TM-9-2815-220-34 Direct Support Manual for AVDS-1790-2C and AVDS-1790-2D Engines Download
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) b. Clean i n g, I nspection and Repair. (1) General. Refer to paragraphs 3-36 through 3-38. (2) Fuel Injection Pump Fuel Tubes. Flush the fuel tube assemblies with a rugh pressure nushjng device. After flushing, blow dry with compressed afr and plug tube ends with plugs or caps to assure cleanliness. Inspect tubes for correct inside diameter hose dimension. The correct inside dimension is 0.08 l 5-0.0865-iJ1ch. Tubes with larger or sma Iler hole cliameler are to be d iscarcl eel. Carefully nspect all tubes for proper configuration using a current preformed tube of like function for comparison. Excessive bending or hand rming creates high stress points and greatly reduces tube Hfe. Discard any tube that deviates from preformed comparison tube configuration. Inspect tube assemblies for cracks, splits or kinks. Inspect the compression sleeves (fig. 3-285), compression nuts, support sleeves and support nuts r defects or damage. Refer to figure 3-285 r comparison of sleeve fittings shown i11 serviceable and unservice- able condition. Straighten minor bends in tubing when possible. Dfacard entire tube assembly if fit- tings are damaged or tubing has been kin.keel. (3) Nozzle fuel return tubes and hoses. Clean nozzle fuel retu tubes and hoses thoroughly. In- spect tube and hose connections for cracks, or mutilated sealing surfaces. Inspect hoses for plia- bility or signs of deterioration. (4) F11 el injection pump fuel retii1·n hose. Pres- sure check fuel injection pump fuel retu hose to a proof pressure of 200 psi. Replace hoses that are unserviceable. c. Assembly. Fuel injection pump fuel tubes and nozzle fuel retu hoses will be assembled during engine assembly. 3-138. Injection Pump and Turbosuper- charger 011 Hoses a. Disassembly. The injection pump and tur- bosupercharger oil hoses were disassembled dur- ing disassembly of engine. b. Cleaning, I n s pect ion, and Repair. Refer to paragraphs 3-36 through 3-38. Inspect fuel injec- tion pump and turbosupercharger oil hoses r cracks, frayed or chafing of the woven metal sheathing. Check hose connections for cracks or damage. Replace hose connections when hose damage is apparent. - I Sf b I '• l \ • . ' ' f ) { c '.'f �� •• ·,1 • TM 9-2815-220-34 I ) �� = r ·· � I '" •• J � i • E . ·, • t� "t- . I figure s.£85. Compc+·is<>11 of sel"uiccoble sleeves - i11jcctor nozzle tube emls. c. Assembly. Injection pump and turbosuper- charger oil hoses will be assembled during engine assembly. 3-139. Generator Oil Lines and Associated Parts - Model AVDS-1790-2C Engine a. Discissembly. The generator oil lines and as- sociated parts were disassembled during disas- sembly of engine. b. Clecming, Inspecti on, and Repair. Refer to paragraphs 3-36 Lhrough 3-38. Inspect generator oil hoses for cracks, frayed or chafing of the woven metal sheathing. Check hose connections for cracks or damage. Check fittings and connections for damaged threads, nicks and sc1·atches. Replace unserviceable parts. c.Assembly. Generator oil lines will be assembled during engine assembly. Change 3 3·197