TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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TM 9-2815-220-34 I Cnµscrew, Ont washer and lkwasher 2 Cnpscrew, lkwasher and Oat washer :1 Housing ·I CylinJer Fig111·1'-l·66. lh.<c1111111r/111y111•c111111t't0li11iiyli/1·11111.<!111// "'"" lt1111i11y 11/ 1·y/i111l1•1·6R ,.,,,.k, r11r111 1·1wrr. I Machine boll :rnd Oat washer 2 Machine bolt and Oat washer 3 Cacrew and Oat washer Fig11rr .t-61. Re111ori 11g or i11stulli11y rurk 11r111 cot·er bolts fl m/ fll/lSl'l"l'l<"S. remaining four rocker arm cover bolts, t.he tension on valve rC1cker arm, caused by valve springs, must be released. Turn Model AVDS-1790-2C and A VDS-1790-2D engines using splined wrench, Part No. 10882747 (fig. 2-42). Tu Model AVDS-1790- 3·34.2 Change 2 2DR engine using holding bar and puller assembly (fig. 2-148.2). Tu engine until valve rocker arm rollers are on camshaft base circle, or unt. il both valves are closed, to relieve tension before remov· ing the cover. Check both cylinder No. l R valve rocker arms for relief of tension by moving arms (fig. 3-68) up and down. If clearance cannot be felt, turn engine until clerance is evident. When clear- ance is felt between both adjusting screw pads and valve stems, the rocker arm rollers arc on the cam- shaft base circle, and valves are completely closed. Remove remaining ur bolts (fig. �-68) and pack- ings with retainers and remove rocker arm covers as shown in figure 3-69. Remove remaining 11 cov- ers in the same manner. NOTE Cylinders are equipped with replaceable camshaft bearings. The bearing half in the cover should remain with the cover. "· Remove five hex-head bolls and flat washers I (fig. 3-70) and remove right camshaft gear housing cover gasket (fig. 3-71). Remove camshaft drive Kearshafl oil transfer plug retaining l"ing. F'igu re .1.+. hecki 11g vtv clt•u ru 11ce 11 ml 1·e111uvi 11 cover bt1. ) )