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 424 of 779

(b) Mechanical clutch assembly.

Refe r

to figures 6-148, 6-144, 6-138, 6-136, 6-135, 6-

133, and 6-131 through 6-129.

Note.

When positioning balls in fan drive

hub, place a dab of grease, (GAA) FSN 9150-

190-0905, on each ball pocket to facilitat e

keeping balls in proper location during assembly.

(2)

Front fan drive housing.

Refer t o

figures 6-127, 6-150 through 6-152, 6-124, 6-

153, 6-122 through 6-119, and (a) and (b),

below.

Note.

Before assembly of the front fan drive

housing it will be necessary to determine the

shim thickness required to control the end play

of fan driven gearshaft and tbe backlash of fan

drive bevel gearshaft.

(a)

Determine end play for fan driv e

gears haft.

Position original shims (fig. 6-126)

on end of inner bearing race (side opposite

bearing trade mark) of lower driven gearshaft

ball bearing.

Measure the total thickness o f

bearing race and shim, from shim on inner race

to supper face of outer race, with end play

removed. Thickness should be from 1.2635-inch

minimum to 1.2655-inch maximum. When total

thickness is greater than

1.2655-inch, strip

0.002-inch thick laminations from the shim pack

until the correct thickness is obtained. When

total thickness is less than 1.2635-inch, add

0.002-inch thick shims (stripped from a new

shim pack FSN 2930-678-3271) as necessary.

Figur e

6-150 illustrates shim location and

measuring points.

Figure 6-150. Determining shim thickness for front fan drive

gearshaft and drive bevel gearshaft.

6-13 0