Technical data

DBW 2010 / 2012 / 2020 / 2022 / 300 / 350 9.The Repair
921
9.2.20 The replacement of the nozzle block
9.2.20.1 Dismounting
1. Open the burner head to the side (refer to 8.5.1).
2. Remove the ignition electrodes (refer to 9.2.14.1).
3. Remove the high pressure nozzle (refer to 9.2.10.1).
4. Remove the pre-heating of the nozzle block if
necessary (refer to 9.2.11.1).
5. Dismount the magnetic valve (refer to 9.2.16.1).
6. Dismount the screwed connections on the pressure
line (16, Figure 905) and take off the pressure line.
7. Remove the bolts (23) and take off the nozzle block
plate (24).
8. Remove the bolts (27), dismount and remove the
nozzle block.
9. Apply the measures pertaining to the elements in
dismounted status (refer to 9.1.1).
9.2.20.2 Mounting
1. Bring the nozzle block (15, Figure 905) in the
assembly position and fixate it with the bolts (27).
2. Tighten the bolts with 5.5 Nm.
3. Bring the nozzle block plate (24) in the assembly
position and fixate it with bolts (23).
4. Tighten the bolts with 5.5 Nm.
5. Bring the pressure line (16) in the assembly position
and tighten the bolts with 6 ± 0.6 Nm.
6. Install the magnetic valve (refer to 9.2.10.1).
7. Install the pre-heating of the nozzle block if necessary
(refer to 9.2.11.2).
8. Install the high pressure nozzle (refer to 9.2.10.2)
9. Install the ignition electrodes (refer to 9.2.14.2).
10. Turn the burner head toward inside (refer to 8.5.1).
9.2.21 The replacement of the burner fan
9.2.21.1 Dismounting
1. Dismount the burner head (refer to 9.2.8.1).
2. Dismount the engine (refer to 9.2.9.1).
3. Remove the bolts (6, Figure 909) from the nozzle
block plate (5).
4. Remove the bolts (1) and washers (2).
5. Take off the engine hanger (3) from the shaft.
6. Dismount the burner fan.
7. Apply the measures pertaining to the elements in
dismounted status.
9.2.21.2 Mounting
1. Only at the DBW 2010 / 2012: Check the clearance of
the fan wheel (refer to 9.1.1.4).
2. Bring the burner fan (4, Figure 909) in the assembly
position and fixate it with bolts (6) to the nozzle block
plate (5).
3. Tighten the bolts (6) with 5.5 Nm.
4. Install the engine hanger (3) on the shaft and fixate
with bolts (1) and washers (2).
5. The bolts will be tightened with
- 5.5 Nm + 1 Nm at the DBW 2010 / 2012
- 8.0 Nm + 10 % at the DBW 2020 / 2022 / 300 / 350.
6. Install the engine (refer to 9.2.9.2).
7. Install the burner head (refer to 9.2.8.2).