WRENCH-BOX 6V4168 - Caterpillar

Illustration 1 g00727799
(1) Flow switchOne flow switch monitors that condition of the steering system.Flow switch (1) monitors the output of the steering pump. Flow switch (1) is attached to the flow control valve that is located on the frame behind the right front suspension cylinder. The Caterpillar Monitoring System is designed to alert the operator of an immediate problem or of an impending problem in the steering system or in other machine systems.The flow switch is connected to the monitoring system. The alarm will sound and the action light and secondary steering warning indicator will flash until the steering pressure reaches the deactuation pressure. If the system pressure drops to the actuation pressure, the alarm should sound and the action light should flash. The flow switch (1) is also connected to the Power Train Electronic Control Module (Power Train ECM). If the system pressure is below the deactuation pressure, the Power Train ECM will energize the secondary steering relay that is located in the cab. The secondary steering relay will energize a larger relay that is located on the frame near the left front suspension cylinder. The larger relay will activate the brake release and secondary steering pump. The brake release and secondary steering pump will send oil to the flow control valve. If the alarm sounds and the alert indicator is flashing, this is an indication of a loss of primary steering flow. The brake release and secondary steering pump will provide enough flow in order to allow the operator to steer the machine to a safe location off the road.Note: A warning is displayed only when the ground speed is above 8 km/h (5 mph).