Comparing the Allis Chalmers HD20 and the Caterpillar D6D SA Special Application

This page provides a detailed comparison of the specifications for the Allis Chalmers HD20 and the Caterpillar D6D SA Special Application. Explore key differences and similarities across various aspects, including Operating Weight, Cylinders and Type.

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Allis Chalmers HD20 Tractor
Allis Chalmers HD20 Tractor
Allis Chalmers HD20 Tractor
Allis Chalmers HD20 Tractor
Allis Chalmers HD20 Tractor
Allis Chalmers HD20 Tractor
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SpecificationAllis Chalmers HD20Caterpillar D6D SA Special Application
General Information
Manufacturer
Allis Chalmers
Caterpillar
Model
HD20
D6D SA Special Application
Category
Industrial
Specialized
Engine
Manufacturer
General Motors
Caterpillar
Model
3306
Rated RPM
1,700RPM
2,000RPM
Cylinders
6
6
Displacement
660ci
638ci
Bore
5in
4.75in
Stroke
5.6in
6in
Transmission
Type
Torque converter
Gear
Dimensions & Weight
Length
191in
156in
Width
94in
Height
95in
124in
Operating Weight
41,000lb
29,000lb
Hydraulics
System Type
Open Center
Electrical
Starter Type
24 volts
Electric Starter
Capacities
Coolant
60qts
40qts
Operator Station
Type
Open