INSULATION AS 4384599 - Caterpillar

steering control manifold combines the function of the solenoid valve and manifold (steering disable) and the check and relief valve (steering)The steering disable valve allowed the machine to be serviced behind the front wheels when the engine is in operation. The machine must be in park in order to perform any service operation. When the machine lockout switch is toggled, a signal is sent to the Chassis ECM. The Chassis ECM energizes the steering disable solenoid. The machine can be serviced behind the front wheels safely because of the steering disable valve.The secondary steering check and relief valve acted as a manifold for the primary steering system and the secondary steering system. Pressure oil from the steering piston pump or the brake release and secondary steering pump flows to the steering check and relief valve. The steering check and relief valve sends pressure oil to the steering metering pump or to the steering hydraulic tank.