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TM 5-4320-306-24
4-4. REPAIR INJECTION PUMP (Continued)
a.
Measure and record height of screw (147) above
tappet (148).
b.
Loosen nut (149), and remove screw (147) and nut
Remove guide pin (150).
c.
Press stud (151) from bushing (152) and tappet (148).
Remove bushing from roller (153)
d.
Inspect screw (147) for thread damage and for worn or
crushed end. Replace if damaged.
e.
Inspect tappet (148) for pressure marks or scoring.
Remove light marks and scoring using crocus cloth.
f.
Inspect stud (151) for grooving Replace if grooved or
bent.
g.
Inspect nut (149), guide pin (150), bushing (152), and
roller (153) for heavy wear. Replace damaged parts
h.
Press bushing (152) into roller (153), and position roller in tappet (148).
i.
Press stud (151) through tappet (148) and into bushing (152) Install guide pin (150), nut (149), and screw (147).
Turn screw to height above tappet body as recorded in step a above.
j.
Install guide pin (150), nut (149), and screw (147). Turn screw to height above tappet body as recorded in step a
above.
k.
Tighten nut (149) to secure screw (147).
3
Inspect camshaft (82) for cracks or
distortion. Inspect threads for damage
Inspect cam lobes for chipping, scoring,
grooving, or cracks. If damaged, replace
camshaft.
4
Inspect bearing cups (80 and 84) and bearing
cones (86 and 89) for flat areas, pitting,
cracks, or chipping. Inspect bearing cones
for cracked races Replace mating bearing
cups and bearing cones as a pair if either is
damaged
4-16
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