TM-9-2815-200-35

ENGINE, WITH CONTAINER:TURBOSUPERCHARGED, DIESEL ,FUEL INJECTION ,90-DEGREE “V” TYPE, AIR - COOLED ,12 - CYLINDER , ASSEMBLY ;MODELS AVDS-1790-2M (2815-856-4996), AVDS-1790-2A AND AVDS-1790-2AM (2815-856-9005)

TECHNICAL MANUAL; DIRECT SUPPORT, GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS

TM-9-2815-200-35 - Page 446 of 779

(6)

Advance vane housing cover and ac-

cessory drive gearshaft.

Refer to figure 6-186.

(a) Cut four pins 7 / 16-inch (approx.)

long from 7 / 32-inch diameter brass brazing rod

or other soft material. Insert the pins in the four

equally spaced holes in bearing portion of ad-

vance vane cover. An improvised ring com-

pressing tool of the type shown in figure 2-1 can

be fabricated to facilitate removal, of the advance

vane cover internal retaining ring. If the im-

provised tool is used, install it over the pins and

tighten bolts sufficiently to compress the advance

vane cover internal retaining ring.

(b) Install accessory drive gearshaft in a

soft-jawed vise and remov e

advance

van e

housing cover (A) using a gear puller as shown in

figure 6-186.

(c) Compress retaining ring and remove

plug (B) from accessory drive gearshaft.

Caution;

Use extreme care in this operation to

prevent damage to vane cover or gearshaft.

b. Cleaning.

Refer to paragraph 6-2.

c. Inspection and Repair.

Refer to paragraphs

6-3 and 6-4, and (1) through (7), below.

(1)

Fan drive gearshaft and fan drive bevel

gearshaft.

Inspect fan driven gearshaft (50.1,

fig. B-26) and fan drive bevel gearshaft (5C2,

fig. B-26) to limits specified in overhaul stan-

dards (table 6-30).

(2)

Oil seal.

Replace the oil seal each

overhaul.

(3)

Clutch assembly.

Refer to paragraph 6-

40c and tables 6-26 or 6-27.

(4)

Advance unit seals and springs.

Inspec t

seals and springs for cracks, indentations, and

wear. Check seals to the limits specified in

overhaul standards (table 6-31).

(5)

Flyweight springs.

Inspect flywhee l

springs for cracks and damage. Check spring

tension to limits specified in overhaul standards

(table 6-31).

(6)

Studs.

Refer to paragraph 6-4e, table 6-

32, and figure 6-187 when replacing studs.

6-152