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 331 of 596

TM 9-2815-205-34

d. Inspection

(1) Dome and Skirt

NOTE

Overheating or burned spots on piston skirt or dome may Indicate an obstruction in

connecting rod oil passage.

(a)

(b)

Examine piston skirt and dome for score marks, cracks, damaged ring groove lands, or

indications of overheating. Using a crocus cloth, remove light score marks. Replace piston

skirt or dome severely scored or overheated.

Check cylinder liner and block bore for excessive out of round, taper, or high spots which

could cause failure of piston (see Para 3-52).

(2) Piston Pin

CAUTION

Do not polish or refinish piston pin. Hand polishing or refinishing will destroy precision

finish and result in rapid bushing wear.

(a) Inspect piston pin (18) for signs of fretting.

(b) New piston pin has diameter of 1.3746 to 1.3750 inches. Replace piston pin if worn to

diameter of 1.3730 inches or less.

3-201