TM 5-3810-300-24&P-3
2.0 Shop Notes
REPLACING INJECTOR FOLLOWER SPRING
When replacing the injector follower spring (.120"
diameter wire) in a low clamp body injector built prior to
June, 1965 with a new injector follower spring (.142"
diameter wire), it will be necessary to relocate the timing
pin holes as illustrated in Fig. 5, or grind .022" from the
side of the injector timing gage shank, to permit
continued use of the injector timing gage.
Fig. 5 - Relocating Timing Pin Hole in Injector Body
REFINISHING INJECTOR FOLLOWER FACE
When refinishing the face of an injector follower, it is
extremely important that the distance between the
follower face and the plunger slot is not less than 1.645 "
minimum as shown in Fig. 6. If this distance is less than
specified, the height of the injector follower in relation to
the injector body will be altered and proper injector timing
cannot be realized.
NOTE: The maximum amount of metal that can
be removed from the injector follower face, and
still ensure a sufficiently hardened surface for
contact with the rocker arm, is .010 ".
Fig. 6-Injector Follower
The appearance of the injector body and nut of a rebuilt
materials:
injector can be enhanced with an oxide finish obtained
through a dipping process known as bluing. Pre-mixed
6 lbs. of sodium hydroxide per gallon of water, 3-1/2 lbs.
compounds are available commercially for preparing the
of sodium nitrite per gallon of water I ounce of
necessary solutions. Detailed instructions are usually
phosphoric acid per gallon of water.
provided with the commercial compounds. An effective
bluing solution can be prepared in the service shop by
The procedure usually follows five (5) steps in sequence:
mixing the following
Page 230
