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 1205 of 1563

TM 9-2815-220-24

PISTONS, RINGS, AND ASSOCIATED PARTS REPLACE/REPAIR

0142 00

WP 0142 00-7

Inside Width

A

B

C

INSPECTION (Continued)

NOTE

Piston ring locations are

numbered from the top down.

5. Check the second (A), third (B), and

fourth (C) ring grooves against limits

specified below.

a. Replace pistons that do not meet the

following limits.

Location

Sizes and Fits of New Parts

inches (mm)

Wear Limits

A

(Inside groove width)

0.0990 (2.5146)

0.1000 (2.54)

0.1035 (2.6289)

B

(Inside groove width)

0.0980 (2.4892)

0.0990 (2.5146)

0.1025 (2.6035)

C

(Inside groove width)

0.1880 (4.7752)

0.1890 (4.8006)

1.1910 (30.2514)

4

6. Measure piston (4) skirt.

a. Measure the piston diameter at the

bottom of the skirt 90 degrees to piston

pin (D).

b. Replace pistons that do not meet the

following limits.

D

Location and Size

Sizes and Fits of New Parts

inches (mm)

Wear Limits

D

(Standard)

D

(0.0100-inch oversize)

D

(0.0200-inch oversize)

D

(0.0300-inch oversize)

D

(0.0400-inch oversize)

5.7410 (145.8214)

5.7510 (146.0754)

5.7610 (146.3294)

5.7710 (146.5834)

5.7810 (146.8374)

5.7420 (145.8468)

5.7520 (146.1008)

5.7620 (146.3548)

5.7720 (146.6088)

5.7820 (146.8628)

5.7380 (145.7452)

5.7480 (145.9992)

5.7580 (146.2532)

5.7680 (146.5072)

5.7780 (146.7612)