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 352 of 1563

TM 9-2815-220-24

COOLING FAN INSPECTION

0053 00

INSPECTION (Continued)

2. Visually inspect cooling fans.

Use a magnifying glass (item 73, WP 0176) and a strong light.

a. Look for cracks, nicks, and scratches.

(1)

Any crack (especially in the area of a bolt hole) is sufficient cause for replacement of a

fan.

(2)

Nicks and scratches require a judgement call:

small scratches (1/32-inch deep by 1/16-

inch long) and nicks (1/32-inch deep by 1/4-inch long) are acceptable while large ones are

not.

The following pictures are examples of acceptable and unacceptable nicks.

The

dimes in the pictures are for size referencing.

If in doubt replace the fan.

Acceptable Nick

Unacceptable Nick

b. Replace a cooling fan that has bent, broken or warped blades.

c.

Replace a fan if bolt holes are elongated or show evidence of wear.

END OF WORK PACKAGE

WP 0053 00-2