Allis-Chalmers 8550 Specs ( 1978-1981 )
Production
| Drive type | Four-wheel Drive (4WD) tractor |
|---|---|
| Manufacturer | Allis Chalmers |
| Original price | $86,753 |
Engine
| Engine type | Allis Chalmers 12.0L 6-cyl diesel |
|---|---|
| Fuel tank | 170 gal (643.5 L) |
| Air cleaner | dry |
| Bore/Stroke | 5.25x6.25 inches (133 x 159 mm) |
| Compression | 16.25:1 |
| Coolant capacity | 72 qts (68.1 L) |
| Description | Allis Chalmers 6120T / turbocharged diesel / 6-cylinder 24-valve / liquid-cooled inline |
| Displacement | 731 ci (12.0 L) |
| Exhaust valve clearance | 0.020 inches (hot) (0.508 mm) |
| Firing order | 1-5-3-6-2-4 |
| Idle RPM | 775-2800 |
| Intake valve clearance | 0.015 inches (hot) (0.381 mm) |
| Oil capacity | 46 qts (2 filter) (43.5 L) |
| Power | 300 hp (223.7 kW) |
| Rated RPM | 2500 |
| Starter volts | 12 |
| Drawbar (claimed) | 210 hp (156.6 kW) |
| Drawbar (tested) | 217.92 hp (162.5 kW) |
| PTO (claimed) | 250 hp (186.4 kW) |
| PTO (tested) | 253.88 hp (189.3 kW) |
Transmission
| Gears | 20 forward and 4 reverse |
|---|---|
| Transmission | Power Director |
| Transmission type | 20-speed partial power shift |
| Type | partial power shift |
Mechanical
| Cab | Acousta Cab II standard with heat and air-conditioning. Optional radio and 8 track tape deck. |
|---|---|
| Description | Hydraulic wet discs brakes |
| Drive type | Four-wheel drive |
| Steering | hydrostatic power |
Hydraulics
| Pump flow | 74.9 gpm (283.5 lpm) |
|---|---|
| Type | closed center |
| Valves | 3 or 4 |
Hitch
| Rear Type | IV/III |
|---|
PTO
| Rear PTO | independent |
|---|---|
| Rear PTO Type | 1000 |
Electrical
| Batteries | 4 |
|---|---|
| Battery volts | 12 |
| Charging system | alternator |
| Ground | negative |
Dimensions & Tires
| Ag front | 18.4x38 / 20.8x34 |
|---|---|
| Ag rear | 18.4x38 / 20.8x34 |
| Front tread | 62 to 123 inches (157 to 312 cm) |
| Ground clearance | 17 inches (43 cm) |
| Length | 285 inches (723 cm) |
| Rear tread | 62 to 123 inches (157 to 312 cm) |
| Wheelbase | 126 inches (320 cm) |
| Width | 95.5 inches (242 cm) |
| Front tire | 18.4x38 |
| Rear tire | 18.4x38 |
| Weight | 26400 to 27040 pounds |
| Wheelbase | 126 inches (320 cm) |
8550 Serial Numbers
| 1978 | 1083 |
|---|---|
| 1979 | 1342 |
| 1980 | 1553 |
| 1981 | 1723 |
| Description | FAQ: How to read a serial number table. |
| Location: | Front frame, rear left side |
Allis Chalmers 8550 Height
| Cab | 139 inches (353 cm) |
|---|---|
| Exhaust | 154 inches (391 cm) |
| Hood | 90.3 inches (229 cm) |
Allis Chalmers 8550 Weight
| Ballasted | 29,360 lbs (13317 kg) |
|---|---|
| Operating | 27,040 lbs (12265 kg) |
| Shipping | 26,400 lbs (duals) (11975 kg) |
Nebraska Tractor Test 1262
| Description | Diesel 20-speed 4WDOctober 15 - 28, 1977Link: Nebraska Tractor Test 1262 file / PTO performance / Drawbar performance / Gear 5SL used for power test. / Gear 2SL used for pull test. |
|---|---|
| Fuel use | 17.4 gal/hour (65.9 l/hour) / 17.5 gal/hour (66.2 l/hour) |
| Max power | 217.92 hp (162.5 kW) |
| Max pull | 26,220 lbs (11893 kg) |
| Power at rated engine speed | 253.88 hp (189.3 kW) |
References
| Description | 8550 published in 1977, by Allis Chalmers |
|---|---|
| Drive type | Four-wheel drives - mammoth size... published in 1978, by Allis Chalmers |
Speeds
| Description | Allis 8550 speeds with 18.4x38 tires. |
|---|