TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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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