Kubota M5040, Workshop Manual

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8-S6
M5040, M6040, M7040, WSM HYDRAULIC SYSTEM
Hydraulic Flow Test (Continued)
Condition
• Engine speed : Approx. 2600 min
-1
(rpm)
• Rated pressure : 18.6 MPa
190 kgf/cm
2
2703 psi
• Oil temperature : 50 to 60 °C
122 to 140 °F
W1011083
[2] RELIEF AND SAFETY VALVE
Relief Valve Setting Pressure Test Using Pressure Tester
(Coupler)
1. Install the relief valve set pressure adaptor G (Code No. 07916-
52751) to the male half of the quick coupler and then install a
pressure gauge (Code No. 07916-50322).
2. Start the engine, set at maximum speed.
3. Set the auxiliary control valve operation lever to the
UP position
and read the pressure gauge when the relief valve is actuated.
4. If the pressure is not within the factory specification, adjust the
relief valve adjuster (3).
Condition
• Engine speed : Approx. 2600 min
-1
(rpm)
• Oil temperature : 45 to 55 °C
113 to 131 °F
W1020510
Hydraulic pump delivery
at no pressure
Factory spec.
Above 39.1 L/min.
10.33 U.S.gals./min.
8.6 Imp.gals./min.
Hydraulic pump delivery
at rated pressure
Factory spec.
38.3 L/min.
10.12 U.S.gals./min.
8.42 Imp.gals./min.
Allowable limit
32.2 L/min.
8.51 U.S.gals./min.
7.08 Imp.gals./min.
Tightening torque Relief valve assembly
34.3 to 39.2 N·m
3.5 to 4.0 kgf·m
25.3 to 28.9 lbf·ft
Relief valve setting
pressure
Factory spec.
18.2 to 19.1 MPa
185 to 195 kgf/cm
2
2632 to 2773 psi
(1) Relief Valve
(2) Lock Nut (3) Adjuster
KiSC issued 06, 2008 A