Carefully unscrew nozzle from nozzle fitting. Blow compressed air through nozzle orifice to free it from
dirt. Replace nozzle if necessary.
Ignition Electrodes
Clean, adjust and if necessary replace ignition electrode. For electrode gaps see Fig. 4-5 (dimensions
in mm).
Fig.4
Fig.5
Fuel pump pressure adjustment (Fig. 6)
The fuel pressure is factory set and must be checked and adjusted by qualified
technicians only. Tampering with the unit may be dangerous.
Remove pressure gauge cap (P). Connect a pressure gauge on the pressure measuring port on pump.
Start heater and read fuel pressure value. If necessary adjust pressure to the correct value turning the
adjusting screw (P1) clockwise to increase, anticlockwise to decrease the pressure:
Fig.6
Air collar
adjustment (Fig. 7)
The air collar position is factory set and must be checked and adjusted by qualified technicians
only. Tampering with the unit may be dangerous.
Pump Pressure (bar)
9.5
10.0
M1.0.WD340.EN
