GASKET MAKER 1853984 - Caterpillar

Secondary Steering System Operation
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(13) Pump and Motor (secondary steering) (brake release) (prelubrication) (high speed oil change - quickevac) (24) Plug for the main relief valve on the secondary steering system
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(25) Action light (26) Alert indicator for the Secondary steering (27) Secondary steering indicator (28) Brake release and secondary steering switchSteering hydraulic tank (17) also supplies oil to pump and motor (secondary steering) (brake release) (prelubrication) (high speed oil change - quickevac) (13) .Pump and Motor (secondary steering) (brake release) (prelubrication) (high speed oil change - quickevac) (13) is located on the crossmember under the rear of the engine. Pump and Motor (secondary steering) (brake release) (prelubrication) (high speed oil change - quickevac) (13) provides oil in order to steer the front wheels if the normal flow is lost from the primary steering system or if the engine stops.Pump and Motor (secondary steering) (brake release) (prelubrication) (high speed oil change - quickevac) (13) operates according to the position of brake release and secondary steering switch (28) that is located in the cab. During normal machine operation, brake release and secondary steering switch (28) is placed in the AUTO position. The brake release and secondary steering pump will only operate when additional pressure oil is needed in the steering system.When the engine is started, the Transmission and the Chassis Electronic Control Module (Transmission/Chassis ECM) activates a relay that is located behind the cab. The relay behind the cab activates a larger relay that is located on the inside of the left frame rail next to the engine. Then, the larger relay activatespump and motor (secondary steering) (brake release) (prelubrication) (high speed oil change - quickevac) (13). The brake release and secondary steering pump will operate for three seconds. Secondary steering indicator (27) will turn on when the pump is operating.Brake release and secondary steering switch (28) is moved to the MANUAL position only when the machine is towed. This switch sends a signal to the Transmission/Chassis ECM. The Transmission/Chassis ECM then activates the pump and motor (secondary steering) (brake release) (prelubrication) (high speed oil change - quickevac) (13) and the secondary steering indicator.The monitoring system is designed to alert the operator of an immediate problem in the steering system or in other machine systems. The monitoring system also alerts the operator about an impending problem in the steering system or in other machine systems.If the steering system pressure decreases to the deactuation pressure of the pressure switch, steering pump pressure switch (7) will send an electrical signal to the Transmission/Chassis ECM. Secondary steering warning indicator (26) will flash when the steering pressure is low. Secondary steering indicator (27) will turn ON when the pump is operating. The Transmission/Chassis ECM will then activatepump and motor (secondary steering) (brake release) (prelubrication) (high speed oil change - quickevac) (13) .Load sensing signal pressure oil will flow through load sensing valve (10) and shuttle valve (9) to the steering metering pump. The load sensing signal pressure moves the spool of the load