wsm RTV-X1120D Workshop Manual page 240

RTV-X900, RTV-X1120D, WSM
[D] Swashplate On The Motor Is Starting To Tilt From Low Load When The Speed Control
Pedal Is Pressed
The diagram shows the motion of the regulator valve spool when the speed control pedal (21) is pressed all the
way down.
The servo piston tilts the variable swashplate on the pump side to the maximum position.
The pump cylinder block (20) is driven by the input shaft (10) and high pressure oil is discharged from port A.
High pressure oil that is discharged from port A of the pump flows along the circuit to port C on the motor side.
Based on pressure of oil discharged from the pump, the control piston 1 (2) starts to tilt the variable swashplate
(5) on the motor.
Rotational speed of the output shaft (6) is lowered due to tilting of the cylinder block (7) on the motor.
Torque is increased through reduction in rotational speed of the output shaft (6).
2-M25
TRANSMISSION
(1) Unload Valve
(2) Control Piston 1
(3) Control Piston 2
(4) HST Housing
(5) Variable Swashplate
(Motor)
(6) Output Shaft
(7) Cylinder Block
(Stationary Motor)
(8) Control Piston 3
(9) Anti-cavitation Valve
(10) Input Shaft
(11) Charge Relief Valve
(12) Oil Filter
(13) Charge Pump
(14) Oil Filter Cartridge (Suction)
(15) Oil Tank
(16) Servo Piston
(17) Regulator Valve Spool
(18) Regulator Valve
(19) Variable Swashplate
(HST Pump)
(20) Cylinder Block
(21) Speed Control Pedal
(22) Check Valve
(23) Orifice
(24) Check And High Pressure
Relief Valve (Forward)
(25) High Pressure Relief Valve
(Dynamic Brake)
a: To HST Housing
A: A Port
B: B Port
C: C Port
D: D Port
9Y1210946TRM0027US0
KiSC issued 01, 2014 A