PAS V3 Pump for Fuel Dispensers
Component Technical Manual
Page 3-2
Document Ref 903647-001 Rev 3
3
FAILURE DIAGNOSIS
SAFETY
1)
Take the standard safety measures into account: place safety equipment and signs and switch off
the electric power supply.
2)
When the PAS V3 is stopped make sure that the pump is not pressurised due to closing of the vent
float valve. When unscrewing the top vent plug (reference [9] in the schematic diagrams of
operating principles), the pressure can be released by pushing the float down carefully with a pin.
3.1
Failure Diagnosis
1)
No fuel flow
2)
Reduced fuel flow
3)
Uneven (pulsing) fuel flow
4)
Closing of the overflow valve
5)
Excessive noise
•
Prior fault diagnosis/search:
•
Check the condition of the belt drives.
•
Following any repair action :
Make sure that all the necessary procedures required by Weights & Measures and Safety
are fully applied.
REMARK
Once an O-ring has been removed, it must not be re-used.
Issue B
Open the vent plug
If there is no air coming from the
air-vent when the filterbox cover is
removed, the vent float is closed and
the PAS pressurised. By pushing a
small screwdriver or pin through the
hole, the pressure can be released.
