TRANSMISSION
L3560, L4060, L4760, L5060, L5460, L6060, WSM
3-M21
4. HYDROSTATIC TRANSMISSION (HST)
[1] POWER TRAIN
The transmission of this model consists of a series of gears and shafts as shown in previous page. The traveling
system chiefly consists of hydrostatic transmission section, range gear shift section and front wheel drive section.
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(1) Structure
The HST of L60 series tractor is a built-in type to the clutch housing, and HST with the servomechanism is
adapted. The servomechanism controls the pedal operation of HST hydraulically. As a result, the HST pedal feels
extremely light and smoother pedal operation can be done.
HST assembly chiefly consists of HST case (clutch housing), variable displacement piston pump, variable
displacement piston motor, charge pump, Hi-Lo solenoid valve and proportional valves. Refer to the next page for
detailed parts in the HST.
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(1) Input Shaft
(2) HST Case (Clutch Housing)
(3) Outlet Port (To Oil Cooler)
(4) Check and High Pressure
Relief Valve (Forward)
(5) Check and High Pressure
Relief Valve (Reverse)
(6) Hi-Lo Solenoid Valve
(7) Charge Relief Valve
(8) Servo Piston
(9) Regulator
(10) Proportional Valve (Reverse)
(11) Proportional Valve (Forward)
(12) Charge Pump
(13) Pump Shaft
(14) Output Shaft (Motor Shaft)
(15) Port Block Cover
(16) Case Relief Valve
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