MIL-DTL-62177E AVDS-1790-2 Engine Series Specification Download
Page 24 of 26
MIL-DTL-62177E 24 l. If the first article test will be the NATO cycle (see 4.6.4.1.2). m. Packaging requirements (see 5.1). n. Engine diesel type; applicable drawing no., title, date, part number (see 6.6). 6.3 Exhaust smoke measurement. A Bosch model EFAW 68 smoke meter or equal (as approved by the Government), and model EFAW 65 sampling pump or equal (as approved by the Government) have been found satisfactory in determining the degree of smoke density. The following may be used to visually define the degree of exhaust smoke density in lieu of the smoke meter: Description of exhaust smoke Classification Clear Haze Light Gray Medium Gray Dark Gray to Black 1 2 3 4 5 NOTE: Observation of exhaust smoke should be made against a white background within 3 ft of the exhaust outlet (see 3.3.10 and 4.6.2.1.7). 6.4 Leakage. The following definitions will be used for leakage (see 3.3.1 and 4.5.2). a. Weep. Slight loss of fluid which causes staining or discoloration of surfaces (usually dry to the touch). b. Seep. Any recurring evidences of fluid that does not result in the formation of a droplet (usually moist to the touch). c. Droplet. Loss of fluid which forms no more than one drop per hour. d. Leak. Loss of fluid which forms more than one drop per hour. The term “drop” is defined as a volume of fluid equal to 0.05 cm 3 . 6.5 Engine configuration. a. Bare engine. The term “bare engine” is defined as a -2, -2A, -2D, -2DR, or -2DA engine without air cleaners, mufflers or generator and less all other power consuming accessories not considered essential for the operation of the engine. In addition, the -2DA “bare engine” excludes the Dust Ejector of the Clean Air System. b. Basic engine. The term “basic engine” is defined as a -2C or -2CA engine without air cleaners or mufflers but with a generator (alternator) operated with field excitation and minimum external electrical load. In addition, all other power consuming accessories not considered essential for the operation of the engine are