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 251 of 779

Figure 5-110.

Figure 5-110.

Note.

Before removing rocker arm cover bolts

(B) the tension on valve rocker arm, caused by

valve springs, must be released. Turn engine (fig.

5-91) until valve rocker arm rollers are on

camshaft base circle or until both valves are

closed to relieve tension before removing any

cover.

Remove

1. Check both cylinder No. 1 R valve rocker arms by

moving arms (A) up and down. If clearance cannot be

felt, turn engine until clearance is evident. When

clearance is felt between botb adjusting screw pads and

valve stems, the rocker arm rollers are on the camshaft

base circle, and valves are completely closed.

2. Remove remaining four bolts (B) and four packings

with retainers. Remove rocker arm covers as shown in

figure 5-110. Remove remaining 11 covers in tbe same

manner.

Install

1. Install four new packings with retainers on four bolts

(B).

2. Install four bolts (B) securing rocker arm covers.

Figure

5-109.

Checking valve clearance

before removing valve rocker arm covers

and removing or installing remaining

cover bolts.

Remove

1. Remove

washers.

2. Remove

Install

1. Position

six drilled hex-head bolts (A) and flat

right camshaft gear housing cover (B).

right camshaft gear housing cover (B) on

camshaft g-ear housing.

2. Install six drilled hex-head bolts (A) and flat washers

securing cover.

Figure 5-111. Removing or installing right

camshaft gear housing cover.

5-65