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TELEDYNE CONTINENTAL AIRCRAFT ENGINE …

ISSUEDREVISEDPAGENOREVISIONMODAYYEARMODA YYEAR1 of 4081597SB97-11 1997 TELEDYNE INDUSTRIES MOTORSAn Allegheny TELEDYNE Box 90 Mobile Alabama 36601 Ph. 334-438-3411 TELEDYNE CONTINENTAL AIRCRAFT ENGINESERVICE BULLETINC ompliance Will Enhance Safety, Maintenance or Economy ofOperationSUBJECT:INSTALLATION OF SINGLE PIECE ROCKER ASSEMBLY BUSHINGS PART NUMBERS 652129 AND 652963 PURPOSE:To insure correct installation of single piece rocker assembly bushingsCOMPLIANCE:At time of cylinder repair or overhaulMODELSAFFECTED:O-470, except A, E and J; IO-470, except J all IO-520;IO-550; TSIO-470; and TSIO-520, except AE; all TSIO-550, GTSIO-520,GIO-550-A and all TSIOL-550 ENGINE INFORMATIONThis service bulletin provides specific instructionfor installation of single piece rocker armbushings part numbers 652129 and 1 of this bulletin details the installation ofbushing part number 2 of this service bulletin details installation ofbushing part number OF SINGLE PIECE BUSHINGS, P/N652129 AND P/N 652963, IN ROCKER ARMSOTHER THAN SPECIFIED IN THIS SERVICEBULLETIN WILL RESTRICT OR BLOCK OIL FLOW TOTHE ROCKER ARM SHAFT AND VALVE GUIDESRESULTING IN POSSIBLE ENGINE INSTALLATIONPart 1: Bushing P/N 652129 Bushing P/N 652

ISSUED REVISED PAGE NO REVISION MO DAY YEAR MO DAY YEAR 3 of 4 08 15 97 SB97-11 TELEDYNE CONTINENTAL MOTORS An Allegheny Teledyne Company P.O. Box 90 Mobile Alabama 36601 Ph. 334-438-3411

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Transcription of TELEDYNE CONTINENTAL AIRCRAFT ENGINE …

1 ISSUEDREVISEDPAGENOREVISIONMODAYYEARMODA YYEAR1 of 4081597SB97-11 1997 TELEDYNE INDUSTRIES MOTORSAn Allegheny TELEDYNE Box 90 Mobile Alabama 36601 Ph. 334-438-3411 TELEDYNE CONTINENTAL AIRCRAFT ENGINESERVICE BULLETINC ompliance Will Enhance Safety, Maintenance or Economy ofOperationSUBJECT:INSTALLATION OF SINGLE PIECE ROCKER ASSEMBLY BUSHINGS PART NUMBERS 652129 AND 652963 PURPOSE:To insure correct installation of single piece rocker assembly bushingsCOMPLIANCE:At time of cylinder repair or overhaulMODELSAFFECTED:O-470, except A, E and J; IO-470, except J all IO-520;IO-550; TSIO-470; and TSIO-520, except AE; all TSIO-550, GTSIO-520,GIO-550-A and all TSIOL-550 ENGINE INFORMATIONThis service bulletin provides specific instructionfor installation of single piece rocker armbushings part numbers 652129 and 1 of this bulletin details the installation ofbushing part number 2 of this service bulletin details installation ofbushing part number OF SINGLE PIECE BUSHINGS, P/N652129 AND P/N 652963, IN ROCKER ARMSOTHER THAN SPECIFIED IN THIS SERVICEBULLETIN WILL RESTRICT OR BLOCK OIL FLOW TOTHE ROCKER ARM SHAFT AND VALVE GUIDESRESULTING IN POSSIBLE ENGINE INSTALLATIONPart 1.

2 Bushing P/N 652129 Bushing P/N 652129 may only be installed inrocker arms P/N 652130 and Prior to installing a new bushing, performboth a visual and magnetic particle inspectionof the rocker arm as detailed in the applicableengine overhaul Measure rocker arm bushing bore andinsure that it conforms to the dimensionsspecified in Figure Measure the new bushing and insure thatit conforms to the dimensions specified inFigure Insure that the bushing oil passages arepositioned as illustrated in Figure POSITIONED BUSHING OILPASSAGES WILL RESULT IN A LOSS OFLUBRICATION TO THE ROCKER ARM SHAFT,SEVERE ROCKER ARM BUSHING, SHAFT ANDVALVE GUIDE WEAR AND POSSIBLE Thoroughly oil the bushing with clean 50weight ENGINE Using Borroughs Tools P/N 8118 (RockerArm Bushing Remover/Installer Set) orequivalent and an arbor press carefully pressthe bushing into the rocker arm bushing must be installed flush to.

