Allis Chalmers 8550

Allis Chalmers 8550The Allis Chalmers 8550 is a four-wheel drive tractor manufactured by Allis Chalmers in from 1978 to 1981. The Allis Chalmers 8550 is equipped with a 12.0 L (731.[ cu·in) six-cylinder diesel engine and a partial power shift transmission with 20 forward and 4 reverse gears.

The Allis Chalmers 8550 tractor used the Allis Chalmers 6120T engine. It is a 12.0 L, 11,980 cm2, (731.0 cu·in) six-cylinder turbocharged diesel engine with 133.0 mm (5.24 in) of the cylinder bore and 159.0 mm (6.26 in) of the piston stroke. The compression ratio rating is 16.25:1. This engine produced 304.2 PS (223.7 kW; 300.0 HP) at 2,500 rpm of output power.

The Allis Chalmers 8550 is equipped with hydrostatic power steering, hydraulic wet discs 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 Specifications

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)
Wheel base 3,200 mm (126 in)
Ground clearance 430 mm (16.9 in)
Weight 12,265 kg (27,040 lbs)
Fuel tank capacity 643.5 liters (170 US gal.; 141.6 Imp. gal)
Battery Four 12V
Cabin type Acousta 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 kmh (18.7 mph) Reverse: 18.7 (11.6 mph)
Front tires Ag: 18.4×38,
Rear tires Ag: 18.4×38
Three-Point Hitch
Caterogy IV/III
Control type
Lift capacity (at ends)
PTO (Power take-off shaft)
Rear PTO type Independent
Rear PTO speed 1,000 rpm
Hydraulic system
Hydraulic type Closed center
Valves 3 or 4
Pump flow 74.9 gpm (283.5 lpm)
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