The Allis Chalmers HD-4 Loader is a tractor with a rating of approximately 52 hp, positioning it within the lighter end of its class. In production from 1966 to 1969, the HD-4 Loader features a 4-cylinder diesel liquid-cooled engine and a tracked undercarriage with a 3-speed gearbox. The operating weight of the HD-4 Loader is listed as 5624 kg, while its operational range is up to 200 acres.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
52 hp
Weight
5624 kg
Catalogue coverage
Variants represented
2
Richest spec table
49 rows
Recorded power
52 hp
Recorded weight
5624 kg
Transmissions
3-speed torque converter
Production years
1966-1969
Verified variants
0
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Overview
ManufacturerAllis ChalmersReference
Industrial Crawler tractorReference
DrivecrawlerReference
External band brakesReference
Open operator station.Reference
Variants
HD-4crawlerReference
HD-4 Loaderloader-crawlerReference
Engine
Allis Chalmers 3.3L 4-cyl dieselReference
Fuel tank68.1 LReference
Engine (gross)38.8 kWReference
Allis ChalmersReference
dieselReference
4-cylinderReference
liquid-cooledReference
Displacement3.3 LReference
Bore/Stroke99 x 108 mmReference
Power (gross)38.8 kWReference
Air cleanerdryReference
Compression16.25:1Reference
Rated RPM2100Reference
Torque191.9 NmReference
Torque RPM1600Reference
StarterelectricReference
Starter volts12Reference
Oil capacity7.6 LReference
Coolant capacity15.1 LReference
Transmission
3-speed torque converterReference
Typetorque converterReference
Gears3 forward and reverseReference
Clutchhydraulic discReference
Oil capacity11.6 LReference
PTO & Hydraulics
Pressure112.0 barReference
Pump flow56.8 lpmReference
Pump flow94.6 lpmReference
Dimensions
Weight5624 kgReference
10-inch tracksReference
Length392 cmReference
Width167 cmReference
Height (hood)187 cmReference
Clearance (drawbar)25 cmReference
Gauge129 cmReference
Allis Chalmers HD-4 Loader attachments
front-end loaderReference
HD-4 Loader Serial Numbers
Location:Serial number on the front of the crawler, below the grill.Reference
Allis Chalmers HD-4 Loader Tracks
Width25 cmReference
Length on ground177 cmReference
Area on ground0.5 m²Reference
Width30 cmReference
Area on ground0.5 m²Reference
Ground pressure0.5 barReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.
