wsm STW37 Workshop Manual page 229

STW34, STW37, STW40, WSM
Checking High-pressure Relief Valve
1. Start the engine to warm up the transmission oil until to reach
50 °C (122 °F).
2. Remove the seat under cover and the step.
3. Install adaptor C (Code No.: 07916-50371) (3) and pressure
gauge (49.0 MPa, 500 kgf/cm
forward or reverse high-pressure checking port plugs.
4. Depress the brake pedals and set the engine rpm with
-1
1500 min (rpm).
5. Shift the auxiliary shift lever to "3".
6. Depress the HST pedal to forward or reverse until relief valve
functioning. Then measure the pressure for each one.If the
measurement is not within the factory specification, check the
check and high-pressure relief valve, neutral valve and HST.
NOTE
• High-pressure checking port and high-pressure relief plug
for forward are on the left side of the HST.
High pressure relief
Factory specification
valve pressure
Condition
• Engine speed:
-1
1500 min (rpm)
• Oil temperature:
40 to 60 °C (104 to 140 °F)
(1) Neutral Valve (Forward)
(2) Neutral Valve (Reverse)
Checking Charge Relief Valve
1. Start the engine to warm up the transmission oil until to reach
40 °C (104 °F)
2. Remove the plug from the oil filter bracket.
3. Connect the adaptor 58 (2) and pressure gauge.
4. Measure the pressure with speed control pedal to be neutral at
-1
engine 1500 min (rpm). If the measurement is not within
factory specification, check charge relief valve.
Charge relief pressure Factory specification
Condition
• Engine speed:
-1
1500 min (rpm)
• Oil temperature:
40 to 60 °C (104 to 140 °F)
(1) HST Oil Filter Cartridge
3-S15
TRANSMISSION
2
, 7110 psi) after removing
26.4 to 29.4 MPa
2
270 to 300 kgf/cm
3840.2 to 4266.9 psi
(3) Adaptor C
(4) High-pressure Relief Valve
(Reverse)
9Y1211109TRS0014US0
0.4 to 0.8 MPa
2
4 to 8 kgf/cm
56.9 to 113.8 psi
(2) Adaptor 58
9Y1211109TRS0015US0
KiSC issued 11, 2014 A