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Gibson I

Gibson I tractor
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The Gibson I is a row-crop tractor produced from 1948 to 1952 by Gibson in Longmont, Colorado, USA. It features a Hercules 3.9L 6-cylinder gasoline engine, a 4-speed gear transmission, and two-wheel drive with manual steering. The tractor has a live rear PTO with a 540 rpm type and is capable of pulling 2-3 plows. It has an open operator station and mechanical band brakes. The tractor weighs between 4000 to 4512 pounds operating weight and has a wheelbase of 94 inches. It was available in tricycle-front, adjustable wide-front, and standard front variants.
Gibson IGibson tractorrow-crop tractorHercules engine4-speed transmissiontractor specifications1948 tractor1952 tractor
Power40 hp[P]
Founded1948 - 1952
ModelI

Technical Specifications

Detailed specifications and technical data for Gibson I

Power

Plows:2-3
PTO (tested):36.82 hp (27.5 kW)
Belt (tested):41.03 hp (30.6 kW)
Drawbar (tested):29.1 hp (21.7 kW)

Tires

Ag rear:10-38, 11-38, 12-38
Ag front:5.50-16

Engine

Type:gasoline, 6-cylinder, liquid-cooled
Model:Hercules ZXD
Fuel tank:20 gal (75.7 L)
Rated RPM:1800
Air cleaner:oil bath
Bore/Stroke:3.4375x4.125 inches (87 x 105 mm)
Compression:6.71:1
Displacement:236.7 ci (3.9 L)
Starter volts:6
Coolant capacity:17 qts (16.1 L)

Weight

Shipping:4000 lbs (1814 kg)
Ballasted:7495 lbs (3399 kg)
Operating:4512 lbs (2046 kg)

Variants

I:tricycle-front
IFA:adjustable wide-front
IFS:standard front

Dimensions

Height:67 inches (170 cm)
Length:127.25 inches (323 cm)
Wheelbase:94 inches (238 cm)
Rear tread:49 to 90 inches (124 to 228 cm)
Ground clearance:25 inches (63 cm)

Mechanical

Drive:Two-wheel drive
Brakes:Mechanical band brakes
Steering:Manual
Final drives:bull gear
Operator station:Open operator station

Production

Type:Row-Crop tractor
Built in:Longmont, Colorado, USA
Years made:1948 - 1952
Manufacturer:Gibson

Belt Pulley

RPM:1487
Speed:3539 ft/min (1078.69 meters/min)
Width:7.5 inches (19 cm)
Diameter:9.2 inches (23 cm)

Transmission

Type:gear
Gears:4 forward and 1 reverse
Clutch:254mm dry disc

Power Take-off (PTO)

Rear PTO:live
Rear PTO Type:540 (1.375)