Kubota WSM STa-30, Workshop Manual

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7-S5
ST
α
-30 · ST
α
-35, WSM BI-SPEED TURN
4. CHECKING, DISASSEMBLING AND SERVICING
[1] CHECKING AND ADJUSTING
(1) Bi-speed Solenoid Valve
Bi-speed Solenoid Valve Relief Pressure
1. Jack up the rear wheels and shift the front wheel drive lever to
OFF position.
2. Remove the plug (1) then install the hydraulic test adaptor D (PT
1/8) and set a pressure tester.
3. Start the engine after warm up, measure the unload valve
operating pressure.
4. If the measurement is not within the factory specification, check
the operation of unload valve.
5. Set the bi-speed operating mode as follow.
- Range shift lever : 1
- Turn on the bi-speed : switch
- Turn the front wheel right or left to 0.61 rad. (35 °) and more
- Cruise control lever : 1 (Rotate the rear wheels)
6. Measure the bi-speed solenoid valve relief pressure. If the
measurement is not within the factory specification, adjsut the
relief pressure with adjusting screw (2).
CAUTION
• Be sure to disengage the front wheel drive, when checking
the bi-speed solenoid valve relief valve.
Condition
• Engine speed : Maximum
• Oil temperature : 45 to 55 °C
113 to 131 °F
W1014483
Unload valve operating
pressure
Factory spec.
0.2 to 0.49 MPa
2.0 to 5.0 kgf/cm
2
28.45 to 71.11 psi
Relief valve setting
pressure
Factory spec.
1.77 to 1.86 MPa
18.0 to 19.0 kgf/cm
2
256.01 to 270.24 psi
(1) Plug (2) Adjusting Screw
KiSC issued 11, 2006 A