Allis Chalmers

8550

Farm tractor · 1978–1981 · 300 hp

Allis Chalmers8550
EngineTransmissionHydraulicsPTOHitchDimensionsWeightTires & TracksFuelSteeringCabNebraska TestsMore Allis Chalmers

The Allis Chalmers 8550 is a farm tractor manufactured from 1978 to 1981. It features a Allis Chalmers 6120T engine, and hydrostatic power steering. The transmission is a partial power shift type with 20 forward and 4 reverse.

Engine

EngineAllis Chalmers 6120T
Fuel Typediesel
Cylinders6
Coolingliquid-cooled inline
Turbocharger Statusturbocharged
Displacement731 ci (12 L)
Bore5.25 in (133 mm)
Stroke6.25 in (159 mm)
Compression Ratio16.25
Power Gross300 hp (223.7 kW)
Power Rated300 hp (223.7 kW)
Power PTO253.88 hp (189.3 kW)
Power Drawbar217.92 hp (162.5 kW)
Air Cleanerdry
Starter Volts12
Coolant Capacity72 qts (68.1 L)
ManufacturerAllis Chalmers
Rated2,500 RPM
Idle775-2800 RPM
Firing Order1-5-3-6-2-4

Transmission

Transmission Typepartial power shift
Transmission ModelPower Director
Gears20 forward and 4 reverse
Available Options20-speed partial power shift

Hydraulics

Typeclosed center
Pump Flow74.9 gpm (283.5 lpm)

PTO

Rear Type1000

Hitch

Rear TypeIV/III

Dimensions

Length285 in (723 cm)
Width95.5 in (242 cm)
Height Cab139 in (353 cm)
Wheelbase126 in (320 cm)
Ground Clearance17 in (43 cm)
Front Tread62 in (157 cm)
Rear Tread62 in (157 cm)

Weight

Shipping26,400 lbs (11,975 kg)
Operating27,040 lbs (12,265 kg)
Ballasted29,360 lbs (13,317 kg)

Tires & Tracks

Front Ag18.4x38, 20.8x34
Rear Ag18.4x38, 20.8x34, 20.8x38, 23.1x30, 24.5x32, 30.5x32

Fuel

Capacity170 gal (643.5 L)

Steering

Typehydrostatic power

Cab

CabAcousta Cab II standard with heat and air-conditioning. Optional radio and 8 track tape deck.

Nebraska Tests

NTTLTest #1262
October 15 to 28, 1977 Temperature °F (°C) Fuel Consumption Crank Power

Nebraska Tractor Test

PTO Power
253.88HP
Sound
94.5dB(A)
NTTLTest #1262
October 15 to 28, 1977 Temperature °F (°C) Fuel Consumption Crank Power

Nebraska Tractor Test

PTO Power
253.88HP
Sound
94.5dB(A)