(a)Disconnect andremove the oil inletline (2). -(b)Disconnect and remove the oil returnline (10). -(~)Loosen hose(15) clamp (13).(d) Remove thefour nuts (26)which attachturbocharger-(28) to theexhaust manifold.(e) Remove four screws (19) andwashers(20) which atiach diffuser ring (21) to the exhaustmanifold andremove diffuser (24)turbocharger (28).Refer to p a r a g r a p h 3 - 2 0 4 to remove diffuser (24) fromturbocharger (28).(2)CAUTIONWhile diffuser (24)turbocharger (28)is off the engine, keep all intakeand exhaust manifold openings cov-ered. Thiswill prevent foreign ob-jects from accidentally getting intothe manifoldsand damaging theturbocharger or engine when theengine is again put into operation.Installation.(a)Before installing the turbocharger:( 2 8 , f i g . 3 - 4 2 ) :1. Refer to p a r a g r a p h 3 - 3 2 andser-vice the aircleaiier.2. Refer to p a r a g r a p h 3 - 1 9 5 and re-place thelubricating oil filter elements.3. Refer to p a r a g r a p h 3 - 4 6 andchangeengine lube oil. –4. Ensure that the oil inlet line andoil return line a~e clean before they are connected.Remove the linesandinspect for cleanliness and re-strictions.5. Check exhaust manifold for cracks,foreign matter, iindproper mounting. Check conditionof gaskets,tightness of mounting nuts, andflatnessof theturbocharger mounting surfaces.6. Check intake manifold and air inletelbow and hoses for cracks, foreign matter, and gen-eral condition. Check condition of manifold mountingnutsand tightness of 28-33 foot-poundstorque.7. Replace any air or oil line hoseconnections ( 1 5 a n d 8 , f i g . 3 - 4 2 ) found to be deterior-ated.8. Ensure all airand oil line hoseclamps (13 and 7) are tight.9. Ensure the gaskets29)do not extend-into the port openings3 - 1 0 2 C h a n g e 1(9,16,25, andof the exhaustmanifold, turbocharger mounting adaptor, andmounting pads.10.Just prior to mounting the unit, primethe lubr~ation system. Pourclean oil into the oil in-let of thecenter housing. Turn therotating assemblyby hand to coat the bearingsandthrust collar with oil.(b)Refer to p a r a g r a p h 3 - 2 0 4 to installdiffuser (24)o~ turbocharger (28).(c)Install a new gasket (29) and mountthe turbocharger (28)and diffuser ring (21) on the ex-haust manifold. Lubricate the fournuts(26) with anti-seize compound Military Specification MI L-A-1 3881 R,and secure the turbocharger (28) to the exhaustmani-fold tightening nuts (26) to 18-21 foot-pounds torque,andtightening screws (19).(d) Connect the oil inlet line (2)to thelubricating oil–supply.CAUTIONDo notconnect the oil inlet orreturn lines (2 and 10) to theturbocharger (28) until it iscertain that there is a free flowof oil to the turbocharger andthrough it.CAUTIONDo not crank start motor morethan 15 seconds at a time. Al-low at least 3 minutes to elap-se between crankings.(e)Place dead crank switch in openposition ( 4 9 , f i g . 3 - 2 7 ) . HoldENGINE START-RUN-STOP switch to START position. Continue crankingengine until there is a free flow of oil from the upperendof the oil inlet line, then connect the line to theoil inlet of the turbocharger center housing. Crankthe engine until oil runs from the oil outlet of the cen-ter housing. Return switch to STOP position. Placedead crank switch in on position.(f) Connect the oil return line (1 O) to theturbocharger (28) and to the side of the cylinderblock.(g) Connect the air cleaner hose assem-bly using inspection instructions (a above) in reverse—order.(~) Install the exhaust pipe, mufflerand nozzle.(i) Upon completion of the installation,run engine, an–d check turbocharger operation.3 - 2 0 4 . E x h a u s t D i f f u s e r .a. Inspection. Inspect diffuser (24) for cracks,loos= mounting, and other damage.
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