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 , SLOTTED � NUT �I TA021519 re J./ 39. Remvving or i1"talli11g �tarter driven gear1l1aſt bearing cage a11acl1i11g paru. e. Remove starter driven gearshaft bearing cage (fig. 3-140) from crankcase assembly and remove and discard preformed packing. Remove jack screws from bearing cage. Figure 3-1. Removing or i11�1alling "artcr sear10/1 bearing cage. Section Ill. GENERAL REPAIR PROCEDURES 3-35. General "· The predures for cleaning, inspection, repair and assembly of the various parts and components which make up the engine sub-assemblies will be the same for a great percentage of parts and components. To avoid repetition, the general predures are detailed in paragraphs 3-86 through 3-41 and will be referenced throughout this chapter. b. Any cleaning, inspection, repair, and assembly procedures which are peculiar to a specific part or componPnt will be covered in the section or paragaph relating to that item. 3-36. Cleaning Instructions a. General. The importance of cleaning must be thoroughly understood by maintenance personnel. Great care and conscientious effort a1· e required in all cleaning operations. The presence of dirt or foreign material is a constant threat to satisfactory engine operation and maintenance. A dirty operation can result in cylinder scuffing or scratching, high oil consumption, bearing destruction, and a variety of component failures directly attributed to the en- trance of dirt. Maintain rigid cleaning standards during all phases of the cleaning operation. The following general instructions apply to all cleaning operations. {l) Clean all parts before inspection, after repair, 3-58 Change 3 and before assembly. (2) Hands should be kept free of any ac- cumulation of grease, which can collect dust and grit. (3) After cleaning, all parts should be covered or wrapped to protect them from dirt and dust ac- cumulation. b. Cti11gs. (1) Remove sludge and gum deposits using a stiff brush. (2) Clean all surfaces with dry-cleaning sol - vent (P-D-680, type II). Repeat operation if surface 8 is not free of scale or adhering material wltich might be dislodged later. air. air. (3) Blow out all tapped holes with compressed (4) After cleaning, dry casting with compressed WARNING Particles blown by compressed air are hazardous. Make certain air stream is directed away from usel' and that other persons are not exposed. Protect eyes and face with appropriate shields. c. Oil Psages. Particular attention must be given to all oil passages in machined parts. All oil passages must be free of obstructions. (1) Clean passages with wire 01· probes lo break ) ) )