Fuel injector filter, removal and installation.

TM 10-3930-242-34

Figure 3-23. Injection rack, gear, spray tip, and valve as-

Figure 3-24. Fuel injector filter, removal and installation.

sembly components, removal and installation.

spring seat, spring cage, needle valve, and tip

the injector from operating properly, Check for

assembly on top of the body, Carefully place the

burs, nicks, erosion, cracks, chipping, and exces-

i n j e c t o r nut over the spray tip and valve parts,

s i v e wear. Inspect the spray tip for enlarged

and thread it on to the body. Tighten the injec-

orifices,

tor nut to 75-85 ft.-lb. torque. Remove the body

f. Needle Valve Test. With the injector nut and

w i t h the injector parts from bench vise and in-

spray tip cleaned, clamp the nonthreaded end of

s t a l l in the injector tester. Operate the pump

the body J21012-1 in a bench vise. Then, assem-

u n t i l the spray tip valve has opened several

b l e the check valve, check valve cage, spring,

times to purge air from the system. Operate the