3 020 belowsurface. Refer to Figure Prior to reaming bushing to size, fill the twobushing oil holes with beeswax to preventdebris from entering the oil 3SB97-11 FAA APPROVEDS upersedes M93-7 ISSUEDREVISEDPAGE NO REVISIONMODAYYEARMODAYYEAR2 of 4081597SB97-11 TELEDYNECONTINENTAL MOTORSAn Allegheny TELEDYNE Box 90 Mobile Alabama 36601 Ph. 334-438-3411 Ream bushing to .7505 - .7515 with asurface finish of 32 RMS. Refer to Figure After reaming clean and flush the oil passageswith clean solvent removing beeswax andmaking certain that all passages are clear ofany Perform a visually and magnetic particleinspection of rocker arm assemble as detailedin the applicable ENGINE overhaul 2: BUSHING P/N 652963 Bushing P/N 652963 may only be installed inrocker arm P/N Prior to installing a new bushing, performboth a visual and magnetic particle inspectionof the rocker as detailed in the applicableengine overhaul Measure rocker arm bushing bore andinsure that it conforms to the dimensionsspecified in Figure Measure the new bushing and insure thatit conforms to the dimensions specified inFigure Before pressing the bushing in place, insurethat the oil passages are positioned asillustrated in Figure POSITIONED BUSHING OILPASSAGES WILL RESULT IN A LOSS OFLUBRICATION TO THE ROCKER ARM SHAFT,SEVERE ROCKER ARM BUSHING.

4 SHAFT ANDVALVE GUIDE WEAR AND POSSIBLE Thoroughly oil the bushing with clean 50weight ENGINE Using Borroughs Tools P/N 8118 (RockerArm Bushing Remover/Installer Set) orequivalent and an arbor press carefully pressthe bushing into the rocker arm bushing must be installed flush to .020 belowsurface. Reference Figure Prior to reaming bushing to size, fill the twobushing oil holes with beeswax to preventdebris from entering the oil passages. Ream bushing to .7505 - .7515 with asurface finish of 32 RMS. Reference Figure After reaming clean and flush the oil passageswith clean solvent removing beeswax andmaking certain that all passages are clear ofany Visually and magnetic particle inspectionrocker arm assemble as detailed in theapplicable ENGINE overhaul NO REVISIONMODAYYEARMODAYYEAR3 of 4081597SB97-11 TELEDYNECONTINENTAL MOTORSAn Allegheny TELEDYNE Box 90 Mobile Alabama 36601 Ph.

5 334-438-3411 EXHAUSTP/N 652130 INSTALLBUSHINGORIENTEDAS * 70o50oHOLES IN BUSHINGMUST BE LOCATED INTHESE POSITIONSFIGURE 1 INTAKEP/N 652131X 70o50oHOLES IN BUSHINGMUST BE LOCATED INTHESE * REFROCKER ARMOIL GROOVE Bushing O. D. must maintain a .0020 - .0065 Press Fit in a .8755 - .8725 Rocker ArmBushing NO REVISIONMODAYYEARMODAYYEAR4 of 4081597SB97-11 TELEDYNECONTINENTAL MOTORSAn Allegheny TELEDYNE Box 90 Mobile Alabama 36601 Ph. 334-438-3411 FIGURE 250o70oINTAKE &EXHAUSTP/N .463 . IN BUSHINGMUST BE LOCATED INTHESE POSITIONS Bushing O. D. must maintain a .0020 - .0065 Press Fit in a .8755 - .8725 Rocker ArmBushing X 45oCHAMFER BUSHING FLUSH TO .020 BELOW InchFIGURE 3 TYPICALB ushing must have a surface finish of 32 rms after reaming. These surfaces must be square within the center line of the bushing bore within .002 inch full indicator reading.


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