Guide showing how to remove your old vacuum pump and fittings to replace with a new one.
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Tools and Supplies:
- Lifting Straps
- 7mm
- 1/2" wrench
- 5/8" wrench
- Crane / Forklift
- Monkey wrench
- 5/16" nut driver
- 9/16" wrench
- 10 mm
- Adjustable wrench
- 3/4" wrench
- Loctite 89
Turn off the air, water, and power at the source and machine.
Disconnect the air and water lines from the pump. Unplug the sensor.
Note: allow the water to drain after disconnecting the water hookup.
Unscrew the 4 bolts for the electrical junction box cover.
Qualified Electrician is recommended for wiring portion.
Remove the wired connections and pull them through the access hole
Remove the 4 bolts securing the pump to the mount plate; after the final bolt, catch the clamping plate attached to the underside of the mount plate.
Remove the pump from its platform.
Strip the old pump: remove the manifold, discharge assembly, relief valve, vacuum seal water, and cord connector, and gaskets.
Note: check for wear and tear; replace if necessary.
Attach the manifold, discharge assembly, relief valve, vacuum seal water, cord connector, and gasket to the new pump.
Pass the bolts through the pump, rubber feet, mount plate, and clamping plate; attach and tighten a nut onto the bolt’s threaded end to secure the new pump to the machine.
Note: avoid flattening the rubber feet as you tighten the bolts.
Insert the wires through the cord connector to the electrical junction box, connecting them to the pump.
Note: refer to the wiring diagram on the motor nameplate when attaching the wires
Seal the electrical junction box.
Attach the air and water lines to the pump.
Turn on the water, air, and power at the source and machine. Check for leaks.
Quick cycle the pump on and off to confirm a clockwise rotation of the motor: Watch the fan on the end of the motor. The arrow sticker on the fan shows the proper motor rotation.
The regulator should read 10 psi or 3 gallons per minute from vacuum pump discharge
Confirm the vacuum relief valve is set correctly. See Replace - 5 HP Vacuum Relief Valve Service Guide
How To Replace 5HP Vacuum Relief Valve