Original engine, used until 1931. Water-injection system was used to prevent detonation ("knocking") with low quality fuels.
John Deere 5.6L 2-cyl kerosene
Bore × stroke
6 in × 6 in
Rated speed
950 rpm
Cooling
liquid-cooled
Notes
The new engine was introuded in 1931 on GP serial number 224100. It had lower compression but with a quarter-inch larger bore, producing 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.
Transmissions
Transmissions for the John Deere GP
3-speed unsynchronized gearunsynchronized gear
3F / 1R
Weight
Weight specifications
Weight
3,600 lb unspecified
Dimensions
Dimensions specifications
Wheelbase
no record
Length
112 in
Height
55.5 in
Capacities
Capacities specifications
Fuel tank
16 gal
Auxiliary fuel
2 gal
Hydraulics
Hydraulics specifications
Pump flow
no record
Hitch
Hitch specifications
Rear lift capacity
no record
Chassis
Chassis specifications
Drive
2WD
Steering
Manual steering
Cab
Open operator station
Tires
Tires specifications
Front
24x6
Rear
42.75x10
Production
Production specifications
Total built
30,535
Price new
$1,200 (1935)
Factories
Waterloo, Iowa, USA
Built by
John Deere
Variants
GPWT wide-tread
GPO orchard
GP-P potato
Serial numbers
Below gear shift lever
First serial number by year
Year
First serial
1928
200211
1929
201336
1930
212038
1931
223803
1932
228666
1933
229051
1934
229216
1935
230514
Final
230745
1931
15000 (GP-O)
1932
15226 (GP-O)
1933
15387 (GP-O)
1934
15412 (GP-O)
1935
15589 (GP-O)
Final
15732 (GP-O)
1930
5000-5202 (GP-P)
Literature
Tractors 1918-1976 John Deere*
Quality Equipment for Your Farming Operations John Deere, 1929
General Purpose Tractor John Deere, 1930
General Purpose Two-Cylinder Tractor John Deere, 1931