Page "Mack Trucks" Paragraph 142

Mack started to produce the R and U Model in the early 1960s for highway use, and the RD and DM Models for construction use.

The 4 models featured the same cab ; the U and DM had the cab offset to the left, and the early RD and DM had 3-piece steel hoods.

They later had 1-piece hoods, the RD had a new hood, and the DM the U hood.

In the late 1980s, the R and U Models were discontinued and the RB was introduced, mostly for severe-duty applications.

The hood was modified slightly for the model RB.