TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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) semblies should be installed in the same manner. NOTE Wash cylindel' bores thoroughly just prior to engine assembly, using a power brush with hot (160°F.) soapy water. Cylinder bores should then be oiled to prevent rust. c. Rotate engine overhaul stand until right bank cylinder holes, with connecting rod protectors, are positioned to received cylinder Nos. lR through 6R. d. Install piston and rings (fig. 3-318) in cylinder assembly using compressor and gage 10882888. The piston posilion number (fig. 3-317) must al- ways conespond to the cylinder number marked on intake valve side of valve rocker arm cover flange. The arrow on the piston boss must be di- rected toward the exhaust port outlet. Guide pis- ton and rings into cylinder until all piston rings TA0219H Figure 3-18. Installing piston in cylinder assembly using compresso1· and gage. TM 9-2815-220-34 have entered the cylinder bore. Slide the compres- sor from piston and ring assembly. l nstall remain- ing pistons in cylinders in the same manner. e. Install new preformed packing (fig. 3-318) on each cylinder base making sure that packing is not twisted or other wise improperly seated. CAUTION Lubricant must extend across face of washer nut in order to obtain reliable torque. f. Sparingly coat cylinder stud thl'eads (1, fig. 3-319) on crankcase with OE engine oil or GAA grease. I Mounting stucJ 2 Connecting rod 3 Dowel !)in 4 Piston pin 5 Cylinder assembly igrtrs 3- /. I 11lulli119 (·y/ii1<le1· assembly attd piston. I g. Using splined wrench 10882747, rotate engine crankshaft until the No. lR connecting rod (2) is at t.he top of ils slrokc. Remove crankcase protector 10882790 from cylinder No. lR mounting studs (1) being careful nol to allow connecting rod lo force- ably dl'op against the crankcase cylinder mounting sul'face or mounting studs. g.1. rnstall power lake-off drive coupling {l, fig. 2-148.2) on spul' ge;1rshaft and secill'e with flat washer (4) and self-locking nut (3). Install holding bar and puller aemuly on coupling (fig. 2-148.2). RotaLe engine crankshaft until the No. lR connect- ing rod (2, fig. 3-319) is at the top of its stroke. Remove crankcase protector, part number 10882790, from cylinder No. lR mounting studs (1). Do not allow connectingrod to come in contact with the crankcase cyli nder mounti ng surface or mounting studs. h. Remove piston pin from piston ofNo. lR cylin- der assembly and place piston and cylinder over No. lR connecting rod. Insert piston pin(4) through connecting rod and piston and center pin in posi- Change 1 3-227