Allis-Chalmers G Specs ( 1948-1955 )
Overview
The Allis-Chalmers G is a rear-engine tool carrier tractor produced between 1948 and 1955 with a total production run of 29,976 units. It is powered by a 1.0L Continental four-cylinder gasoline engine and was offered with either a 3-speed gear or 4-speed creeper transmission. Nebraska Tractor Test 398 recorded a maximum belt power of 10.33 hp and a maximum drawbar pull of 1,143 lbs.
Ideal Applications
Tested Drawbar Performance:
In Nebraska Tractor Test 398, the Allis-Chalmers G achieved a maximum drawbar power of 9.04 hp and a maximum pull of 1,143 lbs while operating in first gear.
Tool Carrier Configuration:
The design features a rear-mounted engine and adjustable front and rear tread widths ranging from 36 to 64 inches to support a line of custom under-belly mounted implements.
Engine and Belt Pulley Specifications:
The 62-cubic-inch liquid-cooled engine operates at a rated 1800 RPM and drives a 6-inch diameter belt pulley at 1950 RPM, resulting in a belt speed of 3063 ft/min.
Production
| Description | Tool Carrier tractor / Built in Gadsden, Alabama, USA / Original price was $970 in 1955 / The Allis-Chalmers G was designed for small farms and gardens. The small, rear-engine machine was more like the motor cultivators of the 1920s than a tractor. It featured a full line of custom implements that mounted under the belly. |
|---|---|
| Manufacturer | Allis Chalmers |
| Total built | 29,976 |
Engine
| Engine type | Continental 1.0L 4-cyl gasoline |
|---|---|
| Fuel tank | 5 gal (18.9 L) |
| Air cleaner | oil bath |
| Bore/Stroke | 2.375x3.50 inches (60 x 89 mm) |
| Compression | 5.75:1 |
| Coolant capacity | 6.5 qts (6.2 L) |
| Description | Continental AN-62 / gasoline / 4-cylinder / liquid-cooled vertical L-head |
| Displacement | 62 ci (1.0 L) |
| Exhaust valve clearance | 0.010 inches (hot) (0.254 mm) |
| Firing order | 1-3-4-2 |
| Intake valve clearance | 0.010 inches (hot) (0.254 mm) |
| Point gap | 0.020 inches (0.508 mm) |
| Rated RPM | 1800 |
| Sparkplug gap | 0.025 inches (0.635 mm) |
| Starter volts | 6 |
| Oil capacity | 3.5 qts (3.3 L) |
| Belt (tested) | 10.33 hp (7.7 kW) |
| Drawbar (claimed) | 10 hp (7.5 kW) |
| Drawbar (tested) | 9.04 hp (6.7 kW) |
Transmission
| Clutch | 165.1mm dry disc / 165.1mm dry disc |
|---|---|
| Gears | 3 forward and 1 reverse / 4 forward and 1 reverse |
| Oil capacity | 8 qts (7.6 L) / 8 qts (7.6 L) |
| Transmission | creeper |
| Type | gear / creeper |
| Transmission type | 3-speed gear / 4-speed creeper |
| Transmission type | 3-speed gear / 4-speed creeper |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Manual steering / Mechanical external expanding brakes |
| Drive type | Two-wheel drive |
Electrical
| Battery volts | 6 |
|---|---|
| Charging system | generator |
| Ground | positive |
Dimensions & Tires
| Ag front | 4.00-12 |
|---|---|
| Ag rear | 6-30 |
| Clearance (drawbar) | 13.1 inches (33 cm) |
| Clearance (rear axle) | 17.4 inches (44 cm) |
| Front tread | 36 to 64 inches (91 to 162 cm) |
| Height (steering wheel) | 55.7 inches (141 cm) |
| Length | 116 inches (294 cm) |
| Rear tread | 36 to 64 inches (91 to 162 cm) |
| Wheelbase | 68.5 inches (173 cm) |
| Front tire | 4.00-12 |
| Rear tire | 6-30 |
| Weight | 1285 to 1400 pounds |
| Wheelbase | 68.5 inches (173 cm) |
Allis Chalmers G Weight
| Ballasted | 1750 lbs (793 kg) |
|---|---|
| Operating | 1400 lbs (635 kg) |
| Shipping | 1285 lbs (582 kg) |
Belt Pulley
| Diameter | 6 inches (15 cm) |
|---|---|
| RPM | 1950 |
| Speed | 3063 ft/min (933.60 meters/min) |
| Width | 4 inches (10 cm) |
G Serial Numbers
| 1948 | 6 |
|---|---|
| 1949 | 10961 |
| 1950 | 23180 |
| 1951 | 24006 |
| 1952 | 25269 |
| 1953 | 26497 |
| 1954 | 28036 |
| 1955 | 29036 |
| Description | FAQ: How to read a serial number table. |
| Final | 29976 |
| Location: | Top of transmission case, rear of shift lever |
Links
| Description | Allis G Restoration: photos of the restoration of a 1949 AC G |
|---|
Nebraska Tractor Test 398
| Belt fuel use (max) | 1.2 gal/hour (4.5 l/hour) |
|---|---|
| Belt power (max) | 10.33 hp (7.7 kW) |
| Description | Gasoline 4-speed 2WDJuly 16 - 30, 1948Link: Nebraska Tractor Test 398 file / Drawbar performance / Gear 2 used for power test. / Gear 1 used for pull test. |
| Max power | 9.04 hp (6.7 kW) |
| Max pull | 1,143 lbs (518 kg) |
References
| Description | Model G Rear Engine Tractor published in 1950, by Allis Chalmers / The Model G Tractor published in 1948, by Allis Chalmers / Operating Instructions Model G Tractor (TM-4A) / Farm Equipment Service Manual (SM-3) / Farm Power Facts published in 1954, by Allis Chalmers |
|---|