Allis Chalmers 18-30 tractor specifications

1918 - 1921

1918 - 1921 Standard-tread tractor

Series:

Series:18-3020-35 ↓

1922 - 1930

Standard-tread tractor

Production

Production
Manufacturer:	Allis Chalmers
Type:	Standard-tread tractor
Factory:	West Allis, Wisconsin, USA
When the Allis-Chalmers E 18-30 was re-tested in 1921 at 930 RPM, it produced a rated 38 belt horsepower. The tractor was re-named the 20-35.

Allis Chalmers 20-35 Power

Allis Chalmers 20-35 Power
Drawbar (claimed):	20 hp 14.9 kW
Belt (claimed):	35 hp 26.1 kW
Drawbar (tested):	33.20 hp 24.8 kW
Belt (tested):	44.29 hp 33.0 kW
power test details ...

Allis Chalmers 20-35 Engine

Allis Chalmers 20-35 Engine
Allis Chalmers 7.6L 4-cyl gasoline
Fuel tank:	25 gal 94.6 L
Aux. fuel:	7.75 gal 29.3 L
Engine details ...

Mechanical

Mechanical
Chassis:	4x2 2WD
Steering:	manual
Cab:	Open operator station.
Transmission:	2-speed unsynchronized gear
Transmission details ...

Dimensions & Tires

Dimensions & Tires
Weight:	6640 lbs 3011 kg
Front tire:	36x6
Rear tire:	50x12
Full dimensions and tires ...

20-35 Serial Numbers

20-35 Serial Numbers
Location:	Serial number on a plate in front of the steering wheel until 1927. After, the serial number is front of shifter on transmission case.
1923:	6161
1924:	6397
1925:	6755
1926:	7369
1927:	8070
1928:	9870
1929:	16762
1930:	23252
Final:	24185
how to read serial numbers...

Belt Pulley

Belt Pulley
Diameter:	13 inches 33 cm
Width:	8.5 inches 21 cm
RPM:	930

Production

Production Manufacturer:Allis Chalmers
Type:Standard-tread tractor
Factory:West Allis, Wisconsin, USA
Total built:1160
Original price:$1,785 (1919 )
Originally named the Allis-Chalmers 15-30, the tractor was renamed 18-30 after the first Nebraska test.

Allis Chalmers 18-30 Power

Allis Chalmers 18-30 Power Drawbar (claimed):18 hp
13.4 kW
Belt (claimed):30 hp
22.4 kW
Plows:3
Drawbar (tested):20.55 hp
15.3 kW
Belt (tested):33.41 hp
24.9 kW
power test details ...

1918 - 1921

Standard-tread tractor

Series:

Series:	18-30
	20-35 ↓

Nebraska Tractor Test 55

Nebraska Tractor Test 55
Gasoline 2-speed 2WD August 23 - September 6, 1920 Link: Nebraska Tractor Test 55 file
Belt power (max):	33.41 hp 24.9 kW
Belt fuel use (max):	4.6 gal/hour 17.4 l/hour
Drawbar performance
Max power:	20.55 hp 15.3 kW
Fuel use:	3.5 gal/hour 13.2 l/hour
Max pull:	3,500 lbs 1587 kg

Allis Chalmers 18-30 Engine

Allis Chalmers 18-30 Engine Allis Chalmers 7.6L 4-cyl gasoline Fuel tank:25 gal
94.6 L
Aux. fuel:7.75 gal
29.3 L
Engine details ...

1918 - 1921

Standard-tread tractor

Series:

Series:	18-30
	20-35 ↓

Engine Detail

Engine Detail
Allis Chalmers
gasoline
4-cylinder
liquid-cooled vertical valve-in-head
Displacement:	460.7 ci 7.6 L
Bore/Stroke:	4.75x6.50 inches 121 x 165 mm
Fuel system:	Kingston L 1.5" carburetor
Air cleaner:	oil bath
Rated RPM:	830
Coolant capacity:	40 qts 37.9 L