Caterpillar DD9H

1974 - 1981

Bulldozer

Production
Manufacturer	Caterpillar
Bulldozer
Built in Peoria, Illinois, USA
The DD9H consisted of two D9H tractors connected in tandem. The operator controlled both machines from the front tractor using pneumo-hydraulic controls. The front tractor was fitted with a 12 CFM compressor and two air supply tanks.

Variants
DD9H	tandem D9s
SxS D9H	side-by-side D9Hs

Caterpillar DD9H Engine
Caterpillar 24.1L 6-cyl diesel
Fuel tank	460 gal*Combined capacity of both machines. 1741.1 L
Engine details ...

Caterpillar DD9H Transmission
3-speed power shift
Transmission details ...

Caterpillar DD9H Power
Engine (net)	820 hp 611.5 kW

Mechanical
Drive	crawler
Final drives	planetary
Cab optional with available air-conditioning.

Photos
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Dimensions & Tracks
Weight	178800 to 185400 pounds
24-inch tracks
Full dimensions and tracks ...

Caterpillar DD9H attachments
blade
Attachment details ...

Electrical
Charging system	alternator
Charging amps	50
Batteries	4
Battery volts	12
Battery AH	200

References

Track-Type Tractors published in 1980, by Caterpillar
D7G - D8K - D9H published by Caterpillar
Compact Sales Kit published in 1985, by Caterpillar

Page information

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Updated on February 22, 2022
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