Allis-Chalmers

The Allis-Chalmers Model B, introduced in 1937, was the first modern tractor available for under 500 dollars. The Model B was designed to pull a single-bottom plow, replacing the horse. Its appearance, with its rounded lines, differed significantly from earlier A-C tractors. The tractor's frame was very narrow in construction. It was designed for rubber tires, but during the war, many were equipped with steel wheels. The engine was A-C's 1.9-liter four-cylinder gasoline engine. Power from the belt pulley was 16 horsepower. There were three forward gears. Optional equipment included a hydraulic lift, electric start, and from 1945 onward, an adjustable front axle track width. The Model B did not have the traditional belt pulley on the side of the tractor as standard; instead, it was attached to the power take-off shaft at the rear when needed. The early B models featured steering brakes operated by hand levers.

A combine harvester, the All-Crop Model 40, was customized for the Model B and also became popular.

The Model B was also assembled in Britain from 1947 to 1949. In total, about 120,000 units were sold.

In 1941, the Model C was introduced, which was very similar to the B but sized for a two-bottom plow.

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Tractors

Allis-Chalmers B, C

The Allis-Chalmers WD replaced the preceding WC model in 1948. It looked almost the same, but there were many improvements. The engine's compression ratio and RPM were increased. The power was rated at 36 hp in the USA, but only 27.5 hp in Europe. Alongside the gasoline version, versions running on kerosene and liquefied petroleum gas were offered. The dual clutch was quite advanced technology at this stage and made operation easier since the power take-off and hydraulics operated independently of the driving clutch. The power take-off clutch was oil-bath type and was operated by a hand lever. The brakes were now pedal-operated. The hydraulic lift was equipped with draft sensing. A special feature was the Power-shift rims, where the track width could be adjusted without lifting the tractor or turning the center disc, using curved rails welded to the rim. In 1952, a new constant mesh gearbox was introduced.

145,000 WD units were produced in six years. About twenty of these ended up in Finland. In 1953, a redesigned model, the WD45, was introduced. The displacement of the gasoline engine increased to 3.7 liters by lengthening the stroke. Power was also increased by raising the compression ratio from 4.5 to 6.45. A quick-attachment device, which became standard equipment, allowed the implement to be connected while sitting on the tractor seat.

In the early 1950s, Allis began looking for a diesel engine for its tractors. It ended up purchasing the Buda engine manufacturer in 1953. The WD45 Diesel was brought to market in the fall of 1954. The engine was a 3.8-liter 6-cylinder. The electrical system was 6 volts, but the diesel model had two batteries. The diesel model cost 40% more, and only 8% of WD45 buyers chose it. In 1956, power steering became an optional extra on the WD45. Over 90,000 WD45 units were sold.

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Allis-Chalmers WD

Allis-Chalmers started manufacturing tractors in England in 1947. Gradually, most of the parts were also of British origin, including the electrical equipment made by Lucas. The manufacturing mainly involved model B. In the very early phase, a small batch of model WC was also assembled. From 1950 onwards, the English B model featured a straight front axle different from the American version. The lifting device was modified to a three-point hitch, but it was not on par with European tractors. British Allis tractors were also exported to Australia and Canada.

In 1954, the model D-270, a further development of the B for the European market, was introduced. Despite the model designation, it was most often equipped with a petrol or gasoline engine. The diesel version had a 2.36-liter Perkins engine. The diesel model had a 9" clutch instead of an 8" one. Unlike the American models, the electrical system was 12 volts. A new feature in the D-270 was a separate power take-off (PTO) clutch operated by a hand lever. The differential lock and weight transfer system were still missing. Alongside the standard models, there were also versions in production such as a smaller version in every direction and a version equipped with higher ground clearance.

In 1957, the updated D-272 replaced the D-270. The basic technology remained the same, with slightly more power from the diesel engine. The appearance was modernized and some parts were reinforced. Compared to its competitors, however, this successor of the B model was already beginning to appear outdated.

