Allis Chalmers 8550 tractor specifications

1978 - 1981

1978 - 1981 Four-wheel Drive (4WD) tractor

Production

Production Manufacturer:Allis Chalmers
Type:Four-wheel Drive (4WD) tractor
Original price:$86,753

Allis Chalmers 8550 Power

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
power test details ...

1978 - 1981

Four-wheel Drive (4WD) tractor

Nebraska Tractor Test 1262

Nebraska Tractor Test 1262
Diesel 20-speed 4WD October 15 - 28, 1977 Link: Nebraska Tractor Test 1262 file
PTO performance
Power at rated engine speed:	253.88 hp 189.3 kW
Fuel use:	17.4 gal/hour 65.9 l/hour
Drawbar performance
Max power:	217.92 hp 162.5 kW
Fuel use:	17.5 gal/hour 66.2 l/hour
Gear 5SL used for power test.
Max pull:	26,220 lbs 11893 kg
Gear 2SL used for pull test.

Allis Chalmers 8550 Engine

Allis Chalmers 8550 Engine Allis Chalmers 12.0L 6-cyl diesel Fuel tank:170 gal
643.5 L
Engine details ...

1978 - 1981

Four-wheel Drive (4WD) tractor

Engine Detail

Engine Detail
Allis Chalmers 6120T
turbocharged diesel
6-cylinder 24-valve
liquid-cooled inline
Displacement:	731 ci 12.0 L
Bore/Stroke:	5.25x6.25 inches 133 x 159 mm
Power:	300 hp 223.7 kW
Air cleaner:	dry
Compression:	16.25:1
Rated RPM:	2500
Idle RPM:	775-2800
Firing order:	1-5-3-6-2-4
Starter volts:	12
Oil capacity:	46 qts 43.5 L (2 filter)
	60 qts 56.8 L (3 filter)
Coolant capacity:	72 qts 68.1 L
Intake valve clearance:	0.015 inches 0.381 mm (hot)
Exhaust valve clearance:	0.020 inches 0.508 mm (hot)

Mechanical

Mechanical Chassis:4x4 articulated 4WD
Steering:hydrostatic power
Brakes:hydraulic wet discs
Cab:Acousta Cab II standard with heat and air-conditioning. Optional radio and 8 track tape deck.
Transmission:20-speed partial power shift
Transmission details ...

1978 - 1981

Four-wheel Drive (4WD) tractor

Transmission

Transmission
Transmission:	Power Director
Type:	partial power shift
Gears:	20 forward and 4 reverse

Speeds

Speeds
Allis 8550 speeds with 18.4x38 tires.

Hydraulics

Hydraulics Type:closed center
Valves:3 or 4
Pump flow:74.9 gpm
283.5 lpm

Tractor hitch

Tractor hitch Rear Type:IV/III

Power Take-off (PTO)

Power Take-off (PTO) Rear PTO:independent
Rear RPM:1000

Dimensions & Tires

Dimensions & Tires Wheelbase:126 inches
320 cm
Weight:26400 to 27040 pounds
Front tire:18.4x38
Rear tire:18.4x38
Full dimensions and tires ...

1978 - 1981

Four-wheel Drive (4WD) tractor

Allis Chalmers 8550 Tires

Allis Chalmers 8550 Tires
Ag front:	18.4x38
Ag rear:	18.4x38
Ag front:	20.8x34
	20.8x38
	23.1x30
	24.5x32
	30.5x32
Ag rear:	20.8x34
	20.8x38
	23.1x30
	24.5x32
	30.5x32

Dimensions

Dimensions
Wheelbase:	126 inches 320 cm
Length:	285 inches 723 cm
Width:	95.5 inches 242 cm
	119.5 inches 303 cm (long axle)
Ground clearance:	17 inches 43 cm
Front tread:	62 to 123 inches 157 to 312 cm
Rear tread:	62 to 123 inches 157 to 312 cm