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 428 of 596

TM 9-2815-205-34

3-64. CYLINDER HEAD ASSEMBLY REPAIR (Cont)

d. Inspection/Repair

(1) Cylinder head

(a) Check fire deck surface of cylinder head for flatness. Using a straight edge and thickness

gages, check lengthwise (six places) and crosswise (four places) for warpage. Maximum

lengthwise warpage is 0.005 inch (0.125 mm) and maximum crosswise warpage is 0.004

inch (0.102 mm).

(b) Inspect cam follower bores in cylinder head for scoring and wear. Clean light score marks

with crocus cloth wet with fuel oil. Nonprotruding longitudinal scoring of 0.003 inch (0.08

mm) deep and bore surface finish of 120 μ inch AA maximum is permissible. Check

follower bore clearance with plug gage for diameter of 1.0626-1.0670 inches

(26.990-27.102 mm). Replace head if worn beyond 1.0670 inches (27.102 mm).

(2) Water nozzles

Check four water hole nozzles for looseness. If necessary, replace nozzle as follows:

(a) Clean nozzle bore in cylinder head with 5/8 inch drill. Flare edge of hole slightly.

(b) Remove any loose nozzle (64) from cylinder head.

(c) Place nozzle (64) in bore with nozzle opening positioned as shown.

(d) Press nozzle flush to 0.0312 inch (0.792 mm) below surface of cylinder head.

(e) Nozzle must fit tight. If necessary, expand nozzle with wood dowel or other suitable tool to

make a tight fit.

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