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 TM 55-1905-220-14-10
5-9. FUEL INJECTOR-MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
OVERHAUL-INSPECTION
3. Injector
a. Inspect the teeth on the control
rack gear for excessive wear or
damage. Also check for excessive
wear in the bore of the gear and
inspect the gear retainer. Replace
damaged or worn parts.
b. Inspect the injector follower and
pin for wear.
c. Inspect both ends of the spill
deflector for sharp edges or burrs
which could create burrs on the
injector body or injector nut and
cause particles of metal to be
introduced into the spray tip and
valve parts. Remove burrs with a
500 grit stone.
d. Inspect the follower spring for
visual defects. Then check the
spring with spring tester and an
accurate torque wrench.
e. The injector follower spring (.142"
diameter wire) has a free length of
approximately 1.504" and should be
replaced when a load of less than
70 lbs. will compress it to 1.028".
f.
It is recommended that at the time
of overhaul, all injectors in an
engine be converted to spring
(.142" diameter wire) which will
provide improved cam roller to
shaft follow. However, in the
event that one or two injectors are
changed, the remaining injectors
need not be reworked to incorporate
the current spring.
5-272
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