TRANSMISSION
L3301, L3901, L4701, WSM
3-S22
Checking Charge Relief Pressure
• When checking, park the machine on flat ground, apply the
parking brake.
• 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. Operate 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-S91.) 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.) or 0.2 mm (0.008 in.)
• Pressure change per 0.5 mm (0.02 in.) of shim:
Approx. 125 kPa (1.27 kgf/cm
2
, 18.1 psi)
• Low pressure gauge is 5 MPa (50 kgf/cm
2
, 711 psi) full
scale.
9Y1211012TRS0018US0
Charge pressure
(oil temperature at
50 to 60 °C
(122 to 140 °F))
Factory specification
2.3 to 2.6 MPa
23.5 to 27.0 kgf/cm
2
334 to 384 psi
(1) P1 Port (Reverse)
(2) P2 Port (for Forward)
(3) Charge Relief Valve
(4) Poppet
(5) Spring
(6) Spring Guide
(7) Plug (GPF 3/8)
To Next Page
Loading...
