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 530 of 779

Note.

The valve timing procedure must b e

followed in detail to prevent the valves fro m

striking the head of the piston .

1.

2.

3.

4.

5.

Rotate the right camshaft (A) until the two lobes (cams)

for intake and exhaust valves for No. 6R cylinder are

pointed towards the crankshaft. Remove cover from

fuel injector nozzle holder assembly opening in cylinder.

Apply a light film of sealing compound (MIL-C-10523

Ord.) on valve rocker arm cover and position cover (B)

on cylinder. Identifying numbers on cover and cylinder

must correspond (fig. 5-105). Valve rocker arm rollers

must contact base circle of camshaft and lip of

preformed intercylinder hoses must not be folded under

cover. Tap cover gently to position cover over dowel

pins.

Refer to figure 5-109 and torque tighten four bolts (C) to

275 to J25 pound-inches. Refer to figure 5-108 and

torque tighten all bolts and cap screws to 100 pound-

inches.

Refer to figure 5-107 and secure camshaft gear housing

to valve rocker arm cover and cylinder with bolts (D).

Using

thickness

gage

blade-5210-793-7897

(E)

set

intake valve clearance to 0.100-inch by turning the

adjusting screw clockwise to decrease the clearance or

counterclockwise to increase the clearance.

Note.

Check position of valve adjusting screw

pad. Pad must seat flat on valve stem .

Figure 7-22. Installing valve rocker arm

cover and adjusting intake valve

clearance (cylinder No. 6R) .

Note .

The exhaust valve clearance i s

decreased by turning the adjusting screw clock -

wise or increased by turning the screw coun -

terclockwise .

Torque tighten adjusting scre w

lock nut to 175 pound-inches after adjustment .

Figure 7-23. Adjusting exhaust valv e

clearance .

7-18