WRENCH AS-STRAP 2P8250 - Caterpillar

Note: The pump is internally configured for 240 VAC operation. To operate the vacuum pump prior to energizing the UPS, temporarily disconnect the 240 VAC internal wiring to the receptacle on the right side of the pump. Connect a 240 VAC line cord from an external source. Ensure that you have removed the external 240 VAC source. Reconnect the internal 240 VAC wiring to the receptacle for the vacuum pump prior to energizing the input terminal of the UPS. Reconfiguration of the vacuum pump for 120 VAC operation will void the warranty of the pump.Note: The vacuum pump has a tamperproof label. This prohibits the service technician from reconfiguration of the pump and utilization of a 120 VAC source in order to begin the process of vacuum draw on the flywheel during the commissioning procedure. A tamperproof label that is corrupted will void any warranty claim that is associated with the vacuum pump.
When you change the bearing reloaders in order to install bearings, do not run the vacuum pump. The vacuum pump could circulate contaminants from the outside air into the system.
When you change the bearing reloaders in order to install bearings, complete the procedure in a timely manner.
Perform a thorough inspection of the vacuum lines and connection points. Look for any possible discrepancies that could result in a vacuum leak.
To ensure that the vacuum pump oil is clean, change the oil. Contaminants in the oil will extend the time that is required to draw a vacuum. Dirty oil may also prevent a vacuum from being drawn at all.
Do not overfill the vacuum pump oil beyond the level/fill line. The pump capacity is 0.7 L. The vacuum pump will leak if the pump oil is overfilled.
Remove all of the plugs on the flywheel. Apply grease to the O-rings. A sealed vacuum vessel is crucial in order to avoid problems at start-up mode.
To minimize the time for vacuum draw, the flywheel should be recharged with nitrogen. Because the flywheel is a casting, there will be some leakage of the charged nitrogen over time. To ensure that the flywheel stays dry and free from water vapor, charge the flywheel with a slight positive pressure of dry nitrogen. This will ensure that the UPS is able to achieve vacuum levels quickly at start-up mode.
Remove the air bubbles from the vacuum system by turning the switch for the ballast from the 0 position to the II position. The switch for the ballast is located on the top middle of the pump behind the exhaust port. Run the pump for 1 hour. Return the switch for the ballast to the 0 position and allow the pump to pull a vacuum. If a vacuum of less than 35 Millitorr cannot be drawn in a reasonable amount of time (3 hours or less), follow the procedures in the following sections:
"Reading of a Vacuum Above 200 Millitorr"
"Reading of a Vacuum 35 to 200 Millitorr"Reading of a Vacuum Above 200 Millitorr
Visually check and torque all fittings, ports,