Kubota WSM B2050 Workshop Manual page 224

B2050, B2350, B2650, B3150, WSM
High Pressure Relief Valve Pressure (Forward)
CAUTION
• When checking, park the tractor on flat ground and fully
engage the parking brake.
1. Remove the lowering speed adjusting knob and the seat under
cover.
2. Remove the plug from P2 port (forward).
NOTE
• If the plug is tight to remove, warm up the plug by a hair
drier etc..
3. Install the adaptor (4) to P2 port (1).
4. Install the cable (3) and high pressure gauge.
Engine speed
Range gear shift position
HST pedal
Brake pedal
5. Start the engine and warm the oil before testing. Check to see
that parking brake is applied.
6. Place the range gear shift lever (5) to "HIGH" position.
7. Operate the engine at the rated speed.
8. Depress the front side pedal of the HST pedal (6).
9. Read the high pressure gauge to measure the high pressure
relief valve pressure.
10. If the measurement is not same as factory specification, check
the check and high pressure relief valve assembly.
Check and high pressure
relief valve
Factory specification
(Oil temperature at 40 to
60 °C (104 to 140 °F))
IMPORTANT
• Measure quickly so that the relief valve may not be in
operation more than 10 seconds.
NOTE
• High pressure gauge is 40 MPa (400 kgf/cm
scale.
• Engine speed: Rated speed
• Oil temperature: 45 to 55 °C (113 to 131 °F)
(When reassembling)
• Apply liquid lock (Three Bond 1324B or its equivalent) to the
plug.
Checking port plug
Tightening torque
(Forward)
(1) P1 Port (Reverse)
(2) P2 Port (Forward)
(3) Cable
(4) Adaptor
(5) Range Gear Shift Lever
(6) HST Pedal
3-S12
TRANSMISSION
Rated speed
High
Forward
Depressed
33 to 35 MPa
2
340 to 350 kgf/cm
4800 to 5000 psi
2
, 5800 psi) full
30 to 44 N·m
3.0 to 4.5 kgf·m
22 to 33 lbf·ft
L: Low Speed Position
M: Medium Speed Position
N: Neutral Position
H: High Speed Position
9Y1210982TRS0007US0
KiSC issued 03, 2014 A