3-S88
L3130 · L3430 · L3830 · L4630 · L5030, WSM
TRANSMISSION
Checking Charge Relief Pressure
CAUTION
• When checking, park the machine on flat ground, apply the
parking brake.
NOTE
• Use a new transmission oil filter.
1. Remove the hex. socket head plug from P2 (or P1) port.
2. Assemble adaptor 58 (07916-52391) and thread joint (07916-
50341) with the gasket between them.
3. Install the assembled adaptor 58 and thread joint to P2 port.
4. Install the cable, thread joint in relief valve set pressure tester and
low pressure gauge to threaded joint in order.
5. Place the range gear shift lever in neutral.
6. Run the engine at maximum speed.
7. Release the HST pedal to set in neutral, and measure the charge
pressure.
8. If the measurement is not within the factory specifications, check
charge relief valve (3) (See page 3-S103) or adjust with adjusting
shim.
• Adjusting shim is located on between spring guide (6) and
plug (7).
(Reference)
• Thickness of adjusting shim : 0.5 mm (0.02 in.)
• Pressure change per 0.5 mm (0.02 in.) of shim :
Approx. 61.8 kPa
0.68 kgf/cm
2
8.97 psi
• Low pressure gauge is 5 MPa (50 kgf/cm
2
, 711 psi) full scale.
W1012608
Charge pressure (oil
temperature at 50 to 60
°C (122 to 140 °F))
Factory spec.
2.26 to 2.45 MPa
23 to 25 kgf/cm
2
327 to 355 psi
(1) P1 Port
(2) P2 Port
(3) Charge Relief Valve
(4) Poppet
(5) Spring
(6) Spring Guide
(7) Plug
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