Kubota GR1600EC2, Workshop Manual, Page: 121 / 241

2-M2
GR1600EC2, WSM TRANSAXLE
2. TRAVELLING SYSTEM
[1] HYDRAULIC TRANSMISSION
(1) Structure
Hydrostatic Transmission (HST) consists of a variable displacement piston pump, a fixed displacement piston
motor, two check valves (1) and a by-pass valve.
The pump and motor have five pistons (8) in their own cylinder block (6), (21).
The discharge rate of the HST is 10 cm
3
/rev. (0.61 cu. in./rev.).
With the speed change pedal connecting to the trunnion arm (2) in HST via a link mechanism, the speed change
pedal permits simple operation of this machine, starting, stopping and accelerating or decelerating.
(1) Check Valve
(2) Trunnion Arm
(3) Charge Relief Valve
(4) Charge Pump
(5) Center Section
(6) Cylinder Block (Pump)
(7) Piston Spring (8) Piston
(9) Spring (Cylinder Block)
(10) Washer
(11) Thrust Ball Bearing
(12) Swashplate
(13) Cradle Bearing
(14) Ball Bearing
(15) Oil Seal
(16) Pump Shaft
(17) Ball Bearing
(18) Oil Seal
(19) Motor Shaft
(20) Thrust Ball Bearing
(21) Cylinder Block (Motor) (22) By-pass Plug
(23) By-pass Spool
(24) By-pass Spring
(25) Journal Bearing
(26) Oil Seal
(27) Journal Bearing
(28) Oil Seal
KiSC issued 07, 2006 A