Fuel System (Rev 1/97)
99
Repair
1. Place the nozzle body in a vise that has aluminum jaws
or jaw covers.
2. Loosen and remove the nozzle nut.
Injection Nozzle Assembly
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3. Remove the nozzle valve and seat set from the nozzle
nut and submerge them in diesel fuel. Make sure to
keep them together as a set.
4. Remove the nozzle body from the vise.
5. Remove the spacer, spring seat, spring, and adjustment
shim from the nozzle holder.
6. Inspect the spacer. Replace the spacer if any wear or
damage is evident.
7. Inspect the spring. Replace the spring if it is bent,
scratched, or rusted.
8. Use a nozzle cleaning tool kit to clean the nozzle valve
and seat set.
a. Clean the carbon off the outside of the nozzle seat
with a brass brush.
b. Clean the inside of the nozzle with the cleaning
tools and solvent.
c. Thoroughly rinse the nozzle seat and valve with
cleaning spray and submerge them separately in
diesel fuel.
9. Test the nozzle valve and seat set.
a. Place the nozzle valve in the nozzle seat while
holding the nozzle seat in a vertical position.
b. Pull the nozzle valve about half way out of the
nozzle seat.
Testing Nozzle Valve and Seat Set
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