Caterpillar RD4 Specs ( 1935-1940 )
Overview
The Caterpillar RD4 is an agricultural crawler tractor manufactured in Peoria, Illinois, between 1935 and 1940. It features a 5.1L 4-cylinder liquid-cooled diesel engine and a 5-speed gear transmission with a dry disc clutch. Performance testing recorded a maximum belt power of 39.82 hp and a maximum drawbar pull of 7,852 lbs.
Ideal Applications
Tested Power and Efficiency:
Nebraska Tractor Test 273 recorded a maximum belt power of 39.82 hp with a corresponding fuel consumption of 2.9 gallons per hour.
Mechanical and Drive Configuration:
The RD4 is built with a crawler drive system and a gear transmission providing five forward speeds and one reverse speed.
Chassis and Track Dimensions:
This model features track-based propulsion and was produced with gauge options of either 44 inches or 60 inches.
Production
| Description | Agricultural Crawler tractor / Built in Peoria, Illinois, USA |
|---|---|
| Manufacturer | Caterpillar |
Engine
| Engine type | Caterpillar 5.1L 4-cyl diesel |
|---|---|
| Bore/Stroke | 4.25x5.50 inches (108 x 140 mm) |
| Description | Caterpillar / diesel / 4-cylinder / liquid-cooled |
| Displacement | 312.1 ci (5.1 L) |
| Rated RPM | 1400 |
| Belt (tested) | 39.82 hp (29.7 kW) |
| Drawbar (tested) | 35.06 hp (26.1 kW) |
Transmission
| Clutch | dry disc |
|---|---|
| Gears | 5 forward and 1 reverse |
| Transmission type | 5-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Drive | crawler |
Dimensions & Tires
| Gauge | 44 inches (111 cm) / 60 inches (152 cm) |
|---|
Dimensions & Tracks
| Description | Tracks |
|---|
Nebraska Tractor Test 273
| Belt fuel use (max) | 2.9 gal/hour (11.0 l/hour) |
|---|---|
| Belt power (max) | 39.82 hp (29.7 kW) |
| Description | Diesel 5-speed crawlerOctober 14 - 28, 1936Link: Nebraska Tractor Test 273 file / Drawbar performance / Gear 2 used for power test. / Gear 1 used for pull test. |
| Max power | 35.06 hp (26.1 kW) |
| Max pull | 7852 lbs (3561 kg) |
RD4 Serial Numbers
| 1936 | 4G1 |
|---|---|
| 1937 | 4G3663 |
| 1938 | 4G8858 |
| 1939 | 4G9912 |
| Description | FAQ: How to read a serial number table. |