Caterpillar RD7 '1935–40

Caterpillar RD7 '1935–40
Caterpillar RD7 '1935–40
 
 

Caterpillar D7 '1938–55

Caterpillar D7 '1938–55
Caterpillar D7 '1938–55
 
 

Caterpillar DW10 '1941–????

Caterpillar DW10 '1941–????
Caterpillar DW10 '1941–????
Caterpillar DW10 '1941–????
 

Caterpillar DW21 '1950–59

 
Caterpillar DW21 '1950–59
 
 

In late 1950 Caterpillar introduced the DW20 and DW21 self-propelled scrapers. The DW20 had a two-axle tractor configuration, and the DW21 used a single-axle tractor design. They were first publicly unveiled at the construction equipment Road Show, held in Chicago, Illinois, in August 1948. In 1955, the DW21 was upgraded into the DW21C.

Caterpillar DW15 '1954–????

Caterpillar DW15 '1954–????
 
 
 

Caterpillar 977D '1955–????

Caterpillar 619B '1959–????

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