There is unusually wide variation in the technical specifications of these models as reported in different countries.

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Allis-Chalmers D-270 – D-272

The Allis-Chalmers 7000 series was introduced in 1973 and was very successful. In designing the successor, the basic structure was kept the same, and the focus was on improving the features that had been requested. The main wishes were for a more modern cab and a four-wheel-drive model. The 8000 series came onto the market in 1981. The power of the smallest model, the 8010, remained the same and it had a 4.9-liter turbocharged six-cylinder engine. The second smallest model switched to a 7.0-liter engine. The largest model, the 8070, had 10 horsepower less than the previous 7080, so that a Power Shift transmission with 6-speed quick shift could be installed. The basic transmission, the Power Director, was equipped with a 2-speed quick shift, but most tractors were purchased with the Power Shift.

The wheelbase of the four-wheel-drive model was remarkably short, and with its 10-meter turning radius, it was more maneuverable than its competitors. The four-wheel drive was engaged electrically. A limited-slip differential lock was available as an option for the front axle. The load-sensing hydraulics remained the same. In addition to the previous 3-ton lifting capacity, a 3.7-ton lifting device was available. The cab was 38% more spacious than before. More powerful models were also in development, but Allis-Chalmers ran out of money before they could be completed.

KHD purchased the Allis-Chalmers Agricultural Equipment Company in May 1985. The tractor brand changed to Deutz-Allis. However, Deutz had no intention of manufacturing tractors in the USA, and the last tractors at the Allis plant were produced in December 1985. After that, the Deutz-Allis brand appeared on pale green tractors imported from Germany.

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Allis-Chalmers 8010-8070

The frame-steered Allis-Chalmers models 7580 and 8550 were succeeded at the beginning of 1982 by models 4W-220 and 4W-305. The design was modernized and the cab was new. Technical changes were minimal. The engine speed was reduced to 2400 rpm. The 4W-305’s engine was 12.0 liters. The transmission was still 20+4 Power Director with a 2-speed hi-lo gear. The hydraulics were load-sensing. The cab was more spacious than before, and the mechanical noise-conducting linkages were removed. The doors were really large, and the capacity of the air conditioning was increased. The fuel tanks were larger than previously. After the 8000-series four-wheel-drive models came to the market, sales of frame-steer tractors declined, and in total only about 600 units of the 4W models were produced over four years.

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Allis-Chalmers 4W-220 – 4W-305

Allis-Chalmers bought 440 Landhandlers from Steiger, but at the same time was developing its own articulated four-wheel-drive tractor. The 7580 was completed in 1976. Of its parts, 73% were shared with the 7000 series two-wheel-drive tractors. The engine was a version of the 7080’s engine boosted by 10 horsepower. For the first time, Allis announced an increase in torque: 29.9%. The transmission was a 20+4 Power Director with a 2-speed quick shift. The total output of the hydraulic pumps was 284 l/min, of which 87 l/min served the load-sensing system for the external hydraulics—the largest share went to the articulated steering. There were three hydraulic blocks as standard, and flow control could be adjusted from the cab. The lift had draft sensing and lifting power was the same 3 tons as in the smaller 7000 series models. The Acousta Cab II was similar to that of the smaller models, with a noise level of 79 dB. There were no steering brakes.

In the summer of 1977, the 300-horsepower 8550 was introduced alongside it, marking the switch to a black frame. The engine was Allis’s own 12.0-liter 6-cylinder with two turbochargers and four-valve technology. The lift was considerably more robustly built, and the lifting power was 4.4 tons.

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Allis-Chalmers 7580-8550

Allis-Chalmers had already found a partner in Fiat with the 5050 model. However, for successors to the older 175 and 185 models, they wanted tractors of their own design. They decided to purchase the rear assembly, including the transmission, from Fiat. On the 6060 this came from Fiat’s 780 series, and on the 6080 from the 980 series. The engines were Allis-Chalmers’ own 3.3-liter turbocharged units. The 6060 boasted a 35 % increase in torque. Its gearbox was a partly synchronized 8+2, while the 6080 had a fully synchronized 12+3. The clutch disc was ceramic.

