8-S11
L2800, L3400, WSM
HYDRAULIC SYSTEM
(4) Relief Valve (for Three Point Hydraulic System)
Relief Valve Setting pressure
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. Remove the position control lever stopper (1).
4. Start the engine and set at maximum speed.
5. Move the position control lever all way up to operate the relief
valve and read the gauge.
6. 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).
7. After the relief valve setting pressure test, reset the position
control lever stopper firmly.
Condition
• Engine speed : Maximum
• Oil temperature : 45 to 55 °C
113 to 131 °F
(Reference)
• Thickness of shims (4) :
0.1 mm (0.0039 in.)
0.2 mm (0.0078 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
W1019974
Relief valve setting
pressure
Factory spec.
15.7 to 16.2 MPa
160 to 165 kgf/cm
2
2276 to 2347 psi
(1) Stopper
(2) Relief Plug
(3) Front Hydraulic Block
(4) Adjusting Shim
(5) Washer
Tractor Manuals Scotland - Please Do Not Copy
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