Skip to content
An independent tractor reference
TractorStack.

Find your tractor.

Menu ☰

Years in Production / 1950–1958

Allis-Chalmers

CA

Explore the specifications, hardware, and original references for the Allis-Chalmers CA.

Allis-Chalmers CA · Illustration

Allis-Chalmers CA · Illustration

25hp

Engine estimate · from PTO

2WD Only

Drive

1950–1958

Production years

Allis-Chalmers

Manufacturer

CA / 01

At a glance

Production

Row-Crop tractor

Built in West Allis, Wisconsin, USA

Original price was $1,900 in 1958

The live PTO on the CA was due to a hand clutch that "broke" the rear axle, causing the differential to spin freely.

Manufacturer
Allis Chalmers
Total Built
39,499

Capacity

Fuel
13 gal49.2 L
Hydraulic System
2 gal7.6 L

Hydraulics

Capacity
2 gal7.6 L
Pressure
3200 psi220.6 bar

Hitch

Type
Allis Snap Coupler *Available after 1954.

Pto

Rear Pto
live
Rear Type
538

Belt Pulley

Diameter
8 inches20 cm
Width
5.5 inches13 cm
Rpm
1220
Speed
2555 ft/min778.76 meters/min

Electrical

Ground
positive
Charging System
generator
Charging Amps
10
Battery Volts
6
Battery Ah
95

Mechanical

Two-wheel drive

Manual steering

Differential mechanical contracting band brakes

Open operator station

CA / 02

Under the hood

Engine Detail

Allis Chalmers

gasoline

4-cylinder 8-valve

liquid-cooled vertical I-head

Displacement
125.2 ci2.1 L
Bore Stroke
3.375x3.50 inches86 x 89 mm
Air Cleaner
oil bath
Compression Ratio
6.25:1
Rated Rpm
1650
Firing Order
1-2-4-3
Starter Volts
6
Coolant Capacity
9 qts8.5 L
Sparkplug
AC45
Sparkplug
Autolite A-7
Sparkplug
Autolite A-9
Sparkplug
Champion J-8
Sparkplug Gap
0.030 inches0.762 mm
Point Gap
0.020 inches0.508 mm
Intake Valve Clearance
0.012 inches (hot)0.305 mm
Exhaust Valve Clearance
0.012 inches (hot)0.305 mm
Fuel Type
gasoline
Cylinders
4
Cooling
liquid-cooled vertical I-head

CA / 03

Gears & controls

Transmission

Transmission Type
non-synchronized
Gears
4 forward and 1 reverse
Clutch
dry disc
Oil Capacity
4 qts3.8 L

CA / 04

Size. Stance. Footprint.

Dimensions

Length
125 in317 cm
Height
73 in185 cm
Wheelbase
82 in208 cm
Front tread
6.25 in15 cm
Rear tread
52 in132 cm

Dimensions And Tires

Wheelbase
82 inches208 cm
Weight
2835 lbs1285 kg
Front Tire
5.00-15
Rear Tire
10-24

Tires And Tracks

Front Ag
5.00-15
Rear Ag
10-24

CA / 05

Tractor Photos

Model illustration commons.wikimedia.org source ↗
Allis-Chalmers CA tractor VA1 — Acroterion, CC BY-SA 4.0. Resized; converted to WebP. · Acroterion · CC BY-SA 4.0 commons.wikimedia.org source ↗

See it in action

Videos

Watch Allis-Chalmers CA videos from their original YouTube creators.

1950's Allis Chalmers Dealer Movie Modern Farm Package Model CA Tractor

Video by J and L Videos

Watch on YouTube ↗

CA / 07

Tests (NTTL)

Nebraska Tractor Test 453

Gasoline 4-speed 2WDNovember 31 - 9, 1950

Drawbar performance

Gear 2 used for power test.

Gear 1 used for pull test.

Id
453
Belt Power Max
25.96 hp19.4 kW
Belt Fuel Use Max
2.4 gal/hour9.1 l/hour
Max Power
22.97 hp17.1 kW
Max Pull
3,557 lbs1613 kg

Allis-Chalmers CA · photo 1 / 2

Illustration of Allis-Chalmers CA on a farm

Model illustration commons.wikimedia.org source ↗