wsm STW37 Workshop Manual page 375

STW34, STW37, STW40, WSM
3. HYDRAULIC PUMP
The hydraulic pump is tandem type, front side is the
3P hydraulic pump (3) and rear side is the power
steering hydraulic pump (4). This pump consists of two
pairs of gears, side plates, bushing and other
components as shown in the figure. The hydraulic pump
is driven by the fuel camshaft, and the rotation increase
with the gears in the pump holder (2) by 37/21 times.
The 3P hydraulic pump (3) pressure-feed the oil to
the 3P hydraulic system. The power steering hydraulic
pump (4) pressure-feed the oil to the power steering
controller, bi-speed turn clutch and hydraulic PTO clutch
through the regulator valve (1) and bi-speed valve.
(Reference)
Pump discharge per 6.128 cm
revolution (0.374 cu.in. /rev.)
18.6 L/m
(4.91 U.S.gals/m,
Pump discharge per
4.09 Imp.gals/m)
minute
(At no load, engine
2700 min
(1) Regulator Valve
(2) Pump Holder
(3) 3P Hydraulic Pump
(4) Power Steering Hydraulic
Pump
(5) Driven Gear 1
(6) Bushing
(7) Bushing
(8) Driven Gear 2
(9) Drive Gear 2
(10) Side Plate
(11) Drive Gear 1
8-M5
HYDRAULIC SYSTEM
Power steering
3P hydraulic pump
pump
3 3
/rev. 10.09 cm
(0.616 cu.in. /rev.)
30.6 L/m
(8.08 U.S.gals/m,
6.73 Imp.gals/m)
(At no load, engine
-1 -1
(rpm)) 2700 min
a: From Transmission Case
b: To Regulator Valve
c: To 3P Hydraulic System
9Y1211109HYM0003US0
KiSC issued 11, 2014 A
/rev.
(rpm))