TM-9-2815-200-35 Maintenance Manual for AVDS-1790-2M AVDS-1790-2A and AVDS-1790-2AM Engines Download
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Figure 4-88. Note. The fuel injection pump, fuel tubes, and fuel tube connections must be checked for fuel leaks with the engine running before the cooling fans are installed. Caution: Do not run engine above idle and not longer than ten minutes without cooling fans. 1. Install a fan rotor hub sleeve spacer -4910-795-7952 (A) on each fan drive vertical drive shaft to prevent oil seepage at fan drive oil seals while operating engine. 2. Secure the sleeve spacer (A) to each drive shaft with the same nut (B) used to secure the cooling fan. Start engine and check for fuel leaks. If leaks are evident loosen the tube fittings and retighten. Replace fuel injection tubes if leak persists. 3. Slide the 12 fuel injector tube dust caps (C) over tube fittings at fuel injection pump hydraulic head. Figure 4-87. Front fan drive housing fan rotor hub sleeve spacer-4910-795-7952 installed for leakage test. Section Ill. REPLACEMENT OF MAIN AND AUXILIARY OIL VALVE, OIL PRESSURE REGULATOR VALVE FUEL / WATER SEPARATOR FILTER FILTER BYPASS AND 4-5. General This section covers the replacement of the The two outer elements in the fuel / water main and auxiliary oil filter bypass valves, the oil separator filter are periodic maintenance items pressure regulating valve, and the fuel / water and are allocated to the organizational main- separator filter. The valves are not periodic tenance personnel. These are coalescer elements maintenance items, and should only be removed designated to separate water from the fuel for inspection or replaced in case of malfunction. system. The center element is a final fuel filter 4-44