8-S9
L4400 , WSM
HYDRAULIC SYSTEM
(2) Relief Valve (Power Steering)
Relief Valve Setting Pressure
1. Disconnect the power steering delivery pipe joint bolt.
2. Install the adaptor E and adaptor 58 of relief valve setting
pressure tester to the regulator valve, and then set a thread joint,
cable and pressure gauge.
3. Start the engine and set the engine speed at max. speed.
4. Fully turn the steering wheel to the left or right and read the
pressure when the relief valve functions.
5. Stop the engine.
6. If the pressure is not within the factory specifications, check the
pump delivery line, adjust the relief valve by the adjusting screw
(1), or repair the power steering.
Condition
• Engine speed : Maximum
• Oil temperature : 40 to 60
°
C (104 to 140
°
F)
W1022630
(3) Hydraulic Pump Test Using Flow-meter (Three Point Hydraulic System)
Preparation
Remove 3P delivery pipe 2 (1) between hydraulic pump (2) and
front hydraulic block (3).
(When reassembling)
• Apply grease to the O-ring and take care not to damage it.
• Install the copper washers firmly.
W1019191
Power steering relief
valve setting pressure
Factory
spec.
2WD
8.0 to 9.0 MPa
81.4 to 91.4 kgf/cm
2
1158 to 1300 psi
4WD
10.7 to 11.7 MPa
109 to 119 kgf/cm
2
1552 to 1697 psi
Tightening torque
Power steering delivery
hose joint bolt
49.0 to 58.8 N·m
5.0 to 6.0 kgf·m
36.2 to 43.4 ft-lbs
Tightening torque
3P delivery pipe 2 screw
17.6 to 20.6 N·m
1.8 to 2.1 kgf·m
13.0 to 15.2 ft-lbs
3P delivery pipe joint bolt
49.0 to 69.0 N·m
5.0 to 7.0 kgf·m
36.2 to 50.6 ft-lbs
(1) 3P Delivery Pipe 2
(2) Three Point System Hydraulic Pump
(3) Front Hydraulic Block
(4) Copper Washers
(5) O-ring
KiSC issued 07, 2007 A
Tractor Manuals Scotland - Please Do Not Copy
Tractor Manuals Scotland
