COVER 4786834 - Caterpillar

Illustration 1 g01173590
The implement and steering solenoid valve is mounted on the left side of the front frame, in the transmission compartment.
Illustration 2 g01173589
(1) Port to hoist control valve (2) Port to steering lockout valve (3) Port to steering metering pump (4) Implement and steering solenoid valve (5) Port to parking brake control valve (6) Port from brake and pilot pump (7) Port from parking brake circuitWhen implement and steering solenoid valve (4) is energized, pilot oil from port (6) flows through implement and steering solenoid valve (4) to ports (1), (2) and (3). The pilot oil flows from ports (1), (2) and (3) to the hoist and steering pilot circuits.When implement and steering solenoid valve (4) is de-energized, pilot oil flow from port (6) to the hoist and steering functions is blocked by implement and steering solenoid valve (4) .Note: If there is a fault with implement and steering solenoid valve (4) and the valve spool remains in the de-energized position, pilot oil from the parking brake control valve will flow to port (7). Pilot oil from port (7) flows through implement and steering solenoid valve (4) to the hoist and steering pilot circuits.Reference: For more information on the implement and steering solenoid valve refer to Systems Operation, Troubleshooting, Testing and Adjusting, Power Train Electronic Control System, "Solenoid Valves".