Rock Island G2 15-25

The Rock Island G2 15-25 is a tractor produced by Rock Island. It is equipped with a 326 ci 5.3 L engine. Transmission: 2 forward and 1 reverse. Operating weight: 4,200 lbs 1905 kg.

Overview

	1929 - 1932 Standard-tread tractor

Production
Manufacturer	Rock Island
Standard-tread tractor
Built in Rock Island, Illinois, USA

Rock Island G2 15-25 Engine
Waukesha 5.3L 4-cyl kerosene
Fuel tank	21 gal 79.5 L
Aux. fuel	3.5 gal 13.2 L
Engine details ...

Rock Island G2 15-25 Transmission
2-speed unsynchronized gear
Transmission details ...

Rock Island G2 15-25 Power
Drawbar (claimed)	15 hp 11.2 kW
Belt (claimed)	25 hp 18.6 kW
Drawbar (tested)	25.50 hp 19.0 kW
Belt (tested)	35.69 hp 26.6 kW
Performance test details ...

Mechanical
Two-wheel drive
Steering	manual
Open operator station.

Dimensions & Tires
Weight	4,200 lbs 1905 kg
Full dimensions and tires ...

Links
G2 restoration site:
G2 at RIPC site:

Engine

Engine Detail — 326 ci / 5.3 L Kerosene

Manufacturer	Waukesha
Fuel Type	Kerosene
Configuration	4-cylinder, liquid-cooled
Displacement	326 ci 5.3 L
Bore/Stroke	4.25x5.75 inches 108 x 146 mm
Rated RPM	1100

Transmission

Transmission — 2 forward and 1 reverse unsynchronized gear

Type	unsynchronized gear
Gears	2 forward and 1 reverse

Dimensions

Rock Island G2 15-25 Tires

Dimensions
Weight	4,200 lbs 1905 kg

Tests

Tractor Tests
NTTL 157: kerosene 2-speed 2WD
NTTL 158: gasoline 2-speed 2WD

Nebraska Tractor Test 157
Kerosene 2-speed 2WD April 24 - May 3, 1929 Link: Nebraska Tractor Test 157 file
Belt power (max)	29.00 hp 21.6 kW
Belt fuel use (max)	3.6 gal/hour 13.6 l/hour
Drawbar performance
Max power	22.08 hp 16.5 kW
Max pull	2,880 lbs 1306 kg

Nebraska Tractor Test 158
Gasoline 2-speed 2WD May 4 - 8, 1929 Link: Nebraska Tractor Test 158 file
Belt power (max)	35.69 hp 26.6 kW
Belt fuel use (max)	3.9 gal/hour 14.8 l/hour
Drawbar performance
Max power	25.50 hp 19.0 kW
Max pull	3,549 lbs 1609 kg

Photos

Rock Island G2 15-25