Caterpillar RD4
The Caterpillar RD4 is a tractor produced by Caterpillar. It is equipped with a 312.1 ci 5.1 L engine. The rated power output is 39.82 hp 29.7 kW. Transmission: 5 forward and 1 reverse. Drive type: crawler.
Engine Power
39.82 hp
29.7 kW
Drive & Traction
crawler
Fuel & Capacities
Diesel
Transmission
5 forward and 1 reverse
Caterpillar RD4 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
 | 1935 - 1940
Agricultural Crawler tractor |
|---|---|
1935 - 1940 | |
Agricultural Crawler tractor | |
Production | |
|---|---|
Manufacturer | Caterpillar |
Agricultural Crawler tractor | |
Built in Peoria, Illinois, USA | |
Caterpillar RD4 Engine | |
|---|---|
Caterpillar 5.1L 4-cyl diesel | |
Engine details ...  |
Caterpillar RD4 Transmission | |
|---|---|
5-speed gear | |
Transmission details ...  |
Caterpillar RD4 Power | |
|---|---|
Drawbar (tested) | 35.06 hp
26.1 kW |
Belt (tested) | 39.82 hp
29.7 kW |
Performance test details ...  | |
Mechanical | |
|---|---|
Drive | crawler |
Open operator station. | |
Dimensions & Tracks | |
|---|---|
Tracks | |
Full dimensions and tracks ...  |
Engine
Engine Detail — 312.1 ci / 5.1 L Diesel
Manufacturer | Caterpillar |
Fuel Type | Diesel |
Configuration | 4-cylinder, liquid-cooled |
Displacement | 312.1 ci
5.1 L |
Bore/Stroke | 4.25x5.50 inches
108 x 140 mm |
Rated RPM | 1400 |
Transmission
Transmission — 5 forward and 1 reverse gear
Type | gear |
Gears | 5 forward and 1 reverse |
Clutch | dry disc |
 | |
Dimensions
Caterpillar RD4 Tracks |
|---|
Dimensions | |
|---|---|
Gauge | 44 inches
111 cm |
Gauge | 60 inches
152 cm |
Tests
Nebraska Tractor Test 273 | |
|---|---|
Diesel 5-speed crawler
October 14 - 28, 1936
Link: Nebraska Tractor Test 273 file | |
Belt power (max) | 39.82 hp
29.7 kW |
Belt fuel use (max) | 2.9 gal/hour
11.0 l/hour |
Drawbar performance | |
Max power | 35.06 hp
26.1 kW |
Gear 2 used for power test. | |
Max pull | 7852 lbs
3561 kg |
Gear 1 used for pull test. | |
Photos
Caterpillar RD4
1937 Caterpillar model RD4.
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