Power Steering Controller; Hydraulic Circuit; G23 (Mechanical Pto, Ld Model) - Kubota G23 Workshop Manual

G23, G26, WSM

1. HYDRAULIC CIRCUIT

[1] G23 (MECHANICAL PTO, LD MODEL)

(1) Power Steering Cylinder

(2) Power Steering Controller

(3) Relief Valve (Power Steering)
(4) Oil Filter
(5) Relief Valve (Oil Filter)
(6) HST (Hydrostatic
Transmission)
(7) HST Motor
The hydraulic system of this machine is composed of the hydraulic pump, the hydraulic control valve for the
mower and the grass collector, the power steering and other components.
This system has the following functions :
1. Oil is supplied by the hydraulic pump which is driven by the HST pump shaft and the idle gear in the transmission
case.
Since the hydraulic pump drive shaft is connected to the propeller shaft, the HST pump shaft and the idle gear
runs while the engine is rotating.
2. The hydraulic pump supplies the high pressured oil to the hydraulic control valve for the mower, the grass collector
and other hydraulic component parts as shown in the hydraulic circuit above after dividing the hydraulic oil by the
flow priority valve.
(8) By-pass Valve
(9) Orifice
(10) Check and High Pressure
Relief Valve (Forward)
(11) Check and High Pressure
Relief Valve (Reverse)
(12) Charge Valve
(13) HST Pump
(14) Oil Strainer
(15) Hydraulic Pump
(16) Transmission Case
(17) Relief Valve (Main)
(18) Flow Priority Valve
(19) Hydraulic Control Valve
(20) Mower Lift Control Valve
(Spool)
5-M1
HYDRAULIC SYSTEM
(21) Mower Lift Cylinder
(22) Grass Collector Dump Control
Valve (Spool)
(23) Grass Collector Dump
Cylinder
(24) Grass Collector Lift Control
Valve (Spool)
9Y1210294HYM0001US0
(EU)
KiSC issued 08, 2009 A