Shibaura ST318, Workshop Manual

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2. Check of pressure of low pressure relief valve. (charge
pump pressure)
➀
Set the range transmission and HST pedal at the
neutral position.
➁
Remove the top cover of the transmission case and
remove the eye bolt of the right side oil pipe.
1. Eye bolt
➂ Drill and tap a eye bolt (part No. 388480240) for
pressure testing as shown. Install the special eye
bolt for pressure check.
1. Eye bolt (for Pressure test)
2. Drill and tap PT1/8.
➃ Install an eye bolt for pressure measurement and
install a pressure gauge
:
0 – 2.5 MPa
(0 – 25kgf/cm
2
) to eye bolt.
➄ Increase the engine speed to 2500rpm and read the
indication on the pressure gauge.
Set pressure
0.4 – 0.6 MPa
(4.3 – 5.7 kgf/cm
2
)
➅ If the pressure reading is low, check the following:
a. Restricted suction filters
b. Check or replace the charge pump relief valve
c. Check and repair the charge pump
➆
If the pressure reading is high, check the following:
a. Stuck or restricted charge pump relief valve
T582
T583
T584
T584-1