Gray Tractor

Gray Tractor 18-36

The Gray Tractor 18-36 is a standard-tread tractor built by Gray Tractor in Minneapolis, Minnesota, USA from 1918 to 1921. It features a Waukesha 7.8L 4-cylinder liquid-cooled gasoline engine with a 2-speed gear transmission. The tractor delivers a claimed drawbar power of 18 hp and belt power of 36 hp, with tested drawbar and belt powers slightly higher and lower respectively. It has a 3x1 drum drive with manual steering and an open operator station. Dimensions include a 104.5 inch wheelbase, 174 inch length, 72.25 inch width, and 72 inch height, weighing 6200 lbs. Tires are 40x8 steel front and 54x54 steel rear. The serial number plate is located on the left side of the tractor on top of the transmission case.
Power36 hp[B]
Founded1918 - 1921
Model18-36

Technical Specifications

Detailed specifications and technical data for Gray Tractor 18-36

Power
Plows4
Belt (tested)32.20 hp (24.0 kW)
Belt (claimed)36 hp (26.8 kW)
Drawbar (tested)19.64 hp (14.6 kW)
Drawbar (claimed)18 hp (13.4 kW)
Tires
Rear tire54x54 steel
Front tire40x8 steel
Engine
Typegasoline
ModelWaukesha P
Coolingliquid-cooled inline
Cylinders4-cylinder
Rated RPM900
Bore/Stroke4.75x6.75 inches (121 x 171 mm)
Fuel systemcarburetor
Displacement478 ci (7.8 L)
Starter typehand-crank
Dimensions
Width72.25 inches (183 cm)
Height72 inches (182 cm)
Length174 inches (441 cm)
Weight6200 lbs (2812 kg)
Wheelbase104.5 inches (265 cm)
Mechanical
Drive3x1 drum drive
SteeringManual steering
Operator stationOpen operator station
Production
TypeStandard-tread tractor
Built inMinneapolis, Minnesota, USA
ManufacturerGray Tractor
Years produced1918 - 1921
Belt Pulley
Width8 inches (20 cm)
Diameter11 inches (27 cm)
Transmission
Typegear
Gears2 forward and 1 reverse