A: A Port; B: B Port; C: C Port- Page 302

TRANSMISSION

L3560, L4060, L4760, L5060, L5460, L6060, WSM

3-M26

[B] Stage 2



When the pedal is pressed toward the forward side

[Tractor Condition]

HST pedal: 

Forward

 Position

Hi-Lo select lever: 

Lo

When the HST pedal is pressed toward the forward side, signals from the HST pedal sensor are transmitted to

the ECU. Then the signals are transmitted from the ECU to the proportional control valve, which guide oil from the

regulator valve and moves the servo piston. With this, the swashplate on the pump side is tilted as shown in the

drawing. The speed of the motion and stroke of the servo piston are controlled by the ECU based on the motion of

the pedal.

9Y1210824TRM0033US0

(1) Pump Swashplate

(2) Pump Piston

(3) Pump Cylinder Block

(4) HST Filter

(5) Charge Pump

(6) Check and High Pressure 

Relief Valve

(7) Charge Relief Valve

(8) Motor Cylinder Block

(9) Motor Piston

(10) Motor Swashplate

(11) Out Put Shaft (Motor Shaft)

(12) Piston H

(13) Piston L

(14) Hi-Lo Spool

(15) Spool (Pressure Selector)

(16) Hi-Lo Solenoid Valve

(17) Oil Cooler

(18) Power Steering Controller

(19) Proportional Valve (Reverse)

(20) Proportional Valve (Forward)

(21) Regulator Valve

(22) Hydraulic Pump

(23) Engine

(24) PTO Valve

(25) Filter

(26) Transmission Case

(27) Servo Piston

(28) Servo Position

(29) ECU

(30) Hi-Lo Selector Lever

(31) HST Pedal Sensor

(32) HST Pedal

(33) Input Shaft (Pump Shaft)

(34) Case Relief Valve

A: A Port
B: B Port
C: C Port
D: D Port

a:

Charge Pressure

b:

High Pressure

d:

Regulating Pressure

e:

Signal

f:

Oil Flow

KiSC issued 03, 2016 A