CAMSHAFT, CAMSHAFT GEAR, AND CAMSHAFT BUSHING REPLACEMENT - continued

TM 10-3930-673-34

(c)

Measure valve lobe diameters at peak of lobe. Minimum allowable intake valve lobe diameter

at peak of lobe is 1.852 in. (47.04 mm). Minimum allowable exhaust valve lobe diameter at

peak of lobe is 1.841 in. (46.77 mm).

(d)

Measure fuel lift lobe diameter. Minimum allowable fuel pump lobe diameter is 1.398 in.

(35.5 mm).

(3)

Inspect camshaft gear (1).

(a)

Discard camshaft gear if measured backlash (Removal, Step (1)(a)) is not 0.003 - 0.013 in.

(0.08 - 0.33 mm).

(b)

Inspect gear teeth for damage or excessive wear.

(c)

Check for cracks at roots of gear teeth.

(4)

Inspect thrust plate (5).

(a)

Examine thrust plate (5) for damage distortion or excessive wear.

(b)

Discard thrust plate (5) if measured camshaft endplay (Removal, Step (1)(c)) is not 0.007 -

0.011 in. (0.17- 0.29 mm). Also check for enlarged thrust plate (5) slot in camshaft if endplay is

excessive.

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