LAMP GP-FLOOD 6C2459 - Caterpillar

Reading of a Vacuum Above 200 Millitorr
Visually check and torque all fittings, ports, and connections in order to address any obvious faulty workmanship. If no faults are found, the pump needs to be dead-headed with a gauge. Check the pump in order to determine if the pump can pull 10 millitorr vacuum. Reading of a Vacuum 35 to 200 Millitorr
The vacuum pump must be operating. With the vacuum pump in operation, spray methanol on the potential vacuum leaks. Carefully eliminate the following possible source of problems:
pins (armature)
"Comm/Accel" sensor
ports on top of flywheel
ports on bottom of flywheel
sensor port for the vacuum
bearing cartridges
temperature sensors
9-pin temperature sensor
vacuum hoses
elbows Observe the pressure reading for the vacuum with UPSView. If the vacuum rises from 10 millitorr to 30 millitorr, then that location is one source of the vacuum leak. A repair needs to be made to any sources of vacuum leaks. If no leaks are found, then the vacuum pump needs to be dead headed with a gauge. Check the vacuum pump in order to determine if the vacuum pump can pull a vacuum of 10 millitorr.Dead Head Testing of the Vacuum Pump
Verify that the system is in bypass mode. Verify that the flywheel is disengaged.
De-energize the vacuum pump.
Disconnect the input vacuum hose and the 90 degree elbow assembly between the flywheel and the right side of the vacuum pump.
Connect the 295-5409 Adapter Plate into the fitting for the vacuum pump. See Step 3.
Connect the 200-8452 Vacuum Sensor to the 295-5409 Adapter Plate .
Wire the ethernet cable from the sending unit to the "J10" connector on the flywheel interface board. The existing ethernet cable that is attached to the board will need to be temporarily removed.
Energize the pump. Observe if vacuum is being pulled to less than 10 millitorr on UPS HMI or UPSView.
If vacuum is pulled, then the pump is good. The vacuum system that is external to the pump has a leak.If troubleshooting procedures uncover no problem, then the flywheel may be faulty. Contact Caterpillar technical support .