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 Tab/e3·9.I. Po11'crT<1kcDrfre Ho11si110 Stud entificC1tion �··� Ref ttinJ No. :o. No Height 'd Stud me and l•n h 3-180.1 20 1-1 61 6-18(-191&1) x 5116-2-1(5:&1x1-2:32 3-180.1 21 2332 2 114-237/&t) x 114-235 ) x l-3116 Tobie 3-9.. Po1cer 7 JkeJD»ic Housing Ri:pair Stamlards Fig. Ref. PoinLof Sizes and lits Wear ComponenL No. teller measurl)ment of new parts limits Spur gtmr nnd fuel pump 3·180. l n Outside diameter of shaft on spur gear 0.8090 0.8100 0.8085 thfre bent genrshnfL adapter 3-180.1 b Inside diameter of bore in fuel pump dr ive bevel 0.8120 0.8130 0.81- 15 gearshaft adapter 3-180.1 a·b Fil of gear in ndapter 0.00201, 0.00-IOL 0.0050L 3-180.1 a - b End play after assembly 0.0020 0.0050 0.0070 Be,·cl gcnrshnft and fuel 3-180.J c Outside diameter of shaft on bevel gears haft 0.7·165 0.7'175 0.7460 pum bevel gearshaft 3-180.1 d Inside diameter of bore in fuel pump be,•el gear· 0.7495 0.7505 0.7510 +dapter shaft adapter 3·180.1 C·d Fitofgearshafn adapter 0.0020L O.OO·IOL 0.0050L 3-61.5. Assembly (1. Install new encased plain seal (2, fig. 3-180.1) in fuel pump drive housing (1) with lip of seal toward front of housing (bottom of counterbore). Install pipe to tube elbow (16). b. Install spur gear (11) in fuel pump drive bevel gcarshaft adapter (4). Install bevel gearshaft (3) and secure with flat washer (8), hexagon slotted plain nul (9) and new cotter pin (10). Check end play between spur gear (11) and fuel pump drive bevel gearshaft adapter (4). End play must not exceed 0.007 inch after assembly. Install fuel pump drive bevel gearshaft adapter and gears on fuel pump drive housing studs (21) and secure with two flat washers (5), hexagon slotted plain nuts (7) and new cotter pins (8). c. Install new preformed packing (18) in groove on fuel pump bevel gcarshaft adapter (17). Install bevel gcarshaft (19) in fuel pump bevel gearshaft adapter (17) and install the assembly in the fuel pump drive housing (1). Check to be certain the bevel gearshafts (3 and 19) are properly meshed. Section VIII. REPAIR OF PISTONS, RINGS, AND PISTON PINS 3-62. General This section covers the repair of the pistons, rings, and piston pins. Speci fie instructions on disassem· bly, cleaning, inspection, repair and assembly ac· company lhe repair operations. Repair standards of individual components follow the inspection proccdures. 3-63. Disassembly a. Check to see if compression rings and oil control ring are free in piston grooves before re· moval. lark ring grooves of sticking rings for further detailed inspection. Place jaws of re- mover and replacer Part No. 7950177 in the end 1 gap of upper piston ring (fig. 3-181). Spread ring, lift out of groove, and remove from piston. Mark rings for identification showing piston number and g1·oove location. Remove two intermediate compression rings and oil control ring in the same manner. 3·^ Change 1 1 REVER REPLACER OIL COllOL Rll Fig11 re3-18 I. Rr111111·i11g u i11stolling pisto11 cu111prrssion rings 11si119 1·<·11+11>1lt'<Jt11i l'ffl/ucr. b. Remove oil control piston ring expander spring (fig. 3-182), by separating at parting line as shown. 3·64. Cleaning a. Clean pistons (9, fig. 3-183), piston pins (8), and piston rings (10, 11, and 12) by soaking in carbon. ) )