STV32 · STV36 · STV40, WSM HYDRAULIC SYSTEM
8-S11
Checking Bi-speed / PTO System Pressure
1. Start the engine and warm up the transmission fluid, and then
stop the engine.
2. Remove the bi-speed system pressure checking port (1) plug
(PT 1/8) on the bi-speed valve (2).
3. Install the adaptor "D" to checking port (1), and then install the
threaded joint, cable and pressure gauge.
4. Start the engine and set the idling speed.
5. Measure the pressure.
6. If the measurement is not within factory specifications, adjust
the pressure reducing valve adjustor (4) on the regulator valve
(5).
Condition
A Engine speed ........ Idling speed
A Oil temperature ..... 40 to 60 (104 to 140 )
(Reference)
A Turn to clockwise direction Pressure is increased
A Turn to counterclockwise direction Pressure is decreased
Bi-speed / PTO system
pressure
Factory spec.
1.76 to 1.86 MPa
18 to 19
256 to 270 psi
(1) System Pressure Checking (4) Pressure Reducing Valve
Port (PT 1/8) Adjustor
(2) Bi-speed Valve (5) Regulator Valve
(3) Adaptor D
0000007847E
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