Case 580SR Service Manual page 635

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SECTION 35 - HYDRAULIC SYSTEM 45
Removal
Position the loader backhoe on a hard level surface.
Lower the loader attachment to the ground.
Lower the stabilizers.
Position the dipper in the vertical position, with the
bucket firmly placed on the ground.
Stop the engine and relieve any residual pressure in
the backhoe and loader attachment systems by
moving the relevant control levers through all oper-
ating positions.
Disconnect the battery.
Clean the area around the control valve.
Tag and identify the position of all hoses and hydrau-
lic tubes.
Disconnect and plug all the hoses and all the hy-
draulic tubes.
Unscrew and remove clamping screws to chassis.
Remove the valve assembly from the loader back-
hoe.
Installation is removal procedure in reverse.
Disassembly
Unscrew and remove the three nuts (1), tightening
torque 27 ± 2 Nm.
Slide out the three tie bars (2).
Disassemble the end cover (3), the sections control
valves (4), (5), (6), (7), (8), (9) and (10), the inlet sec-
tion (11).
Check and possibly replace the O-rings (12) located
between the sections.