HYDRAULIC SYSTEM
G23-2, G26-2, WSM
5-M4
[4] G26 (HYDRAULIC PTO, HD MODEL)
The hydraulic system of this machine consists of the hydraulic pump, the hydraulic control valve for the mower
and the grass collector, the power steering, the hydraulic PTO clutch 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
running 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.
9Y1210892HYM0004US0
(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
(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)
(21) Mower Lift Cylinder
(22) Grass Collector Dump Control
Valve (Spool)
(23) Grass Collector Dump
Cylinder
(24) Grass Collector Lift Control
Valve (Spool)
(25) Grass Collector Lift Cylinder
(26) Hydraulic Valve
(27) Relief Valve (PTO Clutch)
(28) Hydraulic PTO Clutch
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