TRANSMISSION
L3301, L3901, L4701, WSM
3-S15
Checking Charge Relief Pressure
• When parking, park the machine on flat ground, apply the
parking brake.
1. Remove the brake rod and the propeller shaft. (See page
1-S34.)
2. Remove the hex. socket head plug from P port (1).
3. Assemble long adaptor C (07916-60831) and thread joint
(07916-50341) with the gasket between them.
4. Install the assembled long adaptor C and thread joint to P port
(1).
5. Install the cable, thread joint in relief valve set pressure tester
and low pressure gauge to threaded joint in order.
6. Place the range gear shift lever in neutral.
7. Operate the engine at maximum speed.
8. Release the HST pedal to set in neutral, and measure the
charge pressure.
9. If the measurement is not within the factory specifications,
check charge relief valve (2). (See page 3-S53.)
(When reassembling)
• Apply liquid lock (Three Bond 1324 or its equivalent) to the hex.
socket head plug.
Condition
• Engine speed:
Maximum
• Oil temperature:
45 to 55 °C (113 to 131 °F)
• Use a new transmission oil filter.
• Be sure to use a pressure gauge with over 2.9 MPa
(30 kgf/cm
2
, 430 psi) capacity.
9Y1211012TRS0008US0
Charge relief pressure Factory specification
0.5 to 0.6 MPa
5 to 8 kgf/cm
2
80 to 90 psi
(1) P Port
(2) Charge Relief Valve
(3) Poppet
(4) Spring
(5) Plug (GPF 3/8)
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