DBW 2010 / 2016 9Repair
916
9.2.15 Replacing fuel pump
9.2.15.1 Removal
1. Swing away burner head (see 8.5.1).
2. Remove ignition electrodes (see 9.2.14.1).
3. Remove banjo bolts (22, Fig. 912) and washers (21), take
off fuel lines (20) and remove.
4. Loosen screw fittings on pressure line (16), take off pres-
sure line and remove.
5. Remove screws (23) and take off nozzle holder plate (24).
6. Remove circlip (26), take off spur gear (25) and remove.
7. Remove screws (17) and washers (18), take off fuel pump
(19) and remove.
8. Carry out works on stripped down components (see
9.1.1).
9.2.15.2 Installation
1. Move fuel pump (19, Fig. 912) into installation position
and fasten with screws (17) and washers (18).
2. Tighten screws to 3.0 Nm.
3. Lay on spur gear (25) and secure with circlip (26).
4. Fit nozzle holder plate (24) and fasten with screws (23).
5. Tighten screws to 5.5 Nm.
6. Move pressure line (16) into installation position and
tighten screw fittings to 6 ± 0.6 Nm.
7. Move fuel lines (20) into installation position and fasten
with banjo bolts (22) and washers (21).
8. Tighten banjo bolts to 15 ± 1.5 Nm.
9. Install ignition electrodes (see 9.2.14.2).
10. Swing in burner head (see 8.5.1).
9.2.16 Replacing solenoid valve
9.2.16.1 Removal
1. Swing away burner head (see 8.5.1).
2. Remove ignition electrodes (see 9.2.14.1).
3. Remove nozzle holder pre-heating unit (see 9.2.11.1).
4. Remove screws (23, Fig. 912) and take off nozzle holder
plate (24).
5. Disconnect electrical connections on solenoid valve.
6. Remove nut (1, Fig. 914), take off solenoid valve head (3)
and washer (2) and remove.
7. If necessary, screw off solenoid valve body (4) “o” ring
(5), pin (6), spring (7) and bolt (8) .
8. Carry out works on stripped down components (see
9.1.1).
9.2.16.2 Installation
1. Place “o” ring (5, Fig. 914) on solenoid valve body (4).
2. Fit spring (7) and pin (6) in bolt (8).
3. Guide bolt with spring and pin into solenoid valve body
(4).
4. Screw solenoid valve body (4) into nozzle holder (9).
5. Tighten screws to 11.5 Nm.
6. Place solenoid valve head (3) on solenoid valve body and
fasten with washer (2) and nut (1).
7. Tighten nuts to 2 Nm.
8. Fasten nozzle holder plate (24, Fig. 912) with screws (23).
9. Tighten screws to 5.5 Nm.
10. Install nozzle holder pre-heating unit (see 9.2.9.2).
11. Install ignition electrodes (see 9.2.12.2).
12. Make the electrical connections to solenoid valve.
13. Swing in burner head (see 8.5.1).
9.2.17 Replacing combustion chamber
9.2.17.1 Removal
1. Swing away burner head (see 8.5.1).
2. Pull combustion chamber (1, Fig. 915) out of the heat
exchanger (2) and remove it.
3. Carry out works on stripped down components (see
9.1.1).
9.2.17.2 Installation
1. Slide combustion chamber (1, Fig. 915) into heat
exchanger (2) up to stop.
2. Swing in burner head (see 8.5.1).
9.2.18 Thermostat of nozzle holder pre-heating
unit
9.2.18.1 Removal
1. Swing away burner (see 8.5.1).
2. Disconnect electrical connection.
3. Screw thermostat (4, Fig. 913) off nozzle holder plate (7)
or disc (1) and remove with screw (5), lug (6) or nut (3)
and serrated lock washer (2).
4. Carry out works on stripped down components (see
9.1.1).
9.2.18.2 Installation
1. Move thermostat (4, Fig. 913) into installation position
and fasten with lug (6) and screw (5) on nozzle holder
plate (7) or with nut (3) and serrated lock washer (2) on
disc (1).
2. Make the electrical connection.
3. Swing in burner (see 8.5.1).
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