Nozzle Maintenance - MCS BV 110E Manuel D'utilisation Et De Maintenance

Fuel pump maintenance
If the fuel does not reach the nozzle, it may be that the pump has seized and/or that the joint is broken. In this
case, loosen the three screws blocking the pump and verify the condition of the pump joint. Make sure that
the pump shaft has not seized. If the joint is broken, replace it with an original joint according to the type of
motor. If the pump's shaft has seized, replace it. If the pump starts to squeal and does not work correctly, it
may be that the filtering element is clogged. Proceed by removing it (see Fig. 5 and Fig. 6) and clean it using
clean fuel. Make sure that the fuel used to wash the filter is the same type of fuel used for the heater
operation. If it is not available, use compressed air. Be careful not to ruin the filtering element structure. Pay
attention when performing repairs on the pump because it works at high pressure.
Nozzle
The nozzle can be defined for all intents and purposes as the heart of the combustion system. The operation
of the entire machine depends on its correct operation. The fuel passes through it and, under the effect of the
pump pressure, it expands through the outlet, becoming finely atomised.
Figure 9 - Nozzle for diesel oil and kerosene.
The nozzle has data written on it such as the flow, in US Gal/hr or Kg/hr, that leaves the outlet at a
conventional pressure.

Nozzle Maintenance

Figure 10 - Cleaning the nozzle with a jet of air into the outlet.
Never replace the nozzle with one having different characteristics. Always use original spare parts. If the
nozzle is not working correctly, clean it using compressed air as shown in the figure.
The nozzle type is defined based on the type of heater (SEE TABLE).
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