TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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Figure 3·188. J{emoving or 111scolli11s �lve sprins1, +11111 retai11ers, a"d tA'houJt value rotor. b. Valve Rocker Arm Covers. Remove two plugs (13, fig. 3-190), and remove valve rker shaft� (14 and 31) from valve rker cover (15). Shaft has a 1/4·< UNC puller screw tapped opening. Remove exhaust TM 9-2815-220-34 valve rker arm (=) and intake valve rker arm (>). Remove valve rker adjusting screw nuts (<) and remove valve rker adjusting screws (). NOTE Do not remove intake valve rker arm bearing sleeves (32) and exhaust valve rker arm bearing sleeves (!) unless in- spection 8-7ld indicates bearing sleeves must be replaced. 3-70. Cleaning a. Clean cylinder and assiated parts and remove heavy carbon deposits from combustion chamber with a scraper or blunt tool which will not nick or scratch the surface. Remove only the heavy c�rbon deposits. Surface need not be cleaned to a mirror finish. b. Clean carbon from fuel injector nozzle seat using nozzle carbon cutter Part No. 10X2949 as shown in fiunm R. lA Figure 3-189. Clt>+11i11g carbon c/('JIOsirs /mm fuel i11jec1or 111uile sClll +sing 11o:tle carbon culler. c. Soak cylinder in carbon removing compound to remove carbon and other foreign material from dome and valve port�. 3.97