2-M4
ZD321, ZD326, ZD331, WSM
TRANSAXLE
(3) Oil Flow
The pump and motor are joined in a closed hydraulic loop and most of oil circulates within the main oil circuit. A
little oil lubricates and oozes out from the clearance between the moving parts of the case. Then oil in the main oil
circuit of the HST needs to be supplied a want.
The charge oil is sent to the HST housing after the control valve and oil filter cartridge pass with the hydraulic pump.
And, pressure is always controlled to the charge oil with the regulator valve.
The charge oil aids smooth operation of pistons for pump and motor. And overflow oil from HST housing return to
the transmission case.
(1) Transmission Case
(2) Hydraulic Pump
(3) Oil Filter Cartridge
(4) Control Valve
(5) Regulator Valve
(6) PTO Clutch
(7) Oil Cooler
(8) Oil Filter Cartridge
(9) Cylinder Block (Pump)
(10) Lubricating Orifice
(11) Swashplate
(12) Piston
(13) Cylinder Block (Motor)
(14) Check and High Pressure
Relief Valve
To Next Page
Loading...
Need help?
General
