3-S87
L3130 · L3430 · L3830 · L4630 · L5030, WSM
TRANSMISSION
(B) Hydraulic Checking and Adjusting
Checking High Pressure Relief Valve Pressure
CAUTION
• When checking, park the machine on flat ground, apply the
parking brake.
1. Remove the hex. socket head plug from P1 or P2 port. (P2 is for
forward and P1 is for reverse.)
2. Assemble adaptor C (07916-50371) and threaded joint (07916-
50341) with the gasket between them.
3. Install the assemble adaptor C and threaded joint to P2 (forward)
or P1 (reverse) port.
4. Install the cable, threaded joint in relief valve set pressure tester
and high pressure gauge to threaded joint in order.
5. Check to see that parking brake is applied.
6. Run the engine at maximum speed.
7. Place the range gear shift lever in H position.
8. Depress the HST pedal, and measure the check and high
pressure relief valve pressure.
9. If the measurement is not within the factory specification, check
the check and high relief valve assembly. (See page 3-S103.)
• Measure quickly so that the relief valve may not be in
operation more than 10 seconds.
NOTE
• High pressure gauge is 40 MPa (400 kgf/cm
2
, 5800 psi) full
scale.
(When reassembling)
• Install the hex. socket head plug to the port with O-ring.
W1012199
Check and high relief
pressure (Oil
temperature at 40 to
60 °C (104 to 140 °F))
Factory spec.
33.3 to 36.3 MPa
340 to 370 kgf/cm
2
4836 to 5262 psi
(1) P1 Port (for Reverse) (2) P2 Port (for Forward)
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