CONTINENTAL AIRCRAFT ENGINE M78-9 service bulletin ...

1 CONTINENTAL AIRCRAFT ENGINE TELEDYNE INDUSTRIES, INC. 1978 TELEDYNE CONTINENTAL MOTORSA ircraft Products DivisionPO Box 90 Mobile Alabama 36601 Member of GAMAG eneral AviationManufacturer s Associationservice bulletin23 August 1978TO: Distributors, Dealers, AIRCRAFT ENGINE Overhaul Facilities, Owners and Operatorsof Teledyne CONTINENTAL Motors AIRCRAFT : CRANKCASE, CRANKSHAFT AND BEARING APPLICATIONSMODELSAFFECTED:All O-470, IO-470, IO-520, TSIO-470 and TSIO-520 Engines Referenced in the years, there have been several changes to the crankcase, crankshaft and bearing combinationsused with various ENGINE models. The following charts have been compiled to assist the customer inidentifying the proper combination for his NOTE:ALTHOUGH THE STUDDING ASSEMBLY PART NUMBER ON THE PHASE 2 STYLECRANKCASES REMAINS, IN MOST INSTANCES, THE SAME AS THE PHASE 1 STYLE, THEACTUAL MACHINING OF THE CRANKCASE IS DIFFERENT.

2 FOR THIS REASON, IT ISIMPERATIVE TO MAKE ABSOLUTELY CERTAIN WHICH CRANKCASE YOU ARE 1 Crankcases were machined for flanged type thrust bearings for O-470 and IO-470 2 Crankcases for above listed models are machined to accommodate four thrust washers at the front addition, the rear main bearing was moved back .060 because of new crankshaft on 0-470 and IO-470engines as listed in service bulletin M74-12. Many of the new crankshafts have narrower rod bearings,smaller lightner holes and thicker cheeks. Because of the narrower crankpin bearings, it is necessary touse different connecting rods and rod 3 Main bearing journals have been narrowed, which required relocation of bearing tangs. Identification canbe made by way of new casting part number CA642360 and :BECAUSE OF THE CHANGE IN THE NEWER CRANKSHAFT, YOU MUST BE CERTAIN THATWHEN INSTALLING THIS CRANKSHAFT IN THE PHASE 1 STYLE CRANKCASE, YOU INSERTTWO PIECES OF service BEARING, PART NO.

3 633334, AT THE REAR MAIN M66-4 FAA-DER Approved23 August 1978M78-9 Page 2 This bearing is for service use only. When installing the new crankshaft in an old Phase 1 stylecrankcase, simply substitute the 633334 bearings for the two rear main bearings different location of the tang in this bearing moves it back enough to allow proper installation of thecrankshaft. After the crankshaft is installed, you must check for clearance between the forward side of therear main bearing boss and the crankshaft cheek. This must be .020 to .030. Provide necessary clearanceby burring if installing either an old style crankshaft in a new style crankcase or a new style crankshaft in Phase2 or 3 new style crankcase, there will be no clearance problem and you simply install the applicable thrustwashers and bearings in new style crankcase and old style bearings per chart when using Phase 1 will also note that on this chart we have listed Phase 1, 2, and 3 new style and old (optional)crankshafts, crankcases, applicable bearings and bearing sets.

4 For information on connecting rods androd bearings, please refer to bulletin August 1978M78-9 Page 3 Front Main BearingsIntermediateMain BearingsRearMain BearingsEngine ModelCrankcaseStudding &MachiningAssemblyCrankshaft &DamperAssemblyForwardRearFull LengthThrustWashers AtFront MainBearingsStandardOptionStandardOption CompleteBearingSetsG642178633256642270(2 )642270(2)637579(4)642720(4)642720(2)642 720A1F, J1, 8642183J11, R14642162J14642191R3, 5, 7, 11, 15, 1620, 23, 25, 37642159R6642164R13, 17, 35642161R32642163S1642194S2642194633225K 1642183K17642162L1, 9, 10642182L16642162M22642192M23, 26642193633219U1, 3642194O-470 Phase 3U2, 4642195641905633136(2)637579(4)642720(4) 642720(2)633136A3G6412136267626322565303 86(2)630464(2)637579(4)630464(4)537848(4 )630464(2)537848(2)630464A5F539734F, J1, 8641186539500J11, R14641215628239J14641271R3, 5, 7, 11, 15, 1620, 23, 25, 37641212632309R6641435640540R13, 17, 35641185R32641187635635S1641398S26413736 33225633136(2)637579(4)530386(4)530386(2 )633136A1B539501O-470 Phase 2N629548633227633136(2)637579(4)630464(4 )537848(4)630464(2)537848(2)633136A223 August 1978M78-9 Page 4 Front Main BearingsIntermediateMain BearingsRearMain BearingsEngine ModelCrankcaseStudding &MachiningAssemblyCrankshaft &DamperAssemblyForwardRearFull LengthThrustWashers AtFront MainBearingsStandardOptionStandardOption CompleteBearingSetsP64121362676263325853 0386(2)630464(2)637579(4)630464(4)537848 (4)630464(2)537848(2)630464A5K1641186539 500K17, L16641215628239L1, 9, 10641226625193633136(2)637579(4)530386(4 )530386(2)633136A1M22641225636433M23, 26641270625168633129633136(2)637579(4)63 0464(4)537848(4)630464(2)537848(2)633136 A2O-470 Phase 2 (cont.)

