Allis-Chalmers WD Overview
For owners, buyers, restorers, and parts searchers, the Allis Chalmers Wd is most useful when its serial range, equipment, manuals, and parts sources are checked together. Allis Chalmers Wd: The Allis-Chalmers WD was produced from 1948 through 1953. A 201 ci (3.3 L) four-cylinder engine drives its straightforward, no-frills design.
For buyers and restorers, the WD centers on a rear PTO, a simple hitch arrangement, an open-center hydraulic system, and a compact weight profile.
Manuals, test reports, and catalogs from Jensales, Bundy Bear's Shed, AGCO Heritage, and the Nebraska test provide authoritative context for operation, maintenance, and parts matching. Check the actual serial range and configuration before ordering service parts.
Allis-Chalmers WD Quick Answers
- Production yearsThe Allis-Chalmers WD was produced from 1948 through 1953.
- PowerPTO power published at 26 hp (19.4 kW); drawbar power tested at 30.23 hp (22.5 kW); match the engine/transmission configuration before treating those as model-wide figures.
- EngineEngine displacement is 201 ci (3.3 L).
- PTO and hitchRear PTO is 540; hitch is Category Single Hitch Point.
- Service capacityHydraulic system capacity is 1.25 gal (4.7 L); coolant capacity is 14 qts (13.2 L).
Engine and Power
Engine: A 201 ci (3.3 L) four-cylinder engine powers the WD. Bore/stroke is 4.00x4.00 inches; compression varies by variant, with a gasoline version shown at a higher compression in some years. Electrical starting is 6-volt.
Engine option 1
Allis Chalmers / tractor fuel / 4-cylinder 8-valve / liquid-cooled vertical I-head
| Displacement | 201 ci 3.3 L |
|---|---|
| Bore Stroke | 4.00x4.00 inches 102 x 102 mm |
| Compression | 4.5:1 |
| Rated Rpm | 1400 |
| Firing Order | 1-2-4-3 |
| Starter | electric |
| Starter Volts | 6 |
| Coolant Capacity | 14 qts 13.2 L |
Gasoline engine
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 |
|---|---|
| Bore Stroke | 4.00x4.00 inches 102 x 102 mm |
| Compression | 5.75:1 |
| Rated Rpm | 1400 |
| Firing Order | 1-2-4-3 |
| Starter | electric |
| Starter Volts | 6 |
Manufacturer
Manufacture years
Tested drawbar
Transmission
Transmission: Non-synchronized four-speed gearbox with 4 forward and 1 reverse. The clutch, PTO, and gearbox arrangement influence service and parts decisions.
4-speed non-synchronized gear
| Type | non-synchronized gear |
|---|---|
| Gears | 4 forward and 1 reverse |
PTO and Hitch
PTO and hitch: Rear PTO is 540; rear hitch is a single hitch point.
Rear PTO
Rear PTO type
Rear hitch
Hydraulics
Hydraulics: Open-center hydraulic system, 1200 psi, 1.25 gal capacity. One valve is optional depending on configuration.
Type
Capacity
Pressure
Valves
Fluids, Battery, and Service Facts
Maintenance: Published capacities include hydraulic system 1.25 gal and coolant capacity 14 qts; battery is 6V. Fluid types, filters, belts, and clutch/PTO parts require confirmation from a parts catalog or manual before ordering.
Fuel tank
Hydraulic system
Battery volts
Tires and Dimensions
Tire and dimension values can vary by wheel, axle, and configuration.
Configuration-specific values are split out where the same model has documented differences by engine, transmission, or equipment.
Wheelbase
Weight
Length
Height
Front tire
Rear tire
Ag front
Ag rear
- 11-28
- 12-28
Electrical
Electrical rows are included when documented.
Ground
Charging system
Battery volts
Serial Number Lookup
Serials: Serial ranges help narrow by model year; factory prefixes and regional differences require documentation before applying year tables beyond the stated range.
1948
1949
1950
1951
1952
1953
Manuals and Documents
The documents below add manual, parts, and test context for the Allis-Chalmers WD. They are useful for controls, service categories, parts matching, and tested-performance details that do not fit into short spec rows.
Match coverage carefully before relying on a document for service decisions, especially when one manual, catalog, or report covers several models, fuel types, transmissions, or tractor variants.
- Allis Chalmers WD Tractor Operators ManualWD operator manual for Allis-Chalmers WD (1948-1953); covers operation, lubrication, and capacities such as radiator coolant and engine oil capacity.Open source
- Allis-Chalmers WD Operators ManualWD Operators Manual (reprint) covering operation, maintenance and parts references for WD; includes sections on fuel, lubrication, and cooling system.Open source
- Allis-Chalmers WD WD45 Parts Catalog (PDF)Allis-Chalmers WD/WD45/WD45 Diesel tractor parts catalog; exploded views and part numbers for WD family, including WD and WD45 diagrams.Open source
- Test 399: Allis-Chalmers "WD"Nebraska Tractor Test Laboratory report for Allis-Chalmers WD; official OECD-style test document from 1948.Open source
- Allis-Chalmers Heritage CatalogAGCO Allis-Chalmers heritage catalog; manufacturer documentation covering model WD (1948-1953) and related information for parts, maintenance references, and identification.Open source
Parts Checks Before Ordering
Do not order Allis-Chalmers WD parts from the model name alone. Match the part to the tractor's model code, serial range, engine, transmission, and PTO setup before selecting service parts.
Filters, fluids, belts, electrical parts, clutch and PTO parts, and hydraulic components can vary by configuration. Exact part numbers require a parts catalog, manual, or trusted supplier source before they become recommendations.
Accuracy Note
Tractor specifications can vary by year, region, factory configuration, installed equipment, and later repairs. Match serial range, engine, transmission, PTO setup, and model code before ordering parts or doing service work.