TM 5-4310-379-14
5-11. Fuel Injectors (Cont).
(i)
Turn injector body (20) upside down and remove gear retainer (21) and gear (22).
(j)
Remove control rack (23).
WARNING
Dry cleaning solvent PD-680 used to clean parts is potentially dangerous to personnel and
property. Avoid repeated and prolonged skin contact. Do not use near open flame or excessive
heat. Flash point of solvent is 100-138°F (38-60°C).
(k)
Clean all items, except seal, in dry cleaning solvent and dry thoroughly.
(I)
Ensure all passages, drilled holes, end slots in injector parts are cleaned.
NOTE
Care must be used when cleaning spray tip. Do not damage any internal surfaces. Do not buff
external surfaces excessively. Do not use a steel wire wheel or spray tip may be distorted.
(m)
Inspect spray tip (10). Use spray tip tool, wire brush, and pin vise and clean spray tip (10).
(n)
Use fuel hole cleaning tool and rack hole cleaning brush and clean injector body (20).
(o)
Using reamer, clean up both sides of ring surface in injector body (20).
(p)
Use a .375 in. reamer and clean up ring bore in injector body (20).
(q)
Using injector nut and spray tip seating tools and clean up spray tip seating surface in injector nut (8).
CAUTION
Do not touch the finished plunger surfaces with your fingers.
(r)
Ensure the high pressure bleed hole in the side of the bushing (19) is not plugged. If the hole is
plugged, fuel will leak out of injector and cause serious dilution problem.
NOTE
Keep bushing and plunger together, they are mated parts.
(s)
Inspect the teeth on gear (22) and rack (23) for excessive wear, missing teeth, or other damage.
Inspect the bore of the gear (22) for excessive wear. Replace a worn or otherwise damaged gear
(22) or rack (23).
(t)
Inspect gear retainer (21) and replace if excessively worn or otherwise damaged.
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