EQUIPMENT DESCRIPTION AND DATA
EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES
The 621B Scraper provides the Army with the capability to efficiently build roads, airstrips and other engineering
assets in a wide variety of geographic, environmental and tactical situations.
The scraper self-loads, hauls, dumps and spreads earth, thereby providing grading capability from start to finish of
Capabilities and Features.
Refer to Equipment Data at the end of this work package for machine dimensions, weights, fluid capacities
and other miscellaneous equipment data.
The scraper consists of two sections: front tractor section and rear scraper section.
The scraper can be transported by trailers, rail or marine vessels. The tractor front section has the following capa-
bilities and features:
CaterpillarŪ 3406 turbocharged diesel engine with six in-line cylinders, generating 330 horsepower @
Integral ether cold start for engine startup down to -25°F (-32°C)
CaterpillarŪ semi-automatic powershift, transmission with eight forward speeds and one reverse
Operator cab with adjustable seat
Front full-floating drive axle with outboard planetary final drives
Differential lock control to reduce wheel slippage when high traction is required
Articulated frame steering with two double-acting steering cylinders
Oil sampling valves for engine, transmission, differential and hydraulic systems
NATO slave receptacle
The scraper rear section has the following capabilities and features:
Bowl with a rated load of 40,000 lb (18,144 kg) and 14 yd3 (11 m3)
Interchangeable and reversible cutting edges, with center section predrilled to allow installation of four
Dozer-type ejector for rapid unloading