Hart-Parr 28-44
The Hart-Parr 28-44 is a tractor produced by Hart Parr. It is equipped with a 443 ci 7.3 L engine. Transmission: 3 forward and 1 reverse. Operating weight: 5565 to 6415 pounds.
Fuel & Capacities
34 gal
128.7 L
Transmission
3 forward and 1 reverse
Operating Weight
6415 lbs
2909 kg
Overview
 | 1930 - 1937
Standard-tread tractor |
|---|
Production | |
|---|---|
Manufacturer | Hart-Parr (a part of Oliver) |
Standard-tread tractor | |
Built in Charles City, Iowa, USA | |
Hart-Parr 28-44 Engine | |
|---|---|
Hart-Parr 7.3L 4-cyl kerosene | |
Fuel tank | 34 gal
128.7 L |
Engine details ...  | |
Hart-Parr 28-44 Transmission | |
|---|---|
3-speed gear | |
Transmission details ...  |
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 |
Performance test details ...  | |
Mechanical | |
|---|---|
Two-wheel drive | |
Manual steering | |
Open operator station. |
Power Take-off (PTO) | |
|---|---|
Rear PTO Type | 540 |
Dimensions & Tires | |
|---|---|
Wheelbase | 80 inches
203 cm |
Weight | 5565 to 6415 pounds |
Front tire | 29x6 |
Rear tire | 46x12 (steel) |
Full dimensions and tires ...  | |
Belt Pulley | |
|---|---|
Diameter | 16.75 inches
42 cm |
Width | 8.25 inches
20 cm |
RPM | 596 |
Speed | 2600 ft/min
792.48 meters/min |
References | |
|---|---|
 | |
Oliver Hart-Parr Tractors published in 1930 |
Engine
Engine Detail — 443 ci / 7.3 L Kerosene
Manufacturer | Hart-Parr |
Fuel Type | Kerosene |
Configuration | 4-cylinder, liquid-cooled |
Displacement | 443 ci
7.3 L |
Bore/Stroke | 4.75x6.25 inches
121 x 159 mm |
Rated RPM | 1125 |
Coolant capacity | 42 qts
39.7 L |
Transmission
Transmission — 3 forward and 1 reverse gear
Type | gear |
Gears | 3 forward and 1 reverse |
 | |
Dimensions
Hart-Parr 28-44 Tires | |
|---|---|
Ag front | 29x6 (steel) |
Ag rear | 46x12 (steel) |
Dimensions | |
|---|---|
Wheelbase | 80 inches
203 cm |
Length | 125.75 inches
319 cm |
Width | 65 inches
165 cm |
Height (hood) | 59.5 inches
151 cm |
Shipping weight | 5565 lbs
2524 kg |
Operating weight | 6415 lbs
2909 kg |
Tests
Nebraska Tractor Test 183 | |
|---|---|
Kerosene 3-speed 2WD
October 13 - 27, 1930
Link: Nebraska Tractor Test 183 file | |
Belt power (max) | 49.04 hp
36.6 kW |
Belt fuel use (max) | 4.9 gal/hour
18.5 l/hour |
Drawbar performance | |
Max power | 34.21 hp
25.5 kW |
Gear 2 used for power test. | |
Max pull | 5,116 lbs
2320 kg |
Gear 1 used for pull test. | |
Photos
Hart-Parr 28-44
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Hart Parr Hart-Parr 28-44.
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
Hart Parr Hart-Parr 28-44 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Hart Parr Hart-Parr 28-44.
Converted Equivalents:
Horsepower (HP)0 hp
Kilowatts (kW)0 kW
Metric Horsepower (PS / CV)0 PS
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