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The ''Mack R Model'' was a Class 8 heavy-duty truck first introduced in the early 1960s by Mack Trucks, to replace the very successful ''Mack B Model''.〔(Corporate History ) - Mack Trucks.com〕 Its production ran for 40 years until the ''RD'' model was discontinued in 2002 and the ''RB'' and ''DM'' models were discontinued in 2005. The first ''R'' models introduced were powered by Mack Thermodyne diesel and gasoline engines. In 1973 the ''R'' cab was given a makeover to include a deeper rear wall for more room and a new dashboard design. ==Model numbers and letters== *''R'' - Standard model *''RB'' - Set back front axle (except in New Zealand - see NZ Mack RB) *''RD'' - Heavy Duty R *''RM'' - 4x4 Municipal/maintenance chassis *''RMM'' - 6x6 Municipal/maintenance chassis *''RS'' - Western R series, S stands for steel frame *''RL'' - Western R series, L stands for Aluminum frame *''RW'' - Western series, replaced by the Mack Super-Liner *''U'' - Short hood offset cab *''DM'' - Heavy duty U *''DMM'' - All wheel drive DM *Chassis numbers (GVW Rating): * *4xx - * *6xx - * *7xx - * *8xx - Note: the xx is the place holder for the engine code. *Suffix letters: * *T - Tractor * *S - Six wheel chassis * *L - Light weight components * *X - Extreme duty 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mack R series」の詳細全文を読む スポンサード リンク
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