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Chapter 8 FUEL SYSTEM
2.2 Fuel Injection Nozzle - Disassemble and Inspect
Understanding of the current engine condition before disassembling is very important to know the cause of trouble and do the
efficient work.
Depending on the maintenance work or purpose, it is desirable to inspect some of the following items before proceeding with
any job.
Fuel Injection Start Pressure - Inspect
Fuel Injection Nozzle Spray - Inspect
Fuel Injection Nozzle - Disassemble and Inspect
Note: Nozzle tip, spacer, and nozzle spring must be replaced with new ones as a set.
2
3
4
5
6
7
8
9
10
1
Needle valve contact portion wear
Replace
Replace
Replace
Replace
Carbon deposit, nozzle hole clogging,
needle valve sticking
Deformation, deterioration, flaw
Screw adjustment type spec
Disassembling Sequence
1 Set screw, sealing washer
2 Cap nut, sealing washer
3 Adjusting screw
4 O-ring
5 Retaining nut
6 Nozzle tip
7 Spacer
8 Push rod, nozzle spring, spring seat
9 O-ring
10 Nozzle holder
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