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Years in Production / 1934–1942
Caterpillar
R2
Explore the specifications, hardware, and original references for the Caterpillar R2.
36hp
Engine estimate · from belt
Tracks
Drive
1934–1942
Production years
Caterpillar
Manufacturer
R2 / 01
At a glance
Production
Agricultural Crawler tractor
Built in Peoria, Illinois, USA
- Manufacturer
- Caterpillar
- Total Built
- 2418 (total)
- Total Built
- 835E
- Total Built
- 11854J
- Total Built
- 11506J
Mechanical
Open operator station.
- Drive
- crawler
Belt Pulley
- Diameter
- 10.5 inches26 cm
- Width
- 6.5 inches16 cm
- Rpm
- 950
R2 / 02
Under the hood
Engine Detail (Option 1)
Caterpillar
gasoline
4-cylinder
liquid-cooled
Original engine, used on the 5E version.
- Displacement
- 251 ci4.1 L
- Bore Stroke
- 4.00x5.00 inches102 x 127 mm
- Air Cleaner
- oil bath
- Rated Rpm
- 950
- Fuel Type
- gasoline
- Cylinders
- 4
- Cooling
- liquid-cooled
Engine Detail (Option 2)
Caterpillar 3400G
gasoline
4-cylinder
liquid-cooled
The 3400G was used on the 4J and 6J versions, which were most R-2 tractors built.
- Displacement
- 221 ci3.6 L
- Bore Stroke
- 3.75x5.00 inches95 x 127 mm
- Air Cleaner
- oil bath
- Rated Rpm
- 1525
- Oil Capacity
- 12 qts11.4 L
- Coolant Capacity
- 28 qts26.5 L
- Fuel Type
- gasoline
- Cylinders
- 4
- Cooling
- liquid-cooled
Engine Options
Caterpillar 4.1L 4-cyl gasoline
Caterpillar 3.6L 4-cyl gasoline
- Fuel Tank
- 20 gal75.7 L
R2 / 03
Gears & controls
Transmission (Option 1)
The three-speed was used on the 5E version, built in limited quantities until 1938.
- Transmission Type
- gear
- Gears
- 3 forward and 1 reverse
Transmission (Option 2)
The five speed transmission was used on the R-2 4J and R-2 6J.
- Transmission Type
- gear
- Gears
- 5 forward and 1 reverse
- Oil Capacity
- 8 qts7.6 L
R2 / 04
Size. Stance. Footprint.
Tires And Tracks
13-inch tracks
- Weight
- 6350 lbs2880 kg
Tires And Tracks
- Width
- 13 inches33 cm
R2 / 05
Tests (NTTL)
Nebraska Tractor Test 225Nebraska test report ↗
4.1L gasoline 3-speed crawlerSeptember 24 - October 16, 1934
Drawbar performance
- Id
- 225
- Belt Power Max
- 32.47 hp24.2 kW
- Belt Fuel Use Max
- 3.7 gal/hour14.0 l/hour
- Max Power
- 27.15 hp20.2 kW
- Max Pull
- 5274 lbs2392 kg
Nebraska Tractor Test 320Nebraska test report ↗
3.6L gasoline 5-speed crawler1939
Drawbar performance
Gear 2 used for power test.
Gear 1 used for pull test.
- Id
- 320
- Belt Power Max
- 29.31 hp21.9 kW
- Belt Fuel Use Max
- 3.6 gal/hour13.6 l/hour
- Max Power
- 23.46 hp17.5 kW
- Max Pull
- 5676 lbs2574 kg