Relief Valve - wsm L503 Workshop Manual

L3130 · L3430 · L3830 · L4630 · L5030, WSM

[2] RELIEF VALVE

(1) Checking and Adjusting
(2) Disassembling and Assembling
Relief Valve Setting Pressure Test
1. Remove the delivery pipe joint bolt from front hydraulic block.
2. Install the adaptor E. Then connect the cable and pressure
gauge to adaptor E.
3. Start the engine and set at maximum speed.
4. Move the position control lever (1) all way up to operate the relief
valve and read the gauge.
5. If the pressure is not within the factory specifications, remove the
relief plug (2) of front hydraulic block (3) and adjust with the
adjusting shims (4).
6. After the relief valve setting pressure test, reset the position
control lever stopper firmly.
Relief valve setting Factory
pressure spec.
Condition
• Engine speed.........Maximum
• Oil temperature.....40 to 60 °C
104 to 140 °F
(Reference)
• Thickness of shims (4) : 0.1 mm (0.0039 in.)
• Pressure change per
0.1 mm (0.0039 in.) shim : Approx. 264.8 kPa
(1) Position Control Lever
(2) Relief Plug
(3) Front Hydraulic Block
Relief Valve
1. Remove the plug (9), and draw out the spring (5) and the poppet
(4).
2. Take out the valve seat (3).
(When reassembling)
• Take care not to damage the O-ring.
Tightening torque Relief valve plug
IMPORTANT
• After disassembling and assembling the relief valve, be sure
to adjust the relief valve setting pressure.
(1) Front Hydraulic Block
(2) Cap
(3) Valve Seat
(4) Poppet
(5) Spring
8-S11
HYDRAULIC SYSTEM
L3130 17.1 to 18.1 MPa
L3430 174.4 to 184.6 kgf/cm
L3830 2480 to 2625 psi
18.1 to 19.1 MPa
L4630
184.6 to 194.8 kgf/cm
L5030
2625 to 2770 psi
0.2 mm (0.0079 in.)
0.4 mm (0.0157 in.)
2
2.7 kgf/cm
38.4 psi
(4) Adjusting Shim
(5) Washer
49.0 to 68.6 N·m
5.0 to 7.0 kgf·m
36.2 to 50.6 ft-lbs
(6) Adjusting Shim
(7) Washer
(8) O-ring
(9) Plug
KiSC issued 02, 2007 A
2
2
W1014806
W1015237