2) 1-spring type (DE12T)
(1) Disassembly
1. Cap nut
2. Adjusting screw
3. Spring
4. Push rod
5. Connector
6. Retaining nut
7. Needle valve
8. Nozzle
9. Nozzle holder
(2) Reassembly
•
After removing carbon deposit, sub-
merge the nozzle in diesel oil and
clean it.
•
Replace all the gaskets with new
ones.
•
Assemble the parts and tighten them
to specified torque.
(3) Adjustment
•
Remove the cap nut and assemble a noz-
zle to a nozzle tester.
•
With the adjusting screw loosened, oper-
ate the nozzle 2 ~ 3 times to bleed it.
•
Operate the nozzle tester lever at the
specified rate.
•
Adjust the injection pressure to the stan-
dard pressure by spring tension shims.
•
After adjusting the injection pressure,
tighten the cap nut to specified torque.
•
Re-check the injection pressure and see if
the spray pattern is normal.
- 139 -
MAINTENANCE OF MAJOR COMPONENTS
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