18
5.8 Purpose, Troubleshooting, Dismounting, and Replacement of the
Fuel Pump
Continued
The pre-heaters are supplied with two
pump types:
• Diesel pumps (manufactured by
Advers OOO);
• Gasoline pumps (manufactured by
Thomas Magnete).
In case of fault in a Thomas Magnete
fuel pump, it must be replaced.
In case of a fault in an Advers OOO
fuel pump, do the following:
• Check whether the lter is clean.
Remove the inlet nozzle of the
fuel pump and visually inspect the
lter. Flush it with petrol and purge
with compressed air, if necessary.
• Check air tightness of the connec-
tion between the fuel pump body
and the inlet nozzle (Fig. 11). To
check it, use air under pressure
of max. 1 kg-f/cm2. Supply the air
from the inlet after plugging the
outlet nozzle. If the connection
is not airtight, replace the nozzle
gasket (Fig. 11).
If all of the above faults are repaired,
check the capacity of the fuel pump.
The fuel pump capacity must be
4.4-3%+5% ml for diesel and 4.0
-3%+5% ml for gasoline per 100 cy-
cles. If the capacity is below or above
that specied, replace the fuel pump.
To dismount and reinstall the
fuel pump:
• Loosen the clamps and dis-
connect the fuel lines from fuel
pump nozzles
• Disconnect the wiring from the
fuel pump
• Loosen the screw on the clamp
and remove the fuel pump
Reinstall the fuel pump in the
reverse order.
Fig. 11. Fuel pump
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