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 534 of 779

Figure 7-30

c. Install Rocker Arm Covers.

The camshaf t

lobes (cams) for cylinder No. 1R must be down

towards crankshaft, so valve rocker arm roller s

are on base circle of camshaft as shown in figures

7-27 and 7-28 before installing rocker arm cover.

The identification number stamped on rocke r

arm cover must match the number stamped o n

cylinder assembly (fig. 5-105). Rocker ar m

covers must always be installed on their mating

cylinder assemblies .

Note.

For instructional purposes. installation

of rocker arm cover for cylinder No. 1R is used.

Remaining covers are installed in the sam e

manner .

(1) Remove protective cover from fue l

injector nozzle and holder opening in cylinde r

assembly. Apply a light film of sealing com -

pound (MIL-C-10523 Ord.) to valve rocker ar m

cover and install cover. Refer to figure 5-109 and

torque tighten four bolts to 275 to 325 pound -

inches. Refer to figure 5-108 and torque tighten

all bolts and cap screws to 100 pound-inches .

(2) Set valve clearance of No. 1R intak e

valve to 0.010-inch using thickness gage blade -

5210-793-7898 as shown in figure 7-22 .

(3) Set valve clearance of No. 1R exhaus t

valve to 0.025-inch using thickness gage blade -

5210-793-7899 as shown in figure 7-23 .

(4) Rotate crankshaft as necessary t o

position camshaft lobes (cams) in downwar d

position (figs .

7-27 and 7-28) as each of th e

remaining valve rocker arm covers are installed .

7-22