8-S8
L2800, L3400, WSM
HYDRAULIC SYSTEM
Hydraulic Flow Test (Continued)
[L2800]
[L3400]
W1024801
(2) Relief Valve (for 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.
(Reference)
• One quarter turn of the adjusting screw (1) changes the relief
setting pressure by approx. 1.27 MPa (13 kgf/cm
2
, 185 psi).
Condition
• Engine speed : Maximum
• Oil temperature : 50 to 60 °C (122 to 140 °F)
W1022630
Hydraulic pump delivery
at no pressure
Factory spec.
Above 16.1 L/min.
4.25 U.S.gals/min.
3.54 Imp.gals/min.
Hydraulic pump delivery
at rated pressure
Factory spec.
Above 15.0 L/min.
3.96 U.S.gals/min.
3.30 Imp.gals/min.
Allowable limit
13.5 L/min.
3.57 U.S.gals/min.
2.97 Imp.gals/min.
Hydraulic pump delivery
at no pressure
Factory spec.
Above 15.6 L/min.
4.12 U.S.gals/min.
3.43 Imp.gals/min.
Hydraulic pump delivery
at rated pressure
Factory spec.
Above 14.5 L/min.
3.83 U.S.gals/min.
3.19 Imp.gals/min.
Allowable limit
13.1 L/min.
3.46 U.S.gals/min.
2.88 Imp.gals/min.
Power steering relief
valve setting pressure
Factory
spec.
2WD
8.3 to 9.3 MPa
85 to 95 kgf/cm
2
1209 to 1351 psi
4WD
11.1 to 12.1 MPa
113 to 123 kgf/cm
2
1607 to 1749 psi
Tightening torque
Power steering delivery
hose joint bolt
34.0 to 39.0 N·m
3.5 to 4.0 kgf·m
25.3 to 28.9 ft-lbs
(1) Adjusting Screw (2) Lock Nut
Tractor Manuals Scotland - Please Do Not Copy
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