TM-9-2815-205-34

ENGINE WITH CONTAINER; MODELS 5063-5299, 5063-5392, 5063-5393, 5063-5395, 5063-5398, 5063-539F, 5063-539L

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

AUGUST 1992

TM-9-2815-205-34 - Page 429 of 596

TM 9-2815-205-34

(3)

Exhaust valve guides

Inspect valve guides (65) for fractures, chipping, scoring, or excessive wear. Measure inside

diameter of valve guide and diameter of valve stem to determine clearance between guide and

valve stem. If clearance exceeds 0.005 inch (0.125 mm), replace valve guide. Replace valve

guide as follows:

(a)

(b)

(c)

(d)

Support cylinder head, bottom side up, on three inch thick wood blocks.

Using valve guide remover (66), drive valve guide (65) out of cylinder head.

Place cylinder head right side up in press.

Place valve guide 65) squarely in bore. Using valve guide installer (67), press guide until

tool contacts cylinder head.

(4) Valve seats

Inspect valve seats (68) for excessive wear, pitting, cracking, or improper seat angle. Replace

as follows:

(a) Place cylinder head on wood blocks with fire deck side up.

(b) Using valve seat tool kit (69), remove valve seat (68).

(c) Clean valve seat counterbore in cylinder head and inspect for concentricity, flatness, and

cracks.

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