Relief Valve (For Three Point Hydraulic System) - Kubota L2800 Workshop Manual

L2800, L3400, WSM

(4) Relief Valve (for Three Point Hydraulic System)

Tractor Manuals Scotland - Please Do Not Copy
Tractor Manuals Scotland
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.
Relief valve setting
pressure
Condition
• Engine speed : Maximum
• Oil temperature : 45 to 55 °C
(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
38.4 psi
(1) Stopper
(2) Relief Plug
(3) Front Hydraulic Block
8-S11
HYDRAULIC SYSTEM
15.7 to 16.2 MPa
Factory spec. 160 to 165 kgf/cm
2276 to 2347 psi
113 to 131 °F
2
(4) Adjusting Shim
(5) Washer
2
W1019974
KiSC issued 08, 2007 A