VEVOR Vacuum Pump User Manual

Introduction

This user manual provides essential information for operating and maintaining VEVOR vacuum pumps. VEVOR is committed to offering competitive tools, with pricing expressions like "Save Half" being estimates of potential savings compared to major top brands.

Please read all instructions carefully before operating the vacuum pump. VEVOR reserves the right to interpret its user manual. The product appearance is subject to the received item. Updates to technology or software will not be individually notified.

Contact Information: For product questions or technical support, visit www.vevor.com/support.

I. Pump Components

The vacuum pump consists of the following main components:

• Exhaust Fitting
• Sight Glass
• Die-Cast Aluminum Housing
• Oil Drain
• Handle
• Fan Cover
• Motor
• Base
• Oil Fill Cap

II. Operating Manual

1. Before Using Your Vacuum Pump

Ensure the pump is ready for operation:

• Verify that the voltage and frequency of the power outlet match the specifications on the pump motor decal.
• Confirm the ON-OFF switch is in the OFF position before plugging in the pump.
• Remove and discard the exhaust cap from the pump's handle.
• The pump is shipped without oil. Fill the reservoir with oil by removing the Exhaust Fitting cap. Add oil until it just shows in the bottom of the sight glass. The approximate oil capacity is 180-800ml (refer to technical data).
• Replace the Exhaust Fitting cap and remove the cap from one of the inlet ports.
• Turn the motor switch to ON. Once the pump runs smoothly, replace the cap on the inlet port. This may take 2-30 seconds depending on ambient temperature.
• After approximately one minute of operation, check the sight glass for the proper oil level. The level should align with the sight glass oil level line. Add oil if necessary.

Note: Proper oil level is crucial for performance. Underfilling leads to poor vacuum, while overfilling can cause oil to blow from the exhaust.

2. To Shut Down Your Pump After Use

Follow these procedures to prolong pump life and ensure easy starting:

• Close the manifold valve between the pump and the system.
• Remove the hose from the pump inlet.
• Cap the inlet port to prevent contamination or loose particles from entering.

III. To Maintain Your High Vacuum Pump

1. Vacuum Pump Oil

The type and condition of the oil are critical for achieving the ultimate attainable vacuum. VEVOR recommends using High Vacuum Pump Oil, which is formulated to maintain maximum viscosity at normal running temperatures and improve cold weather starts.

2. Oil Change Procedure

Regular oil changes are essential for maintaining pump performance:

1. Ensure the pump is warmed up before changing the oil.
2. Remove the OIL DRAIN cap. Drain the contaminated oil into a suitable container for proper disposal. You can assist oil removal by opening the inlet and partially blocking the exhaust with a cloth while the pump is running (do not operate for more than 20 seconds this way).
3. Once oil flow stops, tilt the pump forward to drain any residual oil.
4. Replace the OIL DRAIN cap. Remove the exhaust fitting and fill the reservoir with new vacuum pump oil until the oil just shows at the bottom of the sight glass.
5. Ensure inlet ports are capped and turn on the pump. Let it run for one minute, then check the oil level. Add oil slowly (while running) if the level is below the OIL LEVEL line on the sight glass. Replace the exhaust fitting and ensure the drain cap is tight.
6. For badly contaminated oil: If sludge forms due to water collection, you may need to remove the oil reservoir cover and wipe it clean. Alternatively, while the pump is running and warmed up, remove the oil drain cap and slightly restrict the exhaust. This back-pressures the reservoir, forcing oil out and carrying more contamination. Repeat until contamination is removed. Replace the OIL DRAIN cap and refill with fresh oil to the proper level.

IV. Troubleshooting Guide

This guide helps resolve common issues. Note that disassembly may void the warranty if caused by misuse or tampering.

1. Failure To Start

• Check the line voltage. The pump requires ±10% line voltage (loaded) at 32°F for starting. Extreme conditions might cause switching between start and run windings.

2. Oil Leakage

• Ensure the oil is not a residual accumulation from spillage.
• If leakage is present, the module cover gasket or shaft seal may need replacement.
• If leakage occurs at the oil drain plug, reseal the plug using commercial pipe thread sealer.

3. Failure To Pull A Good Vacuum

• Verify the vacuum gauge and all connections are in good condition and leak-free. You can test for leaks by monitoring vacuum with a thermistor gauge while applying vacuum pump oil at connections or suspected leak points. Vacuum may improve briefly as oil seals leaks.
• Ensure the pump oil is clean. Heavily contaminated pumps might require multiple oil flushes.
• Check that the oil is at the proper level. For optimal operation, the oil should be even with the OIL LEVEL line on the sight glass when the pump is running. Do not overfill, as operating temperatures cause oil expansion. To check, start the pump with the inlet capped and observe the oil level. Add oil if necessary.

V. Technical Parameters

The following table details the specifications for various VEVOR vacuum pump models:

VI. Exploded Drawing

The following lists the components shown in the exploded diagram:

• 1. Fan cover
• 2. Cross screw
• 3. Fan
• 4. Motor cover
• 5. Cross screw
• 6. Bearing
• 7. Motor rotor
• 8. Power supply cords
• 9. Power switch
• 10. Centrifugal switch
• 11. Motor stator
• 12. Capacitor
• 13. Oil drain cap
• 14. Handle
• 15. Trestle
• 16. Screw
• 17. Rubber foot
• 18. Cap board
• 19. Exhaust fitting
• 20. Die cast aluminum housing
• 21. Sight glass
• 22. Oil drain cap (duplicate number)
• 23. Screw
• 24. Seal
• 25. Screw
• 26. Rubber foot (duplicate number)
• 27. Base