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 TM 55-1905-223-24-1
i.
Measure the shaft retaining plate with a micrometer. Replace if not between 0.360 to 0.372 inch (9.14 to
9.45 mm) thick or if it is scored.
CAUTION
If the area of fretting is longer than a 1/8-inch (3 mm) wide longitudinal band, replace the
camshaft. Fretting or damage can cause camshaft failure.
j.
Check the camshaft nose in the gear area for fretting or burrs. Remove fretting or burrs with a fine crocus
cloth. If they cannot be removed, replace the camshaft.
k.
Measure the outside diameter of the camshaft nose in the gear area. Replace the camshaft if the outside
diameter is not between 2.2520 inch (57.201 mm) and 2.2524 inch (57.211 mm).
CAUTION
Do not use the gear if the bore is damaged or has fretting in excess of a 1/8 inch (3 mm) wide
bank. Fretting or damage can result in gear movement causing camshaft failure.
1.
Inspect camshaft gear for cracks, chipped or broken teeth. Inspect the bore for fretting or burrs. Inspect
the keyway for burrs. Remove fretting, burrs, or raised material with a fine crocus cloth. If they cannot be
removed, replace the gear.
m.
Check camshaft gear for cracks using magnaglo tester.
CAUTION
Use the copper braid contact with neoprene covers supplied with the tester to avoid burning the
teeth of the gear. Position the gear so that the keyway points toward one of the characters (FIG.
(1)
Apply bath solution to area being checked.
(2)
Set up magnaglo tester for head shot using instructions provided on tester.
Apply head shot
amperage. Adjust amperage to value specified below:
Gear Outside Diameter
Amperage dc
Less than 4 inch (101 mm)
1000
4 inch to 8 inch (101 mm to 203 mm)
1500
Greater than 8 inch (203 mm)
2000
(3)
Use black light supplied with tester to checkgear for cracks.
CAUTION
Position gear so that keyway points toward the coil (FIG. 4-65b) 4-65
4-65
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