. Automotive industries . sector measures 6 x 12 in. The brake is operated by meansof a double armed lever, whose axis extends across thechassis frame, the two arms being linked to the uppersector on one side and to the lower sector on the otherside of the center. All bearing surfaces on the operatingmechanism are liberal. The new dual reduction AB truck will share with thechain driven model a number of other improvements,such as the new engine crankcase having 3 gal. oil capac-ity, as compared with 1% gal. on the old engine, and thenew Mack unit powerplant clutch and transmission, bothbuilt c
. Automotive industries . sector measures 6 x 12 in. The brake is operated by meansof a double armed lever, whose axis extends across thechassis frame, the two arms being linked to the uppersector on one side and to the lower sector on the otherside of the center. All bearing surfaces on the operatingmechanism are liberal. The new dual reduction AB truck will share with thechain driven model a number of other improvements,such as the new engine crankcase having 3 gal. oil capac-ity, as compared with 1% gal. on the old engine, and thenew Mack unit powerplant clutch and transmission, bothbuilt complete in the New Brunswick plant. In generaldesign, this transmission is similar to the stock trans-mission formerly used, but it incorporates a number ofimprovements. The main shaft is splined, the spliningbeing of the interrupted type, in which the gears areguided on ground surfaces between two sets of is said to give a much easier sliding action and 12 AUTOMOTIVE INDUSTRIES THE AUTOMOBILE January 6, 1921. Spring anchorages, rear wheel brake and side elevation of rear axle. Note inclined position of differen-tial housing greater rigidity. The case is larger and holds more lu-bricant. An extension counter-shaft with a keyed powertake-off is standard equipment. The standard pump mounting is provided on the side of the caseto receive a pump for the inflation of pneumatic control has been simplified by the elimination of thereverse latch trigger. Instead, the lever is one solid pieceand the reverse lock is released by depressing the entirelever. A demonstration of three Mack model AB trucks wasgiven before a number of trade paper representatives inthe upper part of New York City on Dec. 15. The threetrucks were equipped with chain, worm and dual reduc-tion drive, respectively. They were all built to the samespecification as to weight (approximately 5800 lb.), powerdelivered to the final drive, and gear ratios, the motorsall being governed to 12
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
