Allis-Chalmers WD Specs ( 1948-1953 )
Overview
The Allis-Chalmers WD is a row-crop farm tractor produced between 1948 and 1953 in West Allis, Wisconsin, with 146,125 units manufactured. It is equipped with a 3.3L four-cylinder engine and a four-speed non-synchronized gear transmission, reaching a tested maximum of 34.63 belt horsepower in its gasoline configuration. The model features a two-clutch power control system and power-shifted rear wheels to support its 3,500-pound operating weight.
Ideal Applications
Tested Performance Output:
In Nebraska Tractor Test 440, the gasoline engine configuration produced a maximum of 34.63 belt horsepower and achieved a maximum drawbar pull of 4,304 lbs in first gear.
Driveline and Clutch Configuration:
The WD is equipped with a two-clutch system featuring a foot-operated dry clutch to disconnect the driveline and a hand-operated wet clutch that allows for continuous PTO operation while the tractor is stopped.
Chassis and Tread Dimensions:
This row-crop tractor utilizes power-shifted rear wheels with an adjustable rear tread ranging from 55.6 to 90.1 inches and is built on an 88.1-inch wheelbase.
Production
| Description | Row-Crop tractor / Built in West Allis, Wisconsin, USA / 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. |
|---|---|
| Manufacturer | Allis Chalmers |
| Original price | $1,830 |
| Total built | 146,125 |
Engine
| Engine type | Allis Chalmers 3.3L 4-cyl tractor fuel / Allis-Chalmers 3.3L 4-cyl gasoline |
|---|---|
| Bore/Stroke | 4.00x4.00 inches (102 x 102 mm) / 4.00x4.00 inches (102 x 102 mm) |
| Compression | 4.5:1 / 5.75:1 |
| Coolant capacity | 14 qts (13.2 L) |
| Description | Allis Chalmers / tractor fuel / 4-cylinder 8-valve / liquid-cooled vertical I-head / Allis-Chalmers / gasoline / 4-cylinder 8-valve / liquid-cooled vertical I-head / In 1953 (SN 136318) a distributor ignition system replaced the older magneto system. |
| Displacement | 201 ci (3.3 L) / 201 ci (3.3 L) |
| Firing order | 1-2-4-3 / 1-2-4-3 |
| Rated RPM | 1400 / 1400 |
| Starter | electric / electric |
| Starter volts | 6 / 6 |
| Engine type | Allis Chalmers 3.3L 4-cyl tractor fuel / Allis-Chalmers 3.3L 4-cyl gasoline |
| Belt (tested) | 34.63 hp (25.8 kW) |
| Drawbar (claimed) | 19 hp (14.2 kW) |
| Drawbar (tested) | 30.23 hp (22.5 kW) |
| PTO (claimed) | 26 hp (19.4 kW) |
Transmission
| Gears | 4 forward and 1 reverse |
|---|---|
| Transmission type | 4-speed non-synchronized gear |
| Type | non-synchronized gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Manual external compression band type brakes |
| Drive type | Two-wheel drive |
| Steering | manual worm and horizontal sector |
Capacity
| Fuel | 15 gal (56.8 L) |
|---|---|
| Hydraulic system | 1.25 gal (4.7 L) |
Hydraulics
| Capacity | 1.25 gal (4.7 L) |
|---|---|
| Pressure | 1200 psi (82.7 bar) |
| Type | open center |
| Valves | 1 OptOptional |
Hitch
| Rear Type | Single Hitch Point |
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PTO
| Rear PTO | transmission |
|---|---|
| Rear PTO Type | 540 |
Electrical
| Battery volts | 6 |
|---|---|
| Charging system | Delco generator |
| Ground | positive |
Dimensions & Tires
| Ag front | 5.50-16 |
|---|---|
| Ag rear | 11-28 / 12-28 |
| Ballasted weight | 5050 lbs (2290 kg) |
| Height | 81.5 inches (207 cm) |
| Length | 127 inches (322 cm) |
| Operating weight | 3500 lbs (1587 kg) |
| Rear tread | 55.6 to 90.1 inches (141 to 228 cm) |
| Wheelbase | 88.1 inches (223 cm) |
| Front tire | 5.50-16 |
| Rear tire | 11-28 |
| Weight | 3500 lbs (1587 kg) |
| Wheelbase | 88.1 inches (223 cm) |
Nebraska Tractor Test 399
| Belt fuel use (max) | 2.7 gal/hour (10.2 l/hour) |
|---|---|
| Belt power (max) | 26.14 hp (19.5 kW) |
| Description | Tractor fuel 4-speed 2WDJuly 16 - 30, 1948Link: Nebraska Tractor Test 399 file / Drawbar performance / Gear 2 used for power test. / Gear 1 used for pull test. |
| Max power | 24.31 hp (18.1 kW) |
| Max pull | 3,423 lbs (1552 kg) |
Nebraska Tractor Test 440
| Belt fuel use (max) | 3.2 gal/hour (12.1 l/hour) |
|---|---|
| Belt power (max) | 34.63 hp (25.8 kW) |
| Description | Gasoline 4-speed 2WDMay 17 - June 1, 1950Link: Nebraska Tractor Test 440 file / Drawbar performance / Gear 3 used for power test. / Gear 1 used for pull test. |
| Max power | 30.23 hp (22.5 kW) |
| Max pull | 4,304 lbs (1952 kg) |
Tractor Tests
| Description | NTTL 399: tractor fuel 4-speed 2WD / NTTL 440: gasoline 4-speed 2WD |
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WD Serial Number Location
| Description | The WD serial number is stamped into the rear of the transmission case on the left side. |
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WD Serial Numbers
| 1948 | 7 |
|---|---|
| 1949 | 9250 |
| 1950 | 35445 |
| 1951 | 72328 |
| 1952 | 105182 |
| 1953 | 131243 |
| Description | FAQ: How to read a serial number table. |