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Tractor · 1948Unverified

Allis Chalmers WD

Name: Allis Chalmers WD
Brand: Allis Chalmers

Allis Chalmers WD — Row-Crop tractor · 26 hp. Reference specifications; pending source verification.

The Allis Chalmers WD is a tractor with an approximate power rating of 26 hp, positioning it within the lighter class of tractors. It was manufactured between 1948 and 1953. The tractor features a 4-cylinder petrol liquid-cooled engine and two-wheel drive with a 4-speed gearbox. Its operating weight is listed at 1587 kg, with an operational capacity of up to 200 ac.

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

Rated power

26 hp

Max power

18.1 kW

Weight

1587 kg

Catalogue coverage

Variants represented

Richest spec table

85 rows

Recorded power

26 hp

Recorded weight

1587 kg

Transmissions

4-speed non-synchronized gear

Production years

1948-1953

Verified variants

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

Hover a source tag to verify

Overview

ManufacturerAllis ChalmersReference

Row-Crop tractorReference

Built in West Allis, Wisconsin, USAReference

Total built146,125Reference

Original price$1,830Reference

The Allis-Chalmers WD featured Two-Clutch Power Control and power-shifted rear wheels. The dual clutch system used a foot-operated dry clutch to disconnect the PTO and driveline from the engine. A hand-operated wet clutch allowed the PTO to operate while the tractor was slowed or stopped.Reference

Two-wheel driveReference

Steeringmanual worm and horizontal sectorReference

Manual external compression band type brakesReference

Open operator station.Reference

Engine

Allis Chalmers 3.3L 4-cyl tractor fuelReference

Allis-Chalmers 3.3L 4-cyl gasolineReference

Drawbar (claimed)14.2 kWReference

Drawbar (tested)22.5 kWReference

Belt (tested)25.8 kWReference

Allis ChalmersReference

tractor fuelReference

4-cylinder 8-valveReference

liquid-cooled vertical I-headReference

Displacement3.3 LReference

Bore/Stroke102 x 102 mmReference

Compression4.5:1Reference

Rated RPM1400Reference

Firing order1-2-4-3Reference

StarterelectricReference

Starterhand crankReference

Starter volts6Reference

Coolant capacity13.2 LReference

Allis-ChalmersReference

gasolineReference

In 1953 (SN 136318) a distributor ignition system replaced the older magneto system.Reference

Compression5.75:1Reference

Belt power (max)19.5 kWReference

Max power18.1 kWReference

Belt power (max)25.8 kWReference

Max power22.5 kWReference

Transmission

4-speed non-synchronized gearReference

Typenon-synchronized gearReference

Gears4 forward and 1 reverseReference

PTO & Hydraulics

PTO (claimed)19.4 kWReference

Hydraulic system4.7 LReference

Typeopen centerReference

Capacity4.7 LReference

Pressure82.7 barReference

Valves1Reference

Rear TypeSingle Hitch PointReference

Rear PTOtransmissionReference

Rear PTOliveReference

Rear PTO Type540Reference

Capacities

Fuel56.8 LReference

Dimensions

Wheelbase223 cmReference

Weight1587 kgReference

Front tire5.50-16Reference

Rear tire11-28Reference

Ag front5.50-16Reference

Ag rear11-28Reference

Ag rear12-28Reference

Length322 cmReference

Height207 cmReference

Operating weight1587 kgReference

Ballasted weight2290 kgReference

Rear tread141 to 228 cmReference

WD Serial Number Location

The WD serial number is stamped into the rear of the transmission case on the left side.Reference

WD Serial Numbers

19487Reference

19499250Reference

195035445Reference

195172328Reference

1952105182Reference

1953131243Reference

FAQ: How to read a serial number table.Reference

Electrical

GroundpositiveReference

Charging systemDelco generatorReference

Battery volts6Reference

Test results

NTTL 399: tractor fuel 4-speed 2WDReference

NTTL 440: gasoline 4-speed 2WDReference

Tractor fuel 4-speed 2WDJuly 16 - 30, 1948Link: Nebraska Tractor Test 399 fileReference

Belt fuel use (max)10.2 l/hourReference

Drawbar performanceReference

Gear 2 used for power test.Reference

Max pull1552 kgReference

Gear 1 used for pull test.Reference

Gasoline 4-speed 2WDMay 17 - June 1, 1950Link: Nebraska Tractor Test 440 fileReference

Belt fuel use (max)12.1 l/hourReference

Gear 3 used for power test.Reference

Max pull1952 kgReference

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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