Allis Chalmers 8550: all source data
All 75 values recorded for this model, as the source lists them and in its units. The spec sheet shows the same data checked, typed and converted.
Overview
Production| Manufacturer | Allis Chalmers |
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| (no label) | Four-wheel Drive (4WD) tractor |
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| Original price | $86,753 |
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Engine| (no label) | Allis Chalmers 12.0L 6-cyl diesel |
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| Fuel tank | 170 gal | 643.5 L |
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Transmission| (no label) | 20-speed partial power shift |
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Power| Engine | 300 hp | 223.7 kW |
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| Drawbar (claimed) | 210 hp | 156.6 kW |
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| PTO (claimed) | 250 hp | 186.4 kW |
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| Drawbar (tested) | 217.92 hp | 162.5 kW |
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| PTO (tested) | 253.88 hp | 189.3 kW |
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Mechanical| (no label) | Four-wheel drive |
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| Steering | hydrostatic power |
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| (no label) | Hydraulic wet discs brakes |
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| (no label) | Acousta Cab II standard with heat and air-conditioning. Optional radio and 8 track tape deck. |
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Hydraulics| Type | closed center |
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| Valves | 3 or 4 |
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| Pump flow | 74.9 gpm | 283.5 lpm |
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Pto| Rear PTO | independent |
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| Rear PTO Type | 1000 |
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Dimensions| Wheelbase | 126 inches | 320 cm |
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| Weight | 26400 to 27040 pounds |
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| Front tire | 18.4x38 |
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| Rear tire | 18.4x38 |
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Electrical| Ground | negative |
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| Charging system | alternator |
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| Batteries | 4 |
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| Battery volts | 12 |
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Engine
Engine detail| (no label) | Allis Chalmers 6120T |
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| (no label) | turbocharged diesel |
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| (no label) | 6-cylinder 24-valve |
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| (no label) | liquid-cooled inline |
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| Displacement | 731 ci | 12.0 L |
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| Bore/Stroke | 5.25x6.25 inches | 133 x 159 mm |
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| Power | 300 hp | 223.7 kW |
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| Air cleaner | dry |
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| Compression | 16.25:1 |
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| Rated RPM | 2500 |
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| Idle RPM | 775-2800 |
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| Firing order | 1-5-3-6-2-4 |
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| Starter volts | 12 |
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| Oil capacity | 46 qts (2 filter) | 43.5 L |
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| Oil capacity | 60 qts (3 filter) | 56.8 L |
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| Coolant capacity (Coolant) | 72 qts | 68.1 L |
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| Intake valve clearance | 0.015 inches (hot) | 0.381 mm |
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| Exhaust valve clearance | 0.020 inches (hot) | 0.508 mm |
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Transmission
Transmission| Transmission | Power Director |
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| Type | partial power shift |
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| Gears | 20 forward and 4 reverse |
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Dimensions
Tires| Ag front | 18.4x38 |
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| Ag rear | 18.4x38 |
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| Ag front | 20.8x34 |
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| Ag front | 20.8x38 |
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| Ag front | 23.1x30 |
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| Ag front | 24.5x32 |
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| Ag front | 30.5x32 |
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| Ag rear | 20.8x34 |
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| Ag rear | 20.8x38 |
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| Ag rear | 23.1x30 |
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| Ag rear | 24.5x32 |
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| Ag rear | 30.5x32 |
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Dimensions| Wheelbase | 126 inches | 320 cm |
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| Length | 285 inches | 723 cm |
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| Width | 95.5 inches | 242 cm |
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| Width | 119.5 inches (long axle) | 303 cm |
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| Ground clearance | 17 inches | 43 cm |
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| Front tread | 62 to 123 inches | 157 to 312 cm |
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| Rear tread | 62 to 123 inches | 157 to 312 cm |
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Weight| Shipping | 26,400 lbs (duals) | 11975 kg |
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| Operating | 27,040 lbs | 12265 kg |
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| Ballasted | 29,360 lbs | 13317 kg |
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Height| Hood | 90.3 inches | 229 cm |
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| Cab | 139 inches | 353 cm |
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| Exhaust | 154 inches | 391 cm |
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