
-35, WSM TRANSMISSION
■
Reverse Position
W1023685
When the speed control pedal is stepped on and in
reverse, the variable swashplate (10) is tilted as shown
in figure above.
As the pump cylinder block (2) rotates with the input
shaft (12), oil is forced out of pump kidney port B (14) at
high pressure. As pressure oil enters motor kidney port
D (15), the pistons (8), which align with port D (15), are
pushed against the swashplate (9) and slide down the
inclined surface.
Then the output shaft (6) rotates with the motor
cylinder block (7). This drives the machine rearward and
the angle of pump swashplate (10) determines the output
shaft speed.
As the motor cylinder block (7) continued to rotate, oil
is forced out of motor kidney port C (16) at low pressure
and returns and returns to the pump.
W1016535
(1) Oil Cooler
(2) Cylinder Block (Pump)
(3) Oil Filter (10
μ
)
(4) Check and High Pressure
Relief Valve (Reverse)
(5) Neutral Valve (Reverse)
(6) Output Shaft
(7) Cylinder Block (Motor)
(8) Piston (Motor)
(9) Fixed Swashplate
(10) Variable Swashplate
(11) Piston (Pump)
(12) Input Shaft
(13) Pump Kidney Port A
(14) Pump Kidney Port B
(15) Motor Kidney Port D
(16) Motor Kidney Port C
KiSC issued 11, 2006 A