Allis Chalmers

Allis Chalmers CA

The Allis Chalmers CA is a row-crop tractor produced from 1950 to 1958 by Allis Chalmers in West Allis, Wisconsin, USA. It features a 2.1L 4-cylinder gasoline engine producing an estimated 25.6 hp, a 4-speed non-synchronized transmission, and two-wheel drive. The tractor has a live rear PTO and an open operator station. It was built in large numbers with 39,499 units produced and originally sold for $1,900 in 1958. The CA is known for its mechanical contracting band brakes and manual steering. It has a wheelbase of 82 inches and weighs 2835 lbs operating weight. The tractor uses 5.00-15 front tires and 10-24 rear tires. The Allis Snap Coupler hitch was available after 1954. The CA is related to the earlier Allis Chalmers C model.

Power25 hp[P]

Founded1950 - 1958

ModelCA

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Technical Specifications

Detailed specifications and technical data for Allis Chalmers CA

Power

Belt (tested)	25.96 hp (19.4 kW)
PTO (claimed)	23 hp (17.2 kW)
Drawbar (tested)	22.97 hp (17.1 kW)
Drawbar (claimed)	18 hp (13.4 kW)

Tires

Ag rear	10-24
Ag front	5.00-15

Engine

Type	gasoline
Cooling	liquid-cooled vertical I-head
Cylinders	4-cylinder 8-valve
Point gap	0.020 inches (0.508 mm)
Rated RPM	1650
Sparkplugs	AC45, Autolite A-7, Autolite A-9, Champion J-8
Air cleaner	oil bath
Bore/Stroke	3.375x3.50 inches (86 x 89 mm)
Displacement	125.2 ci (2.1 L)
Engine model	Allis Chalmers 2.1L 4-cyl gasoline
Firing order	1-2-4-3
Sparkplug gap	0.030 inches (0.762 mm)
Starter volts	6
Coolant capacity	9 qts (8.5 L)
Compression ratio	6.25:1
Intake valve clearance	0.012 inches (hot) (0.305 mm)
Exhaust valve clearance	0.012 inches (hot) (0.305 mm)

Capacity

Fuel	13 gal (49.2 L)
Hydraulic system	2 gal (7.6 L)

Dimensions

Height	73 inches (185 cm)
Length	125 inches (317 cm)
Wheelbase	82 inches (208 cm)
Rear tread	52 to 80 inches (132 to 203 cm)
Front tread	6.25/13 inches (15/33 cm)
Ballasted weight	5045 lbs (2288 kg)
Operating weight	2835 lbs (1285 kg)

Electrical

Ground	positive
Battery AH	95
Battery volts	6
Charging amps	10
Charging system	generator

Hydraulics

Capacity	2 gal (7.6 L)
Pressure	3200 psi (220.6 bar)

Mechanical

Drive	Two-wheel drive
Brakes	Differential mechanical contracting band brakes
Steering	Manual steering
Operator station	Open operator station

Production

Type	Row-Crop tractor
Built in	West Allis, Wisconsin, USA
Live PTO	due to a hand clutch that "broke" the rear axle, causing the differential to spin freely
Total built	39,499
Original price	$1,900 in 1958
Years produced	1950 - 1958

Belt Pulley