10
DEF & Diesel Fuel Boss™
English
TROUBLESHOOTING
CONDITION
POSSIBLE CAUSE
REMEDY
Pump does not
run
1)
No electrical power
to pump
1)
Check electrical
connections,
extension cable (If
applicable) and fuse.
Pump runs
slowly with low
fuel flow
1)
Low voltage supply
1)
Test power supply
and ensure adequate
voltage.
Pump runs, but
no fuel delivery
1)
Tank level too Low
2)
Clogged suction line
or filter
3)
Air leak in suction
side
4)
Dispensing nozzle
malfunctioning
5)
Damaged rotor/
vanes
1)
Add fuel to tank
2)
Clean suction line
and filters.
3)
Check all fittings for
leaks - tighten clamps.
4)
Remove nozzle from
hose and test pump.
5)
Remove end cover
by first undoing the
three socket head
screws and lifting
off cover. Inspect for
damage.
