TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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b. Positioning Camshaft. Turn engine using splined wrench - 5120-793-7895 until valve rocker arm roller is on base circle of camshaft as shown in figure 4-73. Set number 6R and 6L intake valve clearance to 0.100 inch (fig. 4- 197). c. Checking Valve Timing. Turn flywheel counterclockwise, viewed from rear, until pad on valve adjusting screw is just free of the valve stem (intake valve has just closed) (fig. 4-195). In this position the fly-wheel mark “6R INT CLOSE 0.100 CLR” should be alined with pointer (fig. 4-196). If flywheel marks are not alined with pointer within ¼ inch at the time the adjusting screw pad becomes free of valve stem it will be necessary to remove camshaft drive shaft and reset valve timing. Valve timing may be reset following the instructions that accompany figures 4-198 through 4-201. 1. Loosen timing adjusting screw lock nut (A). 2. Turn valve adjusting screw (B) and set valve clearance to 0.100 inch. 3. Gage (C) must move through clearance with a slight drag. Tighten lock nut after setting clearance. Check clearance to make certain setting has not changed. Figure 4-197. Setting intake valve clearance for cylinder 6R using thickness gage blade-5120-793-7897. Figure 4-196. Flywheel timing marks a lined with pointer for valve timing-right bank of cylinders. 4-101