3-S54
L3130 · L3430 · L3830 · L4630 · L5030, WSM
TRANSMISSION
Checking Clutch Pack Pressure
1. Start the engine and warm up the transmission fluid, and then
stop the engine.
2. Remove the clutch pack pressure checking port plug (PT 1/8) on
the GST valve (2).
3. Install the adaptor “D” or GST valve adaptor to the checking port
(1), and then install the threaded joint, cable and pressure gauge.
4. Start the engine and set the idling speed.
5. Disengage the main clutch and shift the GST lever to “1st”
position, shuttle shift lever to “Forward” position.
6. Measure the pressure.
7. When the clutch pack pressure is not within factory
specifications:
Check the clutch valve and clutch pack.
8. Check the pressure changes while shifting the shuttle shift lever
“Reverse” to “Forward” and shifting the GST lever from
“Neutral” to “12th” or “8th”.
9. If the pressure does not change correctly, check the low-pass
valve and proportional reducing valve.
• Do not engage the main clutch while checking.
Condition
• Engine speed : Maximum
• Oil temperature : 40 to 60 °C
104 to 140 °F
• Shifting : GST lever “Neutral” to “1st” to “12th” or “8th”
Shuttle shift lever “Neutral” to “Forward” or “Reverse”
W1032163
(C) Others
Operating Pressure of PTO Clutch Valve
1. See page 3-S17.
W1032841
Clutch pack pressure Factory spec.
2.30 to 2.50 MPa
23.5 to 25.5 kgf/cm
2
334 to 363 psi
Pressure changing while shifting the shuttle shift
lever and main shift lever
It drops on 0.29 MPa
(3 kgf/cm
2
, 43 psi) once,
and it rises to factory
specification quickly.
(1) Clutch Pack Pressure Checking Port
(PT 1/8)
(2) GST Valve
(3) Adaptor
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