TM 5-3805-248-10
EQUIPMENT DESCRIPTION AND DATA
EQUIPMENT CHARACTERISTICS, CAPABILITIES, AND FEATURES
1.
Characteristics.
a.
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.
b.
The scraper self-loads, hauls, dumps and spreads earth, thereby providing grading capability from start to finish of
a job.
2.
Capabilities and Features.
NOTE
Refer to Equipment Data at the end of this work package for machine dimensions, weights, fluid capacities
and other miscellaneous equipment data.
a.
The scraper consists of two sections: front tractor section and rear scraper section.
b.
The scraper can be transported by trailers, rail or marine vessels. The tractor front section has the following capa-
bilities and features:
(1)
Caterpillar 3406 turbocharged diesel engine with six in-line cylinders, generating 330 horsepower @
1,900 RPM
(2)
Integral ether cold start for engine startup down to -25F (-32C)
(3)
Caterpillar semi-automatic powershift, transmission with eight forward speeds and one reverse
(4)
Operator cab with adjustable seat
(5)
Front full-floating drive axle with outboard planetary final drives
(6)
Differential lock control to reduce wheel slippage when high traction is required
(7)
Articulated frame steering with two double-acting steering cylinders
(8)
Oil sampling valves for engine, transmission, differential and hydraulic systems
(9)
NATO slave receptacle
c.
The scraper rear section has the following capabilities and features:
(1)
Non-drive axle
Bowl with a rated load of 40,000 lb (18,144 kg) and 14 yd3 (11 m3)
(2)
(3)
Interchangeable and reversible cutting edges, with center section predrilled to allow installation of four
cutting teeth
(4)
Dozer-type ejector for rapid unloading
