The vacuum pump overheats
Insufficient or absent lubrication Verify oil and rings. Check oil pump efficiency
Low tank oil level Fill tank with oil
Excessive rotation speed Reduce rpm to the prescribed working speed
Prolonged functioning at max vacuum rate Reduce vacuum rate
Vacuum and/or exhaust line of insufficient diameter Check dimensioning
The vacuum pump does not rotate
Broken vanes: Clean inner chambers, replace vanes
- due to infiltrated solids
Check the secondary shutoff and filters of the
suction line
- due to insufficient lubrication Check the oil pump
Power transmission breakdown Check and replace the damaged parts
Ice inside the pump (during the cold season)
Remove ice and slowly start running it. Avoid
suction of water
.
Reduced performances
Four way changeover valve in idle position
Move the lever to vacuum or pressure mode end
stroke.
Four way changeover valve not correctly registered
Adjust the functioning play and lubricate
Worn vanes Replace vanes
The non-return valve leaks Clean or replace if necessary
Worn seal rings Replace
Tank gate valves or gaskets leak Replace damaged or worn parts
Tank connection pipes leak or are obstructed Replace damaged pipes
Obstructed primary shutoff or suction filter Remove and clean
Encrusted exhaust port Remove and clean
Vacuum line components are too small dimensioned Verify dimensions for pump maximum performances
Obstructed rubber couplings Replace
Unusual oil consumption
Insufficient or absent lubrication Check and adjust the lubricating pump
13. TROUBLESHOOTING
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