Allis Chalmers 8550
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| Production | |
| Manufacturer | Allis Chalmers |
| Four-wheel Drive (4WD) tractor | |
| Original price | $86,753 |
| Allis Chalmers 8550 Engine | |
| Allis Chalmers 12.0L 6-cyl diesel | |
| Fuel tank | 170 gal 643.5 L |
 Engine details ... | |
| Allis Chalmers 8550 Transmission | |
| 20-speed partial power shift | |
 Transmission details ... |
| Allis Chalmers 8550 Power | |
| Engine | 300 hp 223.7 kW |
| Drawbar (claimed) | 210 hp 156.6 kW |
| PTO (claimed) | 250 hp 186.4 kW |
| Drawbar (tested) | 217.92 hp 162.5 kW |
| PTO (tested) | 253.88 hp 189.3 kW |
 Performance test details ... | |
| Mechanical | |
| Four-wheel drive | |
| Steering | hydrostatic power |
| Hydraulic wet discs brakes | |
| Acousta Cab II standard with heat and air-conditioning. Optional radio and 8 track tape deck. | |
| Hydraulics | |
| Type | closed center |
| Valves | 3 or 4 |
| Pump flow | 74.9 gpm 283.5 lpm |
| Tractor hitch | |
| Rear Type | IV/III |
| Power Take-off (PTO) | |
| Rear PTO | independent |
| Rear PTO Type | 1000 |
| Dimensions & Tires | |
| Wheelbase | 126 inches 320 cm |
| Weight | 26400 to 27040 pounds |
| Front tire | 18.4x38 |
| Rear tire | 18.4x38 |
 Full dimensions and tires ... | |
| 8550 Serial Numbers | |
| Location: | Front frame, rear left side |
| 1978 | 1083 |
| 1979 | 1342 |
| 1980 | 1553 |
| 1981 | 1723 |
FAQ: How to read a serial number table. | |
| Electrical | |
| Ground | negative |
| Charging system | alternator |
| Batteries | 4 |
| Battery volts | 12 |
| References | |
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| Four-wheel drives - mammoth size... published in 1978, by Allis Chalmers | |
| 8550 published in 1977, by Allis Chalmers |
| Page information | |
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| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on March 4, 2014 |