2-M2
ZD21N-EC, ZD21-EC, ZD28-EC, WSM
TRANSAXLE
2. TRAVELLING SYSTEM
[1] HYDROSTATIC TRANSMISSION
(1) Structure
The hydrostatic transmission consists of variable displacement piston pump, fixed displacement piston motor and
valve system.
(1) Lubricating Orifice
(2) Bearing
(3) Pump Shaft
(4) Motor Shaft
(5) Center Section
(6) Cradle Bearing
(7) Slot Guide
(8) Trunnion Arm
(9) Cylinder Block (Pump)
(10) Swashplate
(11) Ball Bearing
(12) Thrust Ball Bearing
(13) Piston Spring
(14) Thrust Ball Bearing
(15) Cylinder Block (Motor)
(16) Check Valve Spring
(17) Relief Valve Spring
(18) Check Valve
(19) High Pressure Relief Valve
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