Hart-Parr 12-24

The Hart-Parr 12-24 is a tractor produced by Hart Parr. It is equipped with a 337.6 ci 5.5 L engine. The rated power output is 26.97 hp 20.1 kW. Transmission: 3 forward and 1 reverse. Operating weight: 4440 lbs 2013 kg.

Overview

	1924 - 1930 Standard-tread tractor
1924 - 1930
Standard-tread tractor

Production
Manufacturer	Hart-Parr
Standard-tread tractor
Built in Charles City, Iowa, USA
Original price was $1,050 in 1930

Hart-Parr 12-24 Power
Drawbar (claimed)	12 hp 8.9 kW
Belt (claimed)	24 hp 17.9 kW
Drawbar (tested)	17.54 hp 13.1 kW
Belt (tested)	26.97 hp 20.1 kW
Performance test details ...

Mechanical
Two-wheel drive
Manual steering
Open operator station.

Dimensions & Tires
Weight	4440 lbs 2013 kg
Front tire	28x5
Rear tire	46x10
Full dimensions and tires ...

Engine

Engine options
Hart-Parr 5.1L 2-cyl gasoline
Hart-Parr 5.5L 2-cyl gasoline

Engine Detail — 308.9 ci / 5.1 L Gasoline

Manufacturer	Hart-Parr
Fuel Type	Gasoline
Configuration	2-cylinder, liquid-cooled
Displacement	308.9 ci 5.1 L
Bore/Stroke	5.50x6.50 inches 140 x 165 mm
Rated RPM	850

Engine Detail — 337.6 ci / 5.5 L Gasoline

Manufacturer	Hart-Parr
Fuel Type	Gasoline
Configuration	2-cylinder, liquid-cooled
Displacement	337.6 ci 5.5 L
Bore/Stroke	5.75x6.50 inches 146 x 165 mm
Rated RPM	850

Transmission

Transmission options
2-speed gear
3-speed gear

Transmission — 2 forward and 1 reverse gear

Type	gear
Gears	2 forward and 1 reverse

Transmission — 3 forward and 1 reverse gear

Type	gear
Gears	3 forward and 1 reverse

Dimensions

Hart-Parr 12-24 Tires
Ag front	28x5 (steel)
Ag rear	46x10 (steel)

Dimensions
Length	116 inches 294 cm
Width	66 inches 167 cm
Height	56 inches 142 cm
Weight	4440 lbs 2013 kg

Tests

Nebraska Tractor Test 107
309 kerosene 2WD October 14 - 23, 1924 Link: Nebraska Tractor Test 107 file
Belt power (max)	26.97 hp 20.1 kW
Drawbar performance
Max power	17.54 hp 13.1 kW
Gear 2 used for power test.
Max pull	3,054 lbs 1385 kg
Gear 1 used for pull test.

Photos

Hart-Parr 12-24