Both models were also offered in a four-wheel-drive version with Fiat’s front axle, and about one third of buyers chose four-wheel drive. The optional cab was similar to that introduced at the same time on the 8000 series, but smaller. Noise levels were 79–81 dB, making it one of the quietest in its class.

In 1984 the 6060 was replaced by the slightly more powerful 6070, which also featured a 12+3 gearbox.

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Allis-Chalmers 6060-6080

More from this manufacturer

The successor to Model C was the CA, introduced in 1950. It adopted features from the WD model, such as quick-adjustable track width and a separate power take-off clutch. The engine was the predecessor's 2.0-liter gasoline engine, but the compression ratio and revolutions were increased, resulting in a power output of 26.6 hp. The transmission was now a 4+1 constant mesh gearbox. Electric start and lights were standard. The wheelbase was 12 cm longer than the previous model. About half of the CAs were sold with dual front wheels and half with a wide front axle.

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Allis-Chalmers CA

malli

hinta (sis. alv)

Series specifier

Manufacturer name

Model specifier

Imported to Finland

Years

Engine model

Cyl/Turbo/Intercooler

Displacement

Bore x stroke

Rated power

Max power

Torque

Gears

Creeper speeds

Synchronized gears

Powershift gears

Reverser

Speeds in km/h

Max. speed 

Hydr. flow l/min

Hydraulic pressure

Lift controls

Lift capacity

PTO speeds

Brakes

Steering

Turning circle m 2WD

Turning circle m 4WD

Front tyres 2WD

Front tyres 4WD

Rear tyres 2WD

Rear tyres 4WD

Weight 2WD

Weight 4WD

Height with cab

Length (2WD/4WD)

Wheelbase (2WD/4WD)

Fuel tank

Cab noise level

Solid cab

Diff. lock

Autom. differential locks

Air suspension seat

Air conditioning

Trip computer

Creeper gear

sylinterien lukumäärä

iskutilavuus

iskusuhde

suurin vääntömomentti, nm

suurin vääntömomentti, r/min

vääntömomentin nousu

polttonesteen kulutus suurimman tehon pisteessä

kytkimen tyyppi

ajovoimanotto

nopeus eteenpäin moottorin nimellisnopeudella, pienin

nopeus eteenpäin moottorin nimellisnopeudella, suurin

jarrut

hydrauliikan suurin paine

hydrauliikan suurin tuotto

nostolaitehydrauliikan hallinta

ulkopuolinen hydrauliikka, venttiililohkoja

1-toimisia

2-toimisia

nostovoima (kn=100 kg)

hydrauliikan tyyppi

kääntöympyrän halkaisija ilman ohjausjarrua

eturenkaat

takarenkaat

kokonaismassa säiliöt täynnä vakiovarustein

etuakselipaino

taka-akselipaino

suurin korkeus (ohjaamon ylimpään kohtaan)

kokonaispituus

akseliväli

maavara, pienin

polttoainesäiliön tilavuus

korkein melutaso

etuakselin tasauspyörästön lukko

etunostolaite

etulokasuojat

ilmastointilaite

perävaunun jarruventtiili

ilmaistuin

ohjauksen tyyppi

Etusivu

Ajoneuvot ja ympäristö

Huolto ja tekniikka

Lukijan idea

Maarakennus

Maatalous

Osastot

Metsä

Pääkirjoitus

Uutiset

Weteraani

Yritykset ja tapahtumat

Koneviesti

Lehdet

Konedata

Palvelut

Tilaa Koneviesti

Asiakaspalvelu

Jätä ilmoitus

Tilaa uutiskirje

Lähetä uutisvinkki

Lähetä palautetta

Lähetä oikaisupyyntö

Toimituksen yhteystiedot

Mediamyynnin yhteystiedot

Ota yhteyttä

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