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Tractor · 1929Unverified

John Deere GPWT

Name: John Deere GPWT
Brand: John Deere

John Deere GPWT — Two-Cylinder Letter Series · 10 hp. Reference specifications; pending source verification.

The John Deere GPWT is a tractor with a rated power of 10 hp, positioning it at the lighter end of its class. It was manufactured from 1929 to 1933. The tractor features a 2-cylinder liquid-cooled engine paired with two-wheel drive and a 3-speed gearbox. It is suitable for operations on land areas of up to 200 acres.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

10 hp

Catalogue coverage

Variants represented

Richest spec table

64 rows

Recorded power

10 hp

Transmissions

3-speed unsynchronized gear

Production years

1929-1933

Verified variants

1 linked source document displayed

Hover a source tag to verify

Overview

ManufacturerJohn DeereReference

Row-Crop tractorReference

Built in Waterloo, Iowa, USAReference

The John Deere GP Wide Tread (GPWT) was tricycle-front version of the model GP tractor, with a wide rear axle. There were 203 model GPWT tractors converted to a narrower, 68-inch, rear tread for use in potato fields of the US Northeast. The last 443 GPWT tractors were built with "overhead steering", with a shaft running over the top of the hood in a style similar to the later Model A tractor. The first overhead-steer GPWT was serial number was serial number 404810.Reference

Two-wheel driveReference

SteeringmanualReference

Open operator station with steel pan seat.Reference

Variants

GP-Ppotato, with 68-inch treadReference

Engine

John Deere 5.1L 2-cyl keroseneReference

John Deere 5.6L 2-cyl keroseneReference

Fuel tank60.6 LReference

Aux. fuel7.6 LReference

Drawbar (claimed)7.5 kWReference

Belt (claimed)14.9 kWReference

Plows2 (14-inch)Reference

John DeereReference

keroseneReference

2-cylinderReference

liquid-cooledReference

Original engine, used until 1930. Water-injection system was used to prevent detonation ("knocking") with low quality fuels. All GP-P tractors used the 5.75-inch bore engine.Reference

Displacement5.1 LReference

Bore/Stroke146 x 152 mmReference

Air cleaneroil bathReference

Rated RPM900Reference

Coolant capacity34.1 LReference

Introduced at S/N 402040 in July of 1930. The new engine had a larger bore with lower compression. It had slightly more power with better fuel economy. The lower compression eliminated the pre-ignition problem when using low-quality fuel, so the water-injection system was eliminated.Reference

Displacement5.6 LReference

Bore/Stroke152 x 152 mmReference

Rated RPM950Reference

Transmission

3-speed unsynchronized gearReference

TransmissionJohn DeereReference

Typeunsynchronized gearReference

Gears3 forward and 1 reverseReference

Clutchdry discReference

PTO & Hydraulics

Rear PTO Type520Reference

Dimensions

Wheelbase199 cmReference

Front tire24x6Reference

Rear tire44x10Reference

Ag front24x6 (steel)Reference

Ag front24x4 (GP-P)Reference

Ag rear44x10 (steel)Reference

Ag rear44x8 (GP-P)Reference

Length298 cmReference

GP-P Length300 cmReference

Width217 cmReference

GP-P Width193 cmReference

Height (hood)147 cmReference

Rear axle63 mmReference

Rear tread193 cmReference

Rear tread172 cmReference

GPWT Serial Number Location

Below gear shift leverReference

GPWT Serial Numbers

1929400000Reference

1930400936Reference

1931402741Reference

1932404770Reference

1933405110Reference

Final405254Reference

19305000 (GP-P)Reference

Final5202 (GP-P)Reference

FAQ: How to read a serial number table.Reference

Capacities

Diameter33 cmReference

Width16 cmReference

RPM950Reference

Speed975.36 meters/minReference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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