8-S11
L4400 , WSM
HYDRAULIC SYSTEM
(4) Relief Valve (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 hose 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 : 40 to 60
°
C (104 to 140
°
F)
(Reference)
• Thickness of shims (4) :
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
W65478932
Relief valve setting
pressure
Factory spec.
17.1 to 18.1 MPa
175 to 185 kgf/cm
2
2489 to 2631 psi
(1) Stopper
(2) Relief Plug
(3) Front Hydraulic Block
(4) Adjusting Shim
(5) Washer
(6) POsition Contorol Lever
KiSC issued 07, 2007 A
Tractor Manuals Scotland - Please Do Not Copy
Tractor Manuals Scotland
