The integrated outrigger valve consists of five subas-
spooled, or the oil is trapped in the function while the
semblies; two solenoid valves, an inlet section, an
spool is in neutral. Work port B is open to the reser-
outlet section, and one or more working sections.
voir (when the spool is in neutral) due to the fact that
there are two flats ground into the end land of the
The solenoid valves are normally closed and may be
spool. These flats act as an orifice preventing the
either 12 or 24 volts. They are used to control a pilot
complete blockage of oil in this circuit. This prevents
pressure that positions the spool within the working
an unwanted pressure buildup in this circuit when
section(s). When the solenoid valves are deener-
the spool is in neutral. The flats are so small that
gized, the springs maintain the spool in a centered
when the circuit is being energized, the oil passing by
position permitting oil to flow to the pressure beyond
these flats is negligable compared to the total volume
of oil. The working section also contains two nonad-
justable relief valves and a check valve. Refer to the
The inlet section contains two inlet ports and a pres-
hydraulic schematic in the Service Manual for the
sure gauge port. It also contains an adjustable main
proper relief valve pressure settings. The check valve
relief valve. This relief valve is an adjustable pilot
in the bottom of the working section, prevents a re-
operated type and relieves back to the reservoir
verse flow of oil if the oil pressure in the working
through the exhaust (EX) port. Refer to the hydraulic
circuit is greater than the supply pressure.
schematic in the Service Manual for the proper relief
valve pressure settings.
The outlet section has two ports. One port,offset to
the side is the return from the circuit supplied by
The working section is the open center type and con-
ports A and B. The other port is for the power beyond
tains a spring centered spool which allows oil to flow
circuit as long as the working section spool is in
through the center to the pressure beyond circuit
when the spool is centered. Work port A is cylinder
the inlet section.
Remove the locknut and washer and unscrew
the needle valve seat body from the main relief valve
Remove the machine screws securing the sole-
noid valve bodies to the working section.
Remove the adjusting screw, spring and needle
Remove the retainer and washer securing the
valve from the seat body.
plunger assembly in place.
Remove the plunger and spring from the valve
Remove the plunger assembly. Remove the
stem from the plunger assembly.
If necessary, remove the plugs from the inlet
Remove the valve body from the valve housing.
Remove the spool from the valve body.
Remove the relief valve body from the port A
side of the working section.
Remove the main relief valve assembly from