Doosan D1146 - Injection nozzle; General descriptions; Construction; Disassembly

- 154 -
10.3.5. Injection nozzle
1) General descriptions
Pressurized fuel delivered from the fuel injection pump is sprayed into the combustion cham-
ber past the injection nozzle at proper spray pressure and spray angle, then burnt complete-
ly to achieve effective engine performance.
2) Construction
3) Disassembly
•
Clamp the nozzle assembly and remove the nozzle holder.
•
Remove the nozzle nut and components inside.
4) Inspection
•
Visually inspect the disassembled components for damage.
5) Reassembly
•
After removing carbon deposit, submerge the nozzle in diesel oil and clean it.
•
Replace all the gaskets with new ones.
•
Assemble the parts and tighten them to specified torque.
(1) At valve closed (2) At valve opened
EQM4024I
1
2
4
5
7
8
6
3
EFM2054I
1. Nozzle holder
2. Union nut
3. Shim
4. Coil spring
5. Guide bush
6. Intermediate washer
7. Cap nut
8. Nozzle