Kubota WSM L3560, Workshop Manual

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HYDRAULIC SYSTEM
L3560, L4060, L4760, L5060, L5460, L6060, WSM
8-S11
[3] RELIEF VALVE AND SAFETY VALVE
Relief Valve Setting Pressure Test Using Pressure Tester
(Coupler)
1. Install the relief valve set pressure adaptor to the quick coupler
(1) and then install a pressure gauge (Code No. 07916-50322),
cable (Code No. 07916-50331).
2. Start the engine.
3. Refer to
"Condition"
below to set the engine speed.
4. Set the front loader control valve operation lever to the
Left
position and read the pressure gauge when the relief valve is
actuated.
5. If the pressure is not within the factory specification, adjust the
shim (3).
Condition
• Engine speed
Approx. 2700 min
-1
(rpm) (Manual Transmission and GST)
Approx. 2600 min
-1
(rpm) (HST)
• Oil temperature
40 to 60 °C (104 to 140 °F)
(Reference)
• Thickness of shims (3)
0.1 mm (0.0039 in.)
0.2 mm (0.0079 in.)
0.4 mm (0.0157 in.)
• Pressure change per 0.1 mm (0.0039 in.) shim
Approx. 264.8 kPa (2.7 kgf/cm
2
, 38.4 psi)
9Y1210824HYS0008US0
Tightening torque Relief valve assembly
35 to 39 N·m
3.5 to 4.0 kgf·m
26 to 28 lbf·ft
Relief valve setting
pressure
Factory
specifica-
tion
L3560
17.1 to 18.1 MPa
175 to 184 kgf/cm
2
2480 to 2620 psi
L4060
L4760
L5060
L5460
L6060
18.1 to 19.1 MPa
185 to 194 kgf/cm
2
2630 to 2770 psi
(1) Quick Coupler
(2) Relief Valve
(3) Shim
(4) Plug
(5) Spring
KiSC issued 03, 2016 A