wsm L503 Workshop Manual page 306

L3130 · L3430 · L3830 · L4630 · L5030, WSM
(C) HST Linkages
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).
IMPORTANT
• Do not connect the universal joint of the implement to the
tractor PTO shaft while testing.
When PTO shift lever
is "ENGAGED"
position
Independent PTO
pressure
When PTO shift lever
is "DISENGAGED"
position
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
2
0.68 kgf/cm
8.97 psi
(1) Plug (PT 1/8)
(2) Spool
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.
3-S89
TRANSMISSION
2.21 to 2.40 MPa
22.5 to 24.5 kgf/cm
320 to 348 psi
No pressure
(3) Charge Relief Valve
(4) Adjusting Shim
W1224108
W1011525
KiSC issued 02, 2007 A
2