5 U1, 3U2, 4641398641373641905633136(2)637579(4)530 386(4)530386(2)633136A1A537498C537498E53 9734F539500J539500R632309537920537401(2) 530386(4)530386(2)37401A1B539501N6295485 39576538879(2)630464(4)537848(4)630464(2 )537848(2)538879A1G626762627576530386(2) 627795(2)626740(1)626741(1)630464(4)5378 48(4)630464(2)538897(2)627795A1K539500L6 25193537401(2)530386(4)530386(2)537401A1 M625168539665538879(2)630464(4)537848(4) 630464(2)537848(2)538879A1O-470 Phase 1P626762627587530386(2)627795(2)626740(1 )626741(1)630464(4)537848(4)630464(2)538 897(2)627795A123 August 1978M78-9 Page 5 Front Main BearingsIntermediateMain BearingsRearMain BearingsEngine ModelCrankcaseStudding &MachiningAssemblyCrankshaft &DamperAssemblyForwardRearFull LengthThrustWashers AtFront MainBearingsStandardOptionStandardOption CompleteBearingSetsD642172D42642196E, S1, 3642167F1642173F3, 4, 5, 19642175F7, 18, 23, 26642174G642178M642166S2, 8642168630927C642178633258J642189K642178 633246L642177L642176630886H642179630977U 642169V1, 2642170IO-470 Phase 3V6, 8, 9, 10642171632195642720(2)642720(2)637579(4 )642720(4)642720(2)642720A1D541193627490 D42641227E, S1, 3641192628137F1641191627856F3, 4, 5, 19641195629398F7, 18, 23, 26641194632545G641213628137537848 (4)IO-470-G Only538897 (4)IO-470-G OnlyM641197628858S2, 8641210636611630927530386(2)630464(2)637 579(4)630464(4)630464(2)630464A5IO-470 Phase 2C641213626762 633258 530386(2) 630464(2) 637579(4) 630464(4)

6 537848(4) 630464(2) 538897(2) 630464A523 August 1978M78-9 Page 6 Front Main BearingsIntermediateMain BearingsRearMain BearingsEngine ModelCrankcaseStudding &MachiningAssemblyCrankshaft &DamperAssemblyForwardRearFull LengthThrustWashers AtFront MainBearingsStandardOptionStandardOption CompleteBearingSetsCompleteBearingSetsJ6 41214628509 633246 530386(2) 630464(2) 637579(4) 630464(4) 537848(4) 630464(2) 538848(2) 630464A5K641213632285 633246 530386(2) 630464(2) 637579(4) 630464(4) 537848(4) 630464(2) 538848(2) 630464A5L641189628500L641188629300630886 N1, 7, 10, 11641273641072633363A1N3641274N126412116 40881630932H641273641072633363A1630977U1 , 3642276V1, 2641190633170IO-470 P Phase 2 (cont.)V6, 8, 9, 10641206635006632195530386(2) 630464(2) 637579(4) 630464(4) 630464(2) 630464A5D627490E628137F627586G6281375378 48(4)538897(2)M628858S628137627530C62676 2626784J628509K632285628358537848(4)5388 97(2)L628500628694H627816A2627348R628137 629366537848(4)538897(2)IO-470 Phase 1N627816A2629309530386(2)627795(2)626740 (1)and626741(1)630464(4)630464(2)627795A 123 August 1978M78-9 Page 7 Front Main BearingsIntermediateMain BearingsRearMain BearingsEngine ModelCrankcaseStudding &MachiningAssemblyCrankshaft &DamperAssemblyForwardRearFull LengthThrustWashers AtFront MainBearingsStandardOptionStandardOption CompleteBearingSetsB642155B2, 3642190C642157628995 TSIO-470 PHASE 2D642157632494642720(2)642720(2)637579(4 )642720(4)642720(2)642720A1B641207629254 B2, 3641208629288C641209631977628995IO-70 Phase 1D641209631977632494530862(2)630464(2)63 7579(4)

7 630464(4)630464(2)630464A5A, D, F2, 3, 4, 57, 9, J, L631716IO-520 Phase 3D10, 15, F6, KE642186642158631716642720(2)642720(2)63 7579(4)642720(4)642720(2)642720A1A, D, F2, 3, 4, 57, 9, J, L641200631596D10, 15, F6, K641199634685E641201635133631716630464(2 )630464(2)637579(4)630464(4)630464(2)630 464A1B, BA642088641315640471630969BA126420896415 01639243C2, 3, 6642090641316640472631096IO-520 Phase 2C5, 7642091641318640474638101633620635439(2) 635439(2)637579(4)630464(4)635439(2)6354 39A223 August 1978M78-9 Page 8 Front Main BearingsIntermediateMain BearingsRearMain BearingsEngine ModelCrankcaseStudding &MachiningAssemblyCrankshaft &DamperAssemblyForwardRearFull LengthThrustWashers AtFront MainBearingsStandardOptionStandardOption CompleteBearingSetsIO-520 Phase 2(cont.)M642092641202641048633620635439( 2)635439(2)637579(4)635439(4)635439(2)63 5439A2A, C, G, H642165 TSIO-520 Phase 3M, P, R642185631716642720(2)642720(2)637579(4) 642720(4)642720(2)642720A1A, C, G, H641198632775M, P, R642035631716630464(2)630464(2)637579(4) 630464(4)630464(2)630464A1B, E, J, K, N642094641317640473632778635439(2)635439 (2)637579(4)635439(4)635439(2)635439A2D6 42093641314640470633249635439(2)635439(2 )637579(4)635439(2)635439(2)635439A1 TSIO-520 Phase 2L642096641326640739633620635439(2)63543 9(2)637579(4)635439(4)635439(2)635439A2