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The Mack R series (also known as the Mack Model R) is a series of trucks that was manufactured by Mack Trucks from 1966 to 2005. The successor of the Mack B series , [ 2 ] the R was a heavy-duty truck (Class 8) with a conventional (bonneted) cab configuration.
AC series 5,5 ton truck "Old # 1"- Bus 1900 Manhattan Series- 1903; Junior Series- 1909; AB Series- 1914-1920; AC Series- 1916-1939; AK Series- 1928-193?, 3½–5 ton high speed carrier [1]
1965: The R Model Series introduced, to replace the B Model Series. Some R series models continue in production until 2005. 1966: The RL (for R-Western) model built at Hayward, California until 1981. 1967: The CF model Fire Engine introduced, replacing the C model. The CF was a cab forward adaptation of the cab over style commercial "F" Model ...
Designed by Mack, they used many components from the NO series. A LeRoi T-H844 844 cu in (13.8 L) overhead valve V8 cylinder gasoline engine developed 297 hp (221 kW) at 2600 rpm. Mack built 392 M123s, used with a lowboy trailer to recover and transport tanks, and all 552 M125s, between 1955 and 1957.
Gasoline engines up to WWII were often valve in block design (L-head), during the war more overhead valve (ohv) engines were used, and after the war all new engines (except 1 F-head and 1 Overhead camshaft (ohc)) have been ohv. All diesel engines have ohv, they can be naturally aspired, supercharged (SC), or turbocharged (TC).
Large Mack trucks from the 1970s such as the Mack R-600 used coolpower systems. Some coolpower systems used vertical bar shutters that could be opened and shut in front of the radiator to maintain proper operating temperature. The Mack Cruise Liner model built in 1984, a 6X4 Primemover, used a 320 horsepower (240 kW) coolpower engine. [1]
The Mack Valueliner is a heavy-duty truck that was introduced by Mack Trucks in Australia in 1986 to replace the Mack R model. [1] Its production lasted for six years, until it was replaced by the CHR & CLR models.
TM 10-1679 Maint Manual for Mack Models NO 2, 3, & 6. US War Dept. 1943; ORD 7 SNL G-792 (31 January 1958) Section I, LeRoi engine parts. TM 9-8002 (1 November 1955) TM 9-8003-1 (25 June 1956) Ordnance Maint. for Engine, Accessories and Clutch; TM 9-2320-206-ESC (ESC stands for Equipment Serviceability Criteria)
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