TM 5-6115-593-12TO 35C2-3-463-14-77. INJECTOR. (See figure 4-50.)a.Inspection. Inspect injector for looseness andsigns of leakage or smoking.b.Replacement.CAUTIONCleanliness is extremely important whenworking with fuel injectors. Infectionnozzle service troubles are, in mostinstances, caused by dirt. Use clean paperon the work bench and place componentsin a container of clean diesel fuel as theyare removed.(1) Remove rocker housing cover (7, figure 4-59) by removing bolts (5) and washers (4).(2) Remove rocker arm housing (8) by liftingstraight up. Mark its position for best fitduring reassembly.(3) Remove screws (1, figure 4-50), clamp (2),and link (3).CAUTIONUse care when removing injectors toprevent damage to the tip.(4) Remove injector from cylinder head usingan injector puller or by using two small prybars, or by using a slide hammer with anadapter.(5) Tag and number injectors by cylinder fromwhich they were moved.(6) Refer to next higher level of maintenancefor injector testing, repair, and calibration.(7) Position injector in cylinder head.(8) Install capscrew (1), clamp (2), and link (3).Tighten capscrews to 11 to 12 foot-pounds(15 to 16 joules) increments of 4 foot-pounds (5 joules).(9) Refer to paragraph 4-87 and adjust rockerarm associated with fuel injector beingreplaced.(10) Install rocker arm housing (see figure 4-59).(11) Install gear case cover (7, figure 4-59) usingbolts (5) and washers (4).4-78. TURBOCHARGER. (See figure 4-40.)a.Inspection.(See figure 4-51.)(1) Operate engine at approximate rated outputand listen for unusual turbocharger noiseand check for excessive black smoke. Donot mistake whine heard during rundown forone that indicates impeller shaft bearingfailure during operation. Other unusualnoises can result from improper clearancebetween turbine impeller and turbinehousing. If such noises are heard, replaceturbocharger. For repair of turbo charger,refer to next higher level of maintenance.(2) Inspect for an accumulation of dirt on thecompressor impeller vanes and in thecompressor housing.(3) Clean the turbocharger and surroundingarea with cleaning solvent, FederalSpecification P-D-680, Type II.(4) Loosen the clamps which secure air hose tothe turbocharger and remove the hose fromthe turbocharger. Remove air hose from aircleaner outlet to turbocharger inlet.(5) Inspect the turbocharger compressor wheeland compressor housing for dirt. If thecoating of dirt is light and even, cleaning thecompressor wheel is not necessary. Anuneven buildup of dirt will disturb thebalance of rotating parts and lead to failureof the turbocharger. If the coating4-113
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