Caterpillar R3
The Caterpillar R3 is a tractor produced by Caterpillar. It is equipped with a 350 ci 5.7 L engine. Transmission: 3 forward and 1 reverse. Drive type: crawler.
Drive & Traction
crawler
Fuel & Capacities
Gasoline
Transmission
3 forward and 1 reverse
Overview
 | 1934 - 1935
Agricultural Crawler tractor |
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Production | |
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Manufacturer | Caterpillar |
Agricultural Crawler tractor | |
Built in Peoria, Illinois, USA | |
Total built | 60 |
The R3 was a special-order machine for the US Government, based on the Twenty-Eight. | |
Caterpillar R3 Engine | |
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Caterpillar 5.7L 4-cyl gasoline | |
Engine details ...  |
Caterpillar R3 Transmission | |
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3-speed gear | |
Transmission details ...  |
Caterpillar R3 Power | |
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Drawbar (tested) | 34.44 hp
25.7 kW |
Belt (tested) | 41.99 hp
31.3 kW |
Performance test details ...  | |
Mechanical | |
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Drive | crawler |
Open operator station. | |
Dimensions & Tracks | |
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Tracks | |
Full dimensions and tracks ...  |
Engine
Engine Detail — 350 ci / 5.7 L Gasoline
Manufacturer | Caterpillar |
Fuel Type | Gasoline |
Configuration | 4-cylinder, liquid-cooled |
Displacement | 350 ci
5.7 L |
Bore/Stroke | 4.50x5.50 inches
114 x 140 mm |
Fuel system | Ensign carburetor |
Air cleaner | oil bath |
Rated RPM | 1100 |
Transmission
Transmission — 3 forward and 1 reverse gear
Type | gear |
Gears | 3 forward and 1 reverse |
Clutch | dry disc |
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Dimensions
Caterpillar R3 Tracks |
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Dimensions |
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Tests
Nebraska Tractor Test 227 | |
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Gasoline 3-speed crawler
September 26 - October 15, 1934
Link: Nebraska Tractor Test 227 file | |
Belt power (max) | 41.99 hp
31.3 kW |
Belt fuel use (max) | 4.9 gal/hour
18.5 l/hour |
Drawbar performance | |
Max power | 34.44 hp
25.7 kW |
Gear 2 used for power test. | |
Max pull | 7,622 lbs
3457 kg |
Gear 1 used for pull test. | |
Photos
Caterpillar R3
Caterpillar R3
Caterpillar R3
Caterpillar R3 operator station and controls.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for Caterpillar R3.
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
Caterpillar R3 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for Caterpillar R3.
Converted Equivalents:
Horsepower (HP)0 hp
Kilowatts (kW)0 kW
Metric Horsepower (PS / CV)0 PS
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