Hart-Parr 40
The Hart-Parr 40 is a tractor produced by Hart Parr. It is equipped with a 617.7 ci 10.1 L engine. The rated power output is 46.40 hp 34.6 kW. Transmission: 2 forward and 1 reverse. Operating weight: 7500 lbs 3402 kg.
Engine Power
46.40 hp
34.6 kW
Fuel & Capacities
Gasoline
Transmission
2 forward and 1 reverse
Operating Weight
7500 lbs
3402 kg
Hart Parr Hart-Parr 40 Serial Number & Year Decoder
Find the exact manufacture year of your tractor by checking your chassis serial number below.
Where to Find the Serial NumberThe serial number plate is commonly located on the front frame, tractor transmission housing (right side), or instrument panel badge.
Overview
 | 1923 - 1927
Standard-tread tractor |
|---|---|
1923 - 1927 | |
Standard-tread tractor | |
Production | |
|---|---|
Manufacturer | Hart-Parr |
Standard-tread tractor | |
Built in Charles City, Iowa, USA | |
Original price was $2,250 in 1927 | |
Hart-Parr 40 Engine | |
|---|---|
Hart-Parr 10.1L 4-cyl gasoline | |
Engine details ...  |
Hart-Parr 40 Transmission | |
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2-speed gear | |
Transmission details ...  |
Hart-Parr 40 Power | |
|---|---|
Drawbar (claimed) | 22 hp
16.4 kW |
Belt (claimed) | 40 hp
29.8 kW |
Drawbar (tested) | 28.23 hp
21.1 kW |
Belt (tested) | 46.40 hp
34.6 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Two-wheel drive | |
Manual steering | |
Open operator station. |
Dimensions & Tires | |
|---|---|
Weight | 7500 lbs
3402 kg |
Front tire | 28x5 |
Rear tire | 52x13 |
Full dimensions and tires ...  | |
Belt Pulley | |
|---|---|
Diameter | 14 inches
35 cm |
Width | 9 inches
22 cm |
RPM | 800 |
Speed | 2750 ft/min
838.20 meters/min |
Engine
Engine Detail — 617.7 ci / 10.1 L Gasoline
Manufacturer | Hart-Parr |
Fuel Type | Gasoline |
Configuration | 4-cylinder, liquid-cooled, 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. |
Displacement | 617.7 ci
10.1 L |
Bore/Stroke | 5.50x6.50 inches
140 x 165 mm |
Rated RPM | 800 |
Transmission
Transmission — 2 forward and 1 reverse gear
Type | gear |
Gears | 2 forward and 1 reverse |
Clutch | mechanical contracting band |
 | |
Dimensions
Hart-Parr 40 Tires | |
|---|---|
Ag front | 28x5 (steel) |
Ag rear | 52x13 (steel) |
Dimensions | |
|---|---|
Length | 140 inches
355 cm |
Width | 96 inches
243 cm |
Height | 67 inches
170 cm |
Weight | 7500 lbs
3402 kg |
Tests
Nebraska Tractor Test 97 | |
|---|---|
Kerosene 2-speed 2WD
July 10 - 19, 1923
Link: Nebraska Tractor Test 97 file | |
Belt power (max) | 46.40 hp
34.6 kW |
Belt fuel use (max) | 6.3 gal/hour
23.8 l/hour |
Drawbar performance | |
Max power | 28.23 hp
21.1 kW |
Max pull | 4830 lbs
2190 kg |
Photos
1923 Hart-Parr model 22-40.
1926 Hart-Parr model 22-40.
1926 Hart-Parr model 22-40.
close-up of the Hart-Parr model 22-40 engine.
Hart-Parr model 22-40 tractor.
Related models
Hart-Parr 20-40
- Power:
- 44.4
- Production years:
- 1912 - 1914
Hart-Parr Steel King
- Power:
- 44.4
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- 1916 - 1916
Hart-Parr 28-44
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- 48.9
- Production years:
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Hart-Parr 22-45
- Power:
- 50
- Production years:
- 1903 - 1911
Hart-Parr 18-36
- Power:
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- Production years:
- 1926 - 1930