Troubleshooting

Issue - Lack of Vacuum in Tank:

• Tank not closed or leaking
• Collapsed Hose: Check wear and replace
• Stuck automatic floating shut-off: Put Pump on Pressure for a moment
• Pump running backward after stopping: Stuck or broken non-return valve (Back-up Valve)

Issue – Overheating:

• Lack of oil
• Wrong type of oil (See FAQ)
• Cooling fins of casing plugged with dirt
• Pump run for too long WITHOUT air passing inside the pump (See Manual)
• RPM too high
• Broken oil pump
• Clogged oil line
• Collapsed hose
• Clogged filter or muffler

Issue – Pump not Turning:

• Foreign material may be lodged in pump
• Pump frozen up (winter conditions)
• Vane or Housing broken
• Pump overheated

NOTE: A slight metallic noise at high vacuum (above) 23-24Hg is normal. The expanded air is too weak to hold the non-return valve (back-up valve) completely open and consequently causes the closing disk to flutter.