TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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6-211 Figure 6-249. Comparison of serviceable sleeves-injector nozzle tube ends. (2) Nozzle fuel return tubes Clean nozzle fuel return tubes thoroughly. Inspect tube and hose and hoses. and hoses connections for cracks, or mutilated sealing surfaces. Inspect hoses for pliability or signs of deterioration. Note. Due to design change, there are two types of fuel returns used on engines. Original production engines had a rigid preformed metal tube, while improved design engines have a flexible rubber hose. (3) Fuel injection pump fuel return hose. Pressure check fuel injection pump fuel return hose to a proof pressure of 200 psi. Replace tubes that are unserviceable. c. Assembly. Fuel injection pump fuel tubes and nozzle fuel return tubes will be assembled during engine assembly, Chapter 7. 6-61. Injection Pump and Turbosuper- charger Oil Hoses a. Disassembly. The injection pump and turbosupercharger oil hoses were disassembled during disassembly of engine, Chapter 5. b. Cleaning, Inspection, and Repair. Refer to paragraph 6-2 through 6-4. Inspect fuel injection pump and turbosupercharger oil hoses for cracks, frayed or chafing of the woven metal sheathing. Pressure check the turbosupercharger oil inlet hose to a proof pressure of 300 psi. Pressure check the turbosupercharger oil inlet hose to a proof pressure of 200 psi and oil supply hose to 160 psi. Check hose connections for cracks or damage. Replace hose connections when pressure check indicates a leak or hose damage is apparent. c. Assembly. Injection pump and tur- bosupercharger oil hoses will be assembled during engine assembly, Chapter 7.