TM 5-4310-379-14
(m)
Install needle valve (16) in spray tip (17) and install spray tip (17) on spring cage (15). Ensure
needle valve (16) seats in hole in spring cage (15).
(n)
Lubricate threads in injector nut (18) and carefully thread the injector nut (18) on the injector body (5)
by hand. Rotate spray tip (17) while threading the injector nut (18) on the injector body(5).
(o)
Torque injector nut (18) to 75-85 Ib-ft (102-115 Nm).
(p)
Inspect area between injector nut (18) and injector body (5). If seal ring (8) is still visible, try another
injector nut.
(q)
Install follower (19) on plunger (20).
(r)
Push rack (4) all the way in.
(s)
Install follower spring (21) on injector body (5).
(t)
Install stop pin (22) in injector body so that follower spring (21) rests on narrow flange of stop pin
(22).
(u)
Aline slot in follower (19) with the stop pin (22).
(v)
Aline the flat side of the plunger (20) with the slot in follower (19).
(w)
Install plunger (20) in injector body (5) and press down on follower (19) and press in on stop pin (22).
When in place, the spring (21) will hold stop pin (22) in place.
(x)
Using concentricity gage, check concentricity of spray tip (17). The total run out must not exceed
.008 in. (.020 cm). If concentricity exceeds tolerance, loosen injector nut (18) and center spray tip
(17) and retorque injector nut (18). If after several attempts the spray tip cannot be positioned
satisfactorily, replace injector nut (18).
(y)
Retest reconditioned fuel injector. See para. a. above.
FOLLOW-ON MAINTENANCE
Install fuel injector (para. 4-10)
5-27
