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TM 5-2420-222-34
3-19. CONTROL CAMS, GEARS, AND BUSHINGS REPLACEMENT (Con’t).
b.
DISASSEMBLY
1.
Using gear and bearing mechanical puller kit, remove control cam spur gear (8) from control cam (9) and woodruff
key (14).
2.
Remove woodruff key (14) from control cam (9).
c.
CLEANING AND INSPECTION
WARNING
Dry cleaning solvent, P-D-680, is toxic and flammable. Always wear protective
goggles and gloves, and use only In a well-ventilated area. Avoid contact with
skin, eyes, and clothes, and DO NOT breathe vapors. DO NOT use near open flame
or excessive heat. The solvent's flash point is 100°F-138°F (38°C-59°C). If you
become dizzy while using cleaning solvent, Immediately get fresh air and medical
help. If solvent contacts eyes, Immediately wash your eyes and get medical aid.
1.
Clean all metal parts with dry cleaning solvent and rags. Dry thoroughly with clean, dry rags.
2.
Inspect control cam and three bushings for cracks, breaks, and abnormal wear.
3.
Using vernier caliper, measure inside diameter of bushings at several locations. Inside diameter must be 1.502-
1.504 in. (38.151-38.202 mm).
4.
Using micrometer caliper, measure outside diameter of three control cam journals at several locations. Outside
diameter must be 1.4995-1.5005 in. (38.0873-38.1127 mm).
5.
Subtract smallest measurement taken in step 4 from largest measurement taken in step 3 to determine bushing-
to-journal clearance. Clearance must be 0.0015-0.0105 in. (0.0381-0.2667 mm).
6.
Inspect thrust plate for cracks, bends, and breaks. Using vernier caliper, measure thickness of thrust plate.
Thickness must be 0.117-0.124 in. (2.972-3.150 mm).
TA701294
3-112
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