4.3.5 Injection nozzle
1) General descriptions
Pressurized fuel delivered from the fuel injection pump is sprayed into the combustion chamber past the
injection nozzle at proper spray pressure and spray angle, then burnt completely 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 seal rings with new ones.
Assemble the parts and tighten them to specified torque.
SPC000006 5ton Diesel Engine
Page 106
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