TM-9-2815-220-24

AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines

TM-9-2815-220-24 - Page 1123 of 1563

TM 9-2815-220-24

CYLINDER ASSEMBLY REPAIR

0135 00

INSPECTION (Continued)

6. Inspect valve guides (18, 19).

a. Look for cracks, galling, erosion, or scuffing.

b. If any cracks, galling, erosion, or scuffing is found, replace guides.

7. Check guides against limits specified in the following table.

a. If guides are out of limits, they must be replaced.

1

19

8

Point of Measurement

Size and Fit of New Parts

inches (mm)

Wear Limits

Inside diameter of intake valve

guide

0.4995 (12.6873)

0.5005 (12.7127)

0.5035 (12.7889)

Outside diameter of intake valve

stem

0.4975 (12.6365)

0.4980 (12.6492)

0.4970 (12.6238)

Fit of intake valve stem in guide

0.0015L (0.0381)

0.0030L (0.0762)

0.0065L (0.1651)

Inside diameter of exhaust valve

guide

0.5615 (14.2621)

0.5625 (14.2875)

0.5655 (14.3637)

Outside diameter of exhaust valve

stem

0.5570 (14.1478)

0.5580 (14.1732)

0.5565 (14.1351)

Fit of exhaust valve stem in guide

0.0035L (0.0889)

0.0055L (0.1397)

0.0090L (0.2286)

WP 0135 00-9