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Tractor · 1923Unverified

Hart-Parr 40

Hart-Parr 40 — Standard-tread tractor · 22 hp. Reference specifications; pending source verification.

The Hart-Parr 40 is a tractor with a rated power output of 22 hp, making it one of the more compact options in its class. Manufactured from 1923 to 1927, this model features a 4-cylinder petrol liquid-cooled engine. The engine drives through a 2-speed gearbox and two-wheel drive, with a listed weight of 3402 kg. Its intended application is for jobs involving approximately 200 acres.

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

Rated power
22 hp
Max power
21.1 kW
Weight
3402 kg

Catalogue coverage

Variants represented
2
Richest spec table
49 rows
Recorded power
22 hp
Recorded weight
3402 kg
Transmissions
2-speed gear
Production years
1923-1927
Verified variants
0

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

Hover a source tag to verify

Overview

ManufacturerHart-ParrReference
Standard-tread tractorReference
Built in Charles City, Iowa, USAReference
Original price was $2,250 in 1927Reference
Two-wheel driveReference
Manual steeringReference
Open operator station.Reference

Engine

Hart-Parr 10.1L 4-cyl gasolineReference
Drawbar (claimed)16.4 kWReference
Belt (claimed)29.8 kWReference
Drawbar (tested)21.1 kWReference
Belt (tested)34.6 kWReference
Hart-ParrReference
gasolineReference
4-cylinderReference
liquid-cooledReference
The Hart-Parr 22-40 used a pair of two-cylinder engine blocks from the 20C on a single crankshaft to create the four-cylinder engine. Early models used two carburetors while later models had a single carburetor to feed both blocks.Reference
Displacement10.1 LReference
Bore/Stroke140 x 165 mmReference
Rated RPM800Reference
Belt power (max)34.6 kWReference
Max power21.1 kWReference

Transmission

2-speed gearReference
TypegearReference
Gears2 forward and 1 reverseReference
Clutchmechanical contracting bandReference

Dimensions

Weight3402 kgReference
Front tire28x5Reference
Rear tire52x13Reference
Ag front28x5 (steel)Reference
Ag rear52x13 (steel)Reference
Length355 cmReference
Width243 cmReference
Height170 cmReference

40 Serial Numbers

192370001Reference
192470020Reference
192570095Reference
192670251Reference
192770491Reference
Final70500Reference
FAQ: How to read a serial number table.Reference

Capacities

Diameter35 cmReference
Width22 cmReference
RPM800Reference
Speed838.20 meters/minReference

Test results

Kerosene 2-speed 2WDJuly 10 - 19, 1923Link: Nebraska Tractor Test 97 fileReference
Belt fuel use (max)23.8 l/hourReference
Drawbar performanceReference
Max pull2190 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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