Allis Chalmers 8550 Specs, Weight, Price & Review

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About Allis Chalmers 8550 Specs

The Allis-Chalmers 8550 tractor is a four-wheel drive tractor that was manufactured by Allis Chamers from 1978 to 1981. The Allis Chalmers 8550 has a 12.0L (731). A six-cylinder, diesel engine with a partial powershift transmission has 20 forward and four reverse gears.

Allis Chalmers 8550 tractor used the Allis Chalmers6120T engine. It is a 12.0L, 11980 cm 2,, (731.0cu*in), six-cylinder turbocharged Diesel engine with 133.0mm (5.24 in.) of the bore and 159.0mm (6.26 In.) of the piston stroke.

The compression ratio rating of this engine is 16.25 to 1. This engine produced 304.2 PS (223.7kW; 300.0HP) at 2,500 RPM of output power.

The Allis Chalmers 8550 is equipped with hydrostatic power steering, hydraulic wet disc brakes, Acousta Cab II with heat and air-conditioning, and 643.5 liters (170 US gal.; 141.6 Imp. gal) fuel tank.

Allis Chalmers 8550 Price

1981 ALLIS-CHALMERS 8550 Price:USD $26,500.00

1986 ALLIS-CHALMERS 8550 Price:USD $10,750.00

Allis Chalmers 8550 Weight

26400 to 27040 pounds

Allis Chalmers 8550 Engine oil capacity

46 qts 43.5 L (2 filters)

Allis Chalmers 8550 Model 

1978 – 1981

Allis Chalmers 8550  Serial Number

1978 1083
1979 1342
1980 1553
1981 1723

Allis Chalmers 8550 Specs 

General Specifications

Model Allis Chalmers 8550
Length 7,230 mm (284.6 in)
Width 2,420 mm (95.3 in)
With long axle: 3,030 mm (119.5 in)
Height 3,530 mm (139 in)
Wheelbase 3,200 mm (126 in)
Ground clearance 430 mm (16.9 in)
Weight 12,265 kg (27,040 lbs)
Fuel tank capacity 643.5 litres (170 US gal.; 141.6 Imp. gal)
Battery Four 12V
Cabin type Acoustic Cab II with heat and air-conditioning.


Engine model Allis Chalmers 6120T
Engine type Four-stroke, liquid-cooled, inline
Cylinders 6
Fuel type Diesel
Displacement 12.0 L, 11,980 cm2, (731.0 cu·in)
Bore and stroke 133.0 mm X 159.0 mm (5.24 in X 6.26 in)
Compression ratio 16.25:1
Horsepower 304.2 PS (223.7 kW; 300 HP) at 2,500 rpm
Starter Electric
Oil capacity: With 2 filters: 43.5 L (46.0 US. qt, 38.3 Imp. qt.)
With 3 filters: 56.8 L (60.0 US. qt, 50.0 Imp. qt.)
Coolant capacity: 68.1 L (72 US. qt, 59.9 Imp. qt.)

Transmission and chassis

Chassis 4×4 MFWD 4WD
Steering type Hydrostatic power
Brakes Hydraulic wet discs
Transmission model Power Director
Transmission type Partial power shift
Gears 20 forward and 4 reverse
Speed Forward: 30.1 km (18.7 mph) Reverse: 18.7 (11.6 mph)


Front tires Ag: 18.4×38,
Rear tires Ag: 18.4×38

PTO (Power take-off shaft

Rear PTO type Independent
Rear PTO speed 1,000 rpm

Hydraulic system

Hydraulic type Closed centre
Valves 3 or 4
Pump flow 74.9 GPM (283.5 pm)

Allis Chalmers 8550 Problems

There are a variety of issues associated with the Allis Chalmers 8550, but we will list the top frequent and common in the next paragraphs. Current owners of 8550 identified these issues.

It is probable that the tractor will not be affected by any of these issues. It is therefore essential to evaluate your farm prior to buying the tractor.

1. Fuel Consumption

If you’re looking to buy a low-energy tractor for your farm, then Allis Chalmers 8550 isn’t the right choice for you. According to those who have used Allis Chalmers, it has very little fuel efficiency and is therefore incompatible with small-scale farms. Based on the advice of experts it is best to not buy a product with low efficiency in fuel.

It’s because it’ll directly impact your costs of production. Furthermore, the price of production could make it difficult for your business to compete in the world. So, it is essential to prepare a feasibility study prior to buying a machine for your specific field. Also, you should talk to the current users of the machine to find out more about their experience.

2. Battery Issues

Another issue that’s most frequently encountered with 8550 is the battery problem. According to those who have used 8550 the machine has difficulties starting whenever the battery’s health is poor.

It is highly likely that if you shut off the engine in the middle of your journey, it will not restart. If you believe that the battery’s health is declining, then recharge it as quickly as you can.

Allis Chalmers 8550 Review

The Allis-Chalmers 8550, made from 1977 to 1981, was a robust and capable tractor celebrated for its remarkable pulling strength and sturdy build. It was the biggest tractor that Allis-Chalmers produced at that time and earned the nickname “The Super Beast” due to its impressive capabilities.

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