3-S89
L3130 · L3430 · L3830 · L4630 · L5030, WSM
TRANSMISSION
Operating Pressure of PTO Clutch Valve
1. Start the engine and warm up the transmission fluid, and then
stop the engine.
2. Remove the plug (1) (PT 1/8) on the PTO valve spool (2).
3. Set the pressure gauge.
4. Start the engine and measure the pressure.
5. For adjustment use the adjusting shim (4) of HST charge relief
valve (3).
• Do not connect the universal joint of the implement to the
tractor PTO shaft while testing.
Condition
• Engine speed ........ Idling speed
• Oil temperature ...... 40 to 60 °C
104 to 140 °F
(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
W1224108
(C) HST Linkages
Checking Neutral
1. Disengage the front wheel drive lever. (Drive only rear wheels.)
2. Lift the rear of the tractor so that the rear wheels are off the
ground and run the engine at low idling and drive only rear
wheels.
3. Depress the one end of speed control pedal and release, and do
the same at the other end.
4. If the rear wheels do not stop turning, adjust as following
procedure of next page.
W1011525
Independent PTO
pressure
When PTO shift lever
is “ENGAGED”
position
2.21 to 2.40 MPa
22.5 to 24.5 kgf/cm
2
320 to 348 psi
When PTO shift lever
is “DISENGAGED”
position
No pressure
(1) Plug (PT 1/8)
(2) Spool
(3) Charge Relief Valve
(4) Adjusting Shim
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