No Vacuum; System Troubleshooting - NVE 866 Challenger Series Owner's Manual

No vacuum _______________________________________________________

• Suction valve is in neutral
• Worn seals or vanes
• Pump is not turning fast enough
• Check valve or suction valve is clogged
• Leak in the tank or fittings
• Collapsed hose between the pump and shutoffs
• Ballast filter clogged

System Troubleshooting _______________________________________

Locating the source of the trouble
If you notice a decrease in pump performance, start troubleshooting at
the pump.
• Remove the suction and discharge hoses at the pump
• Start the pump and run it in vacuum only at its normal rpm
• Check the vacuum level at the pump inlet. The 866 Challenger
in new condition will develop 27-28.5" hg.
• If the pump checks out ok, check the vacuum level at the
secondary, then the primary shutoff. Keep working your way
back until you find the problem.
For rebuild instructions please visit our website at
www.nvepump.com or call us at 800-253-5500.
www.fraserwoods.ca
866 Challenger Series | 19