Allis-Chalmers Model ED40

Allis-Chalmers Model ED40

A restored ED40 at the Darley Dale Festival of Transport 2009
Model history
Model introduced	1960
Model discontinued	1964
Model status	Discontinued
Engine Specification
Engine make	Standard Motor Co
Fuel type	diesel
Power hp	41
Power kW	31
Displacement cu in /(litre)	137.89 cu in
No. of Cylinders	4
Cooling system	Water
Transmission Details
Transmission type	Unknown
Drive	2WD
Linkage Category	Unknown
Other info
Factories	Essendine, Lincolnshire, England
Plow rating	Unknown

The Allis-Chalmers ED-40 tractor was the last model made by the UK subsidiary of the American Allis-Chalmers Corporation before the plant at Essendine, Lincolnshire was closed. Introduced at the Smithfield Show, London in 1960, it retained all the features that rowcrop farmers required but in a manner that made it a universal farm tractor. Only diesel power was available from a four cylinder ohv engine of 137.89 cu.ins. with indirect injection. The engines were made by the Standard Motor Co of Coventry, England (the same engine as used in the earlier Coventry built Massey Ferguson 35 tractors) and produced 41 hp (31 kW).

Transmission was 8 speed through a single clutch with the option of the Allis-Chalmers half-shaft clutch to achieve 'live' power take-off. Converging three point linkage was powered by an engine mounted hydraulic pump giving hydraulic power whenever the engine was running regardless of transmission status. An hydraulic weight transfer system was built in to increase traction and a simple mechanical depth stop was provided on the earlier machines. Later machines, introduced mid 1963 and called 'Depthomatic' had a draught and position control system. Other modifications and options included improved gear ratios; a pick-up hitch; an increase in power through higher maximum revs and revised battery arrangement. An option on both models was the patent Allis Chalmers PAVT rear wheels (Power Adjusted Variable Track),a system adopted by other manufacturers after patents expired. Production ended in 1968 and quite a few are still in use on farms in 2009. A few ED40s were exported to the USA.

For brand history, see Allis-Chalmers.

Preservation

A Number of these tractors can be seen at UK steam rallies and tractor shows. These are a relatively light weight tractor facilitating transport behind a 4-wd or a van (light commercial).

known tractors in preservation

(please list details below)

• 7158 NU (photo above)

List of Preserved Allis-Chalmers ED40 tractors

Make + Model No.	Reg No. (if known)	Serial No.	Build-Date	Engine-Type/Make	Owner (if known)	Photo	Were seen/Featured in	Other info
Please add any tractor with known reg or serial no. with Photo if possible.
Create a page (link) for an individual tractor by linking the reg or serial number using reg number or serial number in the relevant column. Then once saved click the red link to start the new page and add info on that tractor.

See also

• List of Tractor Manufacturers
• Clubs Listing
  • Allis-Chalmers Owners Club
• Web Site Links

References / sources

• Farmer and Stockbreeder, 6 December 1960, page 127
• Farm Mechanisation, July 1963
• Operators handbook - Allis Chalmers Great Britain Ltd, 1960-68