 | |
| Illustration 1 | g01267892 |
(1) Steering pressure switch | |
One pressure switch monitors the condition of the steering system.
Pressure switch (1) monitors the output of the steering piston pump. The steering pressure switch is mounted in the Steering check and relief valve (2) .
The Caterpillar monitoring system is designed in order to alert the operator of an immediate problem or impending problem in the steering system or other machine systems.
The steering pressure switch (1) 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 steering pressure 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 behind the cab. The secondary steering relay behind the cab will then energize a second larger relay that is located on the frame near the front left 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 steering check and relief valve (2) .
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 if the ground speed is above 8 km/h (5 mph).