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Industrial Tractor · 1974Unverified

Caterpillar DD9H

Name: Caterpillar DD9H
Brand: Caterpillar

Caterpillar DD9H — Bulldozer · 820 hp. Reference specifications; pending source verification.

The Caterpillar DD9H is a high-powered industrial tractor, with a rating of 820 hp, positioning it among the more powerful machines in its class. Manufactured from 1974 to 1981, this model features a 6-cylinder turbocharged diesel liquid-cooled engine, which powers a tracked undercarriage with a powershift transmission. The listed weight for the DD9H is 178,800 to 185,400 pounds. It is designed for use on large areas of land, typically exceeding 1,500 acres.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

820 hp

Weight

178800 to 185400 pounds

Catalogue coverage

Variants represented

Richest spec table

44 rows

Recorded power

820 hp

Transmissions

3-speed power shift

Production years

1974-1981

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

ManufacturerCaterpillarReference

BulldozerReference

Built in Peoria, Illinois, USAReference

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.Reference

DrivecrawlerReference

Final drivesplanetaryReference

Cab optional with available air-conditioning.Reference

Variants

DD9Htandem D9sReference

SxS D9Hside-by-side D9HsReference

Engine

Caterpillar 24.1L 6-cyl dieselReference

Fuel tank1741.1 LReference

Engine (net)611.5 kWReference

Caterpillar D353Reference

turbocharged dieselReference

6-cylinderReference

liquid-cooled inlineReference

Displacement24.1 LReference

Bore/Stroke159 x 203 mmReference

Power (net)611.5 kWReference

StarterelectricReference

Starter volts24Reference

Oil capacity42.6 LReference

Coolant capacity155.2 LReference

Transmission

3-speed power shiftReference

Typepower shiftReference

Gears3 forward and reverseReference

The Caterpillar DD9H consisted of two linked tractors so it had two D353 engines. Figures shown, except horsepower, are for a single engine.Reference

Dimensions

Weight178800 to 185400 poundsReference

24-inch tracksReference

9C dozer length1290 cmReference

Height (cab)363 cmReference

Height (exhaust)375 cmReference

Shipping weight81103 kgReference

Operating weight84097 kgReference

Gauge228 cmReference

Caterpillar DD9H attachments

bladeReference

Electrical

Charging systemalternatorReference

Charging amps50Reference

Batteries4Reference

Battery volts12Reference

Battery AH200Reference

Caterpillar DD9H Tracks

Width60 cmReference

Length on ground335 cmReference

Area on ground4.1 m²Reference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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