PILOT-OPERATED CHECK VALVE
There are two different types of pilot-operated check
valves utilized in the outrigger circuit.
The valve is located on the inside frame rail near the
integrated outrigger valve. The purpose of the valve
is to prevent reverse flow from the piston side of the
The valve is located in the outrigger stabilizer port
outrigger cylinders. Incorporated within the valve
block. The check valve provides two functions; the
cartridge is a thermal relief valve set to open at 4000
first function is a holding valve, the second function
psi (27,580 kPa).
provides a thermal relief of the stabilizer.
For more detailed information and maintenance of the pilot-operated
check valves, refer to VALVES in Section 8 - HYDRAULIC SYSTEM.