Introduction
This manual provides essential information for the safe and efficient operation, setup, and maintenance of your Mastercool 3 CFM Two Stage Vacuum Pump. Please read these instructions thoroughly before using the pump to ensure proper function and to prevent damage or injury.

An image showing the Mastercool 3 CFM Two Stage Vacuum Pump. The pump features a silver-colored housing with an oil level sight glass on the front, clearly marked 'OIL' and 'LEVEL'. A blue label on the front indicates 'Mastercool 3 CFM, TWO STAGE'. On the top, brass fittings and control valves are visible, along with a black carrying handle. A label on the side lists specifications such as 'Free Air Displacement: 3 CFM', 'Ultimate Vacuum: 15 Microns', 'Voltage: 110/220 V, 50/60 HZ', and 'Power: 1/4 HP'.
Safety Information
Always observe the following safety precautions:
- Wear appropriate personal protective equipment, including safety glasses and gloves.
- Ensure the pump is connected to a properly grounded electrical outlet with the correct voltage (110/220 V, 50/60 Hz).
- Do not operate the pump in wet conditions or near flammable materials.
- Avoid touching hot surfaces during or immediately after operation.
- Keep children and unauthorized personnel away from the operating area.
- Always disconnect power before performing any maintenance or service.
Setup
- Unpacking: Carefully remove the vacuum pump from its packaging. Inspect for any shipping damage.
- Oil Filling:
- Remove the oil fill cap.
- Pour vacuum pump oil (not included) into the oil reservoir until the oil level is between the 'OIL' and 'LEVEL' marks on the sight glass. Do not overfill.
- Replace the oil fill cap securely.
- Electrical Connection: Connect the power cord to a suitable electrical outlet (110/220 V, 50/60 Hz). Ensure the power switch is in the 'OFF' position before connecting.
Operating Instructions
- Connect to System: Attach the vacuum pump to the system requiring evacuation using appropriate hoses and fittings. Ensure all connections are tight to prevent leaks.
- Start Pump: Turn the power switch to the 'ON' position. The pump will begin to operate.
- Monitor Vacuum: Observe the system's vacuum gauge to monitor the evacuation process. Allow the pump to run until the desired vacuum level is achieved (e.g., 15 microns for ultimate vacuum).
- Shut Down:
- Close the valve between the pump and the system.
- Turn the power switch to the 'OFF' position.
- Disconnect the hoses from the pump.
Maintenance
- Oil Changes: Regularly check the oil level and clarity through the sight glass. Change the vacuum pump oil after every 10-20 hours of operation or if it appears discolored or contaminated. Refer to the oil fill instructions in the Setup section.
- Cleaning: Keep the exterior of the pump clean and free of debris. Do not use harsh chemicals that may damage the finish.
- Storage: When not in use, store the pump in a clean, dry environment. Ensure all ports are capped to prevent contamination.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not start | No power, faulty switch, motor issue | Check power connection, inspect switch, consult qualified technician |
| Pump not pulling vacuum | Leaking connections, low oil, contaminated oil, faulty pump | Check all connections, add/change oil, consult qualified technician |
| Excessive noise | Low oil, worn components | Check oil level, consult qualified technician |
Specifications
- Model: 90063-2V-110B
- Free Air Displacement: 3 CFM
- Ultimate Vacuum: 15 Microns
- Voltage: 110/220 V, 50/60 Hz
- Power: 1/4 HP
- Item Weight: Approximately 20 Pounds
- Material (Sight Glass): Glass
Warranty Information
This Mastercool product is covered by a limited warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the warranty card included with your purchase or visit the official Mastercool website. Keep your proof of purchase for warranty claims.
Customer Support
For technical assistance, replacement parts, or service inquiries, please contact Mastercool customer support. Refer to the contact information provided in your product packaging or on the official Mastercool website.
Mastercool is a registered trademark.





