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Allis Chalmers WD

Allis Chalmers WD tractor
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The Allis Chalmers WD is a row-crop tractor produced from 1948 to 1953 by Allis Chalmers in West Allis, Wisconsin, USA. It 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, while a hand-operated wet clutch allowed the PTO to operate while the tractor was slowed or stopped. It was powered by a 3.3L 4-cylinder liquid-cooled vertical I-head engine available in tractor fuel and gasoline versions. The tractor had a 4-speed non-synchronized gear transmission with 4 forward and 1 reverse gears. It had a drawbar power of 19 hp claimed and 30.23 hp tested, with a PTO power of 26 hp claimed. The WD had two-wheel drive, manual worm and horizontal sector steering, and manual external compression band type brakes. It had an open operator station and a single hitch point rear tractor hitch. The tractor's dimensions include a wheelbase of 88.1 inches, length of 127 inches, height of 81.5 inches, and operating weight of 3500 lbs. It used 5.50-16 front tires and 11-28 or 12-28 rear tires. The electrical system had a positive ground, Delco generator charging system, and a 6-volt battery.
Allis Chalmers WDtractorspecificationsenginetransmissionpowerdimensionshydraulics19481953row-crop tractor
Power28 hp[P]
Founded1948 - 1953
ModelWD

Technical Specifications

Detailed specifications and technical data for Allis Chalmers WD

Power

Belt (tested):34.63 hp (25.8 kW)
PTO (claimed):26 hp (19.4 kW)
Drawbar (tested):30.23 hp (22.5 kW)
Drawbar (claimed):19 hp (14.2 kW)

Engine

Starter:electric, hand crank
Details 1:Allis Chalmers tractor fuel 4-cylinder 8-valve liquid-cooled vertical I-head
Details 2: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.
Rated RPM:1400
Bore/Stroke:4.00x4.00 inches (102 x 102 mm)
Compression:4.5:1
Displacement:201 ci (3.3 L)
Firing order:1-2-4-3
Starter volts:6
Engine options:Allis Chalmers 3.3L 4-cyl tractor fuel, Allis-Chalmers 3.3L 4-cyl gasoline
Coolant capacity:14 qts (13.2 L)
Starter (gasoline):electric, hand crank
Rated RPM (gasoline):1400
Compression (gasoline):5.75:1
Firing order (gasoline):1-2-4-3
Starter volts (gasoline):6

Capacity

Fuel:15 gal (56.8 L)
Hydraulic system:1.25 gal (4.7 L)

Electrical

Ground:positive
Battery volts:6
Charging system:Delco generator

Hydraulics

Type:open center
Valves:1 Optional
Capacity:1.25 gal (4.7 L)
Pressure:1200 psi (82.7 bar)

Mechanical

Drive:Two-wheel drive
Brakes:Manual external compression band type brakes
Steering:manual worm and horizontal sector
Operator station:Open operator station

Production

Type:Row-Crop tractor
Notes: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.
Built in:West Allis, Wisconsin, USA
Total built:146,125
Manufacturer:Allis Chalmers
Original price:$1,830
Years produced:1948 - 1953

Transmission

Type:non-synchronized gear
Gears:4 forward and 1 reverse

Tractor hitch

Rear Type:Single Hitch Point

WD Serial Numbers

1948:7
1949:9250
1950:35445
1951:72328
1952:105182
1953:131243

Dimensions & Tires

Height:81.5 inches (207 cm)
Length:127 inches (322 cm)
Rear tire:11-28, 12-28
Wheelbase:88.1 inches (223 cm)
Front tire:5.50-16
Rear tread:55.6 to 90.1 inches (141 to 228 cm)
Ballasted weight:5050 lbs (2290 kg)
Operating weight:3500 lbs (1587 kg)

Power Take-off (PTO)

Live PTO:optional
Rear PTO:transmission
Rear PTO Type:540

WD Serial Number Location

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

Related Models

Allis Chalmers WD45

Model:WD45

Allis Chalmers WC

Model:WC