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 Table 2·3. Dintic Tes - Continued Prtdur e 15. Engine Low Power Tesls DT 15.1 High Idle (no load) Test: NOTE Use a calibrated tachometer for this test. 1. Refer to Item 19.1 for precaulion· ary steps to taken fore operating engine. 2. Start engine and warm-up to nor· mal opcrali ng temperature (14F). a. Engine speed ú0-10 rpm. Anal pi s a. Speed is normal and governor no-load adjustment is proper. 3. With transmiion in "neutral" depre accelerator pedal fully for approximately JO seconds. b. Engine speed below ú0 rpm. b. Speed tꝏ low. c. Engine speed exceeds 0 rpm. c. Speed tꝏ high. r 15.2 "Stall" Test: NOTE Use a calibrated tachometer for this test. I. Refer lo item 19.l for precaution- ary steps to be taken before operating engine. CAUTION Do not conduct "stall test" more than sec- onds and/or continue "stall" if transmiion oiI temperature warning light comes "ON". 2. Start engine and warm to normal operating temperature (14 F.). 3. With vehicle brakes applied and transmission in "high range", depre accelerator pedal Cully and operate engine for 4 sec- onds (max.); lea accelerator pedal and allow engine idle one minute. a. Engine speed reading low 1P0 rpm. a. Engine and transmission partially warmed up (continued predure 4). 4. Repeat 3 above, but operate engine for seconds (max.). a. Engine speed 1P0-1950 rpm. a. Engine power is normal. b. Engine speed below 1P0 rpm. b. Power is below normal. c. Engine speed above 192 rpm. c. Transmission is slipping or engine O\'erfueled. Section Ill. REMOVAL AND INSTALLATION OF MAJOR COMPONENTS AND ACCESSORIES 2-14. General a. Sections III through VI of this chapter cover replacement of engine accessories, and removal and replacement of components related to inspection, ad· justment and service operations allocated to Direct Support maintenance personnel. Some accessories, engine components or service operations can be ac- complished while engine is installed in vehicle, but is dependent upon how accessible the item is. Engines which have been removed from the vehicle for ac· cessory replacement should be thoroughly cleaned before replacement of accessory is attempted. b. Refer to pertinent vehicle technical manuals for instructions on the removal or in'stallation of the 2-32 Change 2 power plant and separation of the transmission from the engine. 2-15. Specific Instructions a. Cleanli11ess. Extreme care must be exercised to insure that dust and dirt, even in minute quantities, dœs not enter the engine. Plug or cover all fuel and oil line connections to prevent entry of dirt. Clean parts thoroughly and coat all surfaces of bearings, shafts and contact surfaces with engine oil (OE). Sur- faca must be protected from dirt afte1· oiling. b. Gaskets. Always use new gaskets and preformed packings when reinstalling engine components. c. TorqtLe Tiglitening Attaching Hardware. Apply I