GEAR ASSEM. (47 teeth) 7N8244 - Caterpillar

Low Service Brake Oil Pressure
Illustration 1 g01416049
Location of the brake accumulator oil pressure switches (1) Brake accumulator oil pressure switch - alert indicator (2) Brake accumulator oil pressure switch - brake applicationWhen the engine is started, brake accumulator oil pressure increases. When the oil pressure reaches the actuation pressure for pressure switch (2), the switch will close. The Power Train/Chassis ECM receives this signal and will allow the parking brake to be disengaged.
Illustration 2 g01417865
Caterpillar Monitoring System display (3) Brake accumulator oil pressure alert indicatorWhen the oil pressure increases to the actuation pressure for pressure switch (1), the pressure switch will close. The Power Train/Chassis ECM receives a signal from the oil pressure switch. The Power Train/Chassis ECM then sends a signal to the Caterpillar Monitoring System over the CAT Data Link. The Caterpillar Monitoring System will then turn off brake accumulator oil pressure alert indicator (3) on the Caterpillar Monitoring System display.If brake accumulator oil pressure decreases to the deactuation pressure for pressure switch (1), the switch will open. The Power Train/Chassis ECM receives this signal and sends it to the Caterpillar Monitoring System. The Caterpillar Monitoring System will activate alert indicator (3) .If machine operation is continued and brake accumulator oil pressure decreases to the deactuation pressure for pressure switch (2), pressure switch (2) will open. The Power Train/Chassis ECM receives this signal and engages the parking brake.Once the parking brake has been engaged, the parking brake will remain engaged until the brake accumulator oil pressure rises above the actuation pressure for pressure switch (2). The operator must then cycle the parking