STV32 · STV36 · STV40, WSM HYDRAULIC SYSTEM
8-M4
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 is composed 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)
Power steering pump 3P hydraulic pump
Pump discharge
per revolution
6.128 /rev.
0.374 cu.in. /rev.
10.09 /rev.
0.616 cu.in. /rev.
Pump discharge
per minute
14.0 L/m
3.70 U.S.gal./m
3.08 Imp.gal./m
(At no load, engine
2700 rpm)
23.0 L/m
6.09 U.S.gal./m
5.07 Imp.gal./m
(At no load, engine
2700 rpm)
(1) Regulator Valve a : From Transmission
(2) Pump Holder Case
(3) 3P Hydraulic Pump b : To Regulator Valve
(4) Power Steering c : To 3P Hydraulic System
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
0000007814E
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