| Manufacturer |
Hart-Parr |
| Price |
- |
| Model |
28-44 |
| Equipment Type |
Standard-Tread Tractors |
| Factory |
Charles City, Iowa, USA |
NEBRASKA TRACTOR TEST 183
| Description |
Kerosene 3-speed 2WD/October 13 - 27, 1930/Link: Nebraska Tractor Test 183 file/Drawbar performance/Gear 2 used for power test./Gear 1 used for pull test. |
| Belt power (max) |
49.04 hp/36.6 kW |
| Belt fuel use (max) |
4.9 gal/hour/18.5 l/hour |
| Max power |
34.21 hp/25.5 kW |
| Max pull |
5,116 lbs/2320 kg |
HART-PARR 28-44 POWER
| Drawbar (claimed) |
22 hp/16.4 kW |
| Belt (claimed) |
44 hp/32.8 kW |
| Plows |
3-5 |
| Drawbar (tested) |
34.21 hp/25.5 kW |
| Belt (tested) |
49.04 hp/36.6 kW |
ENGINE DETAIL
The Hart-Parr 28-44 features a 4-cylinder kerosene engine with a displacement of 443 ci (7.3 L) that is well-suited for delivering substantial torque at low RPMs (rated at 1125). The bore and stroke dimensions (4.75x6.25 inches) allow for a strong stroke length which enhances power in heavy-duty applications, making it ideal for plowing and other agricultural tasks. However, the reliance on kerosene may pose challenges in fuel availability and operational efficiency compared to diesel engines, particularly in rural settings.
| Description |
Hart-Parr/kerosene/4-cylinder/liquid-cooled |
| Displacement |
443 ci/7.3 L |
| Bore/Stroke |
4.75x6.25 inches/121 x 159 mm |
| Rated RPM |
1125 |
HART-PARR 28-44 ENGINE
The Hart-Parr 28-44 tractor is powered by a 7.3L 4-cylinder kerosene engine, which offers high torque output beneficial for heavy-duty applications like plowing and tilling. Its kerosene fuel system allows for operating efficiency, although it may present challenges in cold weather starts compared to diesel engines. Ideal for large farming operations, this tractor combines robust power with fuel flexibility, although its weight and size may limit maneuverability in tighter fields.
| Description |
Hart-Parr 7.3L 4-cyl kerosene |
TRANSMISSION
The Hart-Parr 28-44 tractor features a simple gear transmission system with 3 forward and 1 reverse gear, allowing for straightforward operation in low-to-moderate terrain. Its lack of multiple forward gears may limit versatility in speed adjustments, making it ideally suited for task-oriented activities like plowing or hauling. Additionally, the gear type design can facilitate easy maintenance, though operators may need to adjust their driving style to accommodate the limited gearing options.
| Type |
gear |
| Gears |
3 forward and 1 reverse |
MECHANICAL
The Hart-Parr 28-44 features a 4x2 drivetrain, making it more suitable for flat terrains and less agile on slopes compared to 4WD models. Manual steering may require more effort during operation, especially in tight turns, which could affect operator comfort and efficiency. The 3-speed gear transmission offers basic gear selection, suitable for straightforward tasks but may limit versatility in varied terrain compared to more advanced multi-speed transmissions.
| Chassis |
4x2 2WD |
| Steering |
manual |
| Cab |
Open operator station. |
| Transmission |
3-speed gear |
DIMENSIONS
| Operating weight |
6,415 lbs/2909 kg |
DIMENSIONS & TIRES
The Hart-Parr 28-44 tractor, with a weight of 6,415 lbs (2,909 kg), offers stability and traction for heavy-duty agricultural tasks. Its robust build is advantageous for grounds requiring a high drawbar pull, but the weight could hinder mobility on softer terrains. Operators should consider soil conditions and potential compaction impacts when deploying this tractor for fieldwork.
28-44 SERIAL NUMBERS
| 1930 |
500001 |
| 1931 |
503599 |
| 1932 |
506185 |
| 1933 |
506212 |
| 1934 |
506255 |
| 1935 |
506401 |
| 1936 |
507176 |
| 1937 |
508016 |
| Final |
508917 |
