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 gure 3·221. Remo+itig or ir1J1allin fa11 dri111• l'Crtiral dria:e shaft, balls, a+tl 1pri11gs from fa11 drfrc huh. (3) Support outer ball bearing (fig. 3-222) and press drive hub (9, fig. 3-220) from ball bearing. gurP 3·222. /(e11101,it1 or i1Utal/ing /,al/ benri11g from r/rfre loub. (4) Separate n drive clutch n:gc (I) om I dsc housing (2). NOTE Do not remove the dowel pins (13, fig. 3- 60) and retaining rings (14) from disc housing unless inspection (para 3-9) in- dicates replacement is necessary. Use a suitable arbor press to remove dowel pins from housing. 3-92. Cleaning Ref er to paragraph 3-36. 3-93. Inspection and Repair a. Ge11eral. Refer to paragraph 3-37 and 3·&. b. Fan Drive11 Gearslwft and Fan Driven Bevel Gearsliaft. Inspect fan driven gearshaft (21, fig. 3- 216) and fan driven bevel gearshaft (15) to limits specified in repair standards (table 3-21). NOTE If either the fan driven gearshaft or fan drive bevel gearshaft require replacement, both must be replaced as they are a match- ed gear set·and cannot be replaced in- dividually. c. Oil Seals. �efer to paragraphs 3.37 and 3-&. d. Ball Hearing&. Refer to para�aphs 3�37 and 3-&. e. Howing Assemblies. Inspect fan drive clutch disc housing (2, fig. 3·60) cꝏling fan drive housing (2, fig. 3-216), and fan drive housing base ( for le dowel pins and oil transfer tubes if applicable. f ClwcJr Compression Springs and Balls. Inspect clutch compression springs (12, fig. 3-Ü) for weakness, broken coils, and distorted condition. Check balls (8) and springs to limits specified in repair standards (table 3-4). g. Drivl! Hub. Inspect fan drive hub (9) for raised metal, lꝏse rivets, warpage or pitted surfaces caused by ball wear. Check bearing surfaces against limits specified in repair standards (tables 3·21). Repair metal surfaces by polishing pitted areas smꝏth. Ii. Clch Discs. Inspect clutch discs (3, 4, 5 and 6, fig. 3-60) for cracks, warpage, wear or other abrasive damage. Inspect for excessive heat distortion. Clutch discs cannot be repaired. Replace discs if any of the above mentioned is evident. Tobie 3·20. Cooling Fan Clutch Repair Standa 1g. Rd. roinl ol 5, .., and rou W•r Co1nnen1 o. l etter meu un menl of ntw part l i mii oling fan clu�ch 3.Ü g Outside diameter of fan drive 1.142 1.14< 1.1440 vertical shaft. 3.Ü c Inside diameter of fan clutch 1.1470 1.14P 1.14Z huh. 3-Ü g Fil of shaft in hub aring. O.ꝃIOL 0.>L 0.2L 3·Ü a Spherical diameter of clutch 0.6240 0.6Ą • balls. r1 at tnd t.lt 3·128 Change 3 ) ) )