TM 9-2320-272-24-2
4-19. CAM FOLLOWER HOUSING MAINTENANCE (Contd)
c . Cleaning and Inspection
WARNING
Drycleaning solvent is flammable and toxic. Do not use near open
flame and always have a tire extinguisher nearby when solvents
are used. Use only in well-ventilated places, wear protective
clothing, and dispose of cleaning rags in approved container.
Failure to do this may result in injury or death to personnel and/or
damage to equipment.
Clean cam follower housing (1) with drycleaning solvent and inspect for breaks and cracks. Replace
1.
if broken or cracked.
Clean cam follower shaft (2) with drycleaning solvent and inspect for breaks, cracks, or out-of-round
2.
condition. Replace if broken, cracked, or out-of-round. Replace if cam follower shaft (2) outer
diameter is less than 0.748 in. (19.02 mm).
Measure all bearing surfaces with outside micrometer.
3.
Clean cam follower lever (3) with drycleaning solvent and inspect for breaks and cracks. Replace if
4.
broken or cracked.
Inspect cam follower lever bushing (4) for breaks, cracks, or out-of-round condition. Replace if
5.
broken, cracked, or out-of-round.
Measure inner diameter of cam follower lever bushing (2) with telescoping gauge. Replace if inner
6.
diameter is more than 0.752 in. (19.10 mm).
Coat ball end of new push tube (5) with Prussian blue and place into push tube insert (6). Rotate
7.
ball end of push tube (5) to check push tube insert (6) for wear. Replace push tube insert (6) if wear
area is not 80 percent blued.
Inspect cam follower roller pin (7) for breaks, cracks, or out-of-round condition. Replace if broken,
8.
cracked, or out-of-round.
Measure outside diameter of cam follower roller pin (7) with outside micrometer. Replace if outer
9.
diameter is less than 0.497 in. (12.62 mm).
Inspect exhaust and intake valve cam roller (8) for breaks, cracks, or out-of-round condition.
10.
Replace if broken, cracked, or out-of-round.
Set telescoping gauge to 0.503 in. (12.83 mm) and place into inner diameter of exhaust and intake
11.
valve cam roller (8). Replace if telescoping gauge slides into exhaust and intake valve cam roller (8).
Measure outer diameter of exhaust and intake valve cam rollers (8) with micrometer. Replace
12.
exhaust and intake valve cam rollers (8) if outer diameter is less than 1.248 in. (31.71 mm).
4-148
