Kubota RTV1140CPX, Workshop Manual

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TRANSMISSION
RTV1140CPX, WSM
2-M12
(B) Pedal Depressed Halfway and Under Light Load
The pedal (1) is depressed halfway, the control lever is activated by the pedal (1) to switch the regulator valve (2)
hydraulic circuit. The servo piston (4) is then actuated to tilt the pump variable swashplate (18) (see the above
illustration).
The pump cylinder block (5) is driven by the input shaft (21) to put the oil under high pressure and to feed it out
of the pump port A . The pressure-fed oil flows into the motors port D along the circuit. The motor's piston is actuated
by this pressurized oil to push down the stationary swashplate. Then together with the motor cylinder block (5), the
output shaft (16) starts turning.
The output shaft rotation is determined by the delivery rate of the HST pump (19), varying the rotation.
Then the motor oil drops to a low pressure and returns through the motor port
C to the pump port B .
9Y1210293TRM0012US0
(1) Pedal
(2) Regulator Valve Assembly
(3) Regulator Spool
(4) Servo Piston
(5) Cylinder Block
(6) HST Housing
(7) Control Piston
(8) Variable Swashplate
(Assist Motor)
(9) Cylinder Block (Assist Motor)
(10) Check and High Pressure
Relief Valve (Forward)
(11) Unload Valve
(12) Check and High Pressure
Relief Valve
(13) Cylinder Block
(Stationary Motor)
(14) Anti-cavitation Valve
(15) Transmission Case
(16) Output Shaft
(17) Charge Relief Valve
(18) Oil Filter Cartridge (Suction)
(19) Variable Swashplate
(HST Pump)
(20) Charge Pump
(21) Input Shaft
(22) Oil Filter Cartridge
a: To HST Housing
KiSC issued 05, 2014 A