SPACER-SPECIAL 9N2481 - Caterpillar

Drain the Oil
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(1) Electrical Input Connector (2) Indicator (Voltage) (3) Lifting Handle (4) Intake Port (Vacuum) (5) Control (Gas Ballast) (6) Oil Filler Plug (7) Exhaust Port (8) Sight Glass (Oil Level) (9) Oil Drain Valve (10) Rubber Feet (11) Mode Selector (12) Power Switch (13) Cover (Fan) (14) Direction of Rotation (15) Drain Valve Assembly
Illustration 2 g00931064
(1) Electrical Input Connector (2) Indicator (Voltage) (4) Intake Port (Vacuum) (5) Control (Gas Ballast) (6) Oil Filler Plug (7) Exhaust Port (8) Sight Glass (Oil Level) (9) Oil Drain Valve (15) Drain Valve Assembly
Illustration 3 g00930911
Front View
Illustration 4 g00930912
Right View (Removed Panel)
Risk of electric shock or energy hazard. Parts inside this UPS are energized by the flywheel even when the AC power is disconnected.
Do not use pliers or other mechanical means other than fingers to adjust the vacuum pump mode selector switch. Failure to observe this note may result in damage to the pump and the inability of the system to reach the required operating pressure.
After operating the system for any period of time, the vacuum pump oil reservoir should be drained and refilled with new oil. If storage is anticipated or if vacuum pump shutdown is anticipated for more than 30 days, the vacuum pump oil reservoir should be drained and refilled with new oil. The pump should be allowed to come to operating temperature prior to draining the oil.Pump service is not required when the pump is left running while the system is shut down. In this case, the time required to restart the system will be minimized.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
If the system has been shut down and the pump is cool, run the pump for approximately 10 minutes prior to changing the oil. This will decrease viscosity of the oil and the oil will drain easier.
Place the system in the Bypass Mode.
Shut down the vacuum pump by moving switch (12) to the OFF position.
The drain oil is hot and can cause burns. Operating temperature of the oil is typically 60 °C (140 °F) or higher.Avoid skin contact with the oil.
Drain the oil from the system into a suitable container for storage or disposal.Note: A tube that has a 9.4 mm (0.37 inch) inner diameter may be used in order to direct the flow of the oil.
Open gas ballast (5). Turn dial (5) to the II position.
Remove one of the oil filler plugs (6) .
Open oil