HYDRAULIC SYSTEM
M6040, M7040, WSM
8-S7
[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)
9Y1210143HYS0005US0
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 specification
18.2 to 19.1 MPa
185 to 195 kgf/cm
2
2640 to 2770 psi
(1) Relief Valve
(2) Lock Nut
(3) Adjuster
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