Allis Chalmers 8550

Allis Chalmers 8550 Technical Specifications

Allis Chalmers 8550 is a Row-Crop tractor that was produced by the John Deere between 1978 – 1981.

Below you will find detailed technical specifications for Allis Chalmers 8550 covering engine types, horsepower ratings, weight, height, fuel type and tank volume, oil capacity and type, hydraulic system diagram, wiring diagram, battery specs, etc.

Allis Chalmers 8550 Production

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

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

Allis Chalmers 8550 Electrical

Ground: negative
Charging system: alternator
Batteries: 4
Battery volts: 12

Allis Chalmers 8550 Mechanical

Chassis: 4×4 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


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

Tracktor Hitch

Rear Type: IV/III

Power Take-off (PTO)

Rear PTO: independent
Rear RPM: 1000

Allis Chalmers 8550 Engine detail

Engine Detail
Allis Chalmers 6120T
turbocharged diesel
6-cylinder 24-valve
liquid-cooled inline
Displacement: 731 ci
12.0 L
Bore/Stroke: 5.25×6.25 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)

Allis Chalmers 8550 Transmission overview

Engine Oil

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

Allis Chalmers 8550 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

Allis Chalmers 8550 Weight
Shipping: 26,400 lbs
11975 kg (duals)
Operating: 27,040 lbs
12265 kg
Ballasted: 29,360 lbs
13317 kg

Allis Chalmers 8550 Height
Hood: 90.3 inches
229 cm
Cab: 139 inches
353 cm
Exhaust: 154 inches
391 cm

Allis Chalmers 8550 Tests

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.


Is Allis Chalmers 8550 a good tractor?

The Allis Chalmers 8550 is one of the great tractors in the Allis Chalmers stable, and it has earned Allis Chalmers a fantastic reputation.

How much oil does a Allis Chalmers 8550 take?

Check out the Allis Chalmers 8550 oil capacity and oil type in the engine specs section as it may vary across the engines. Keep in mind, that older models might have their oil capacity increased over time. You may compare between the early and late oil capacity.

Do tractors have VIN numbers?

Every tractor has a VIN number. The number is usually engraved below the driver’s seat. Tractor manufacturers put the number in different places on the tractor body.

What was the last year Allis Chalmers made the ?

The Allis Chalmers 8550 was an agricultural tractor model made from 1978 – 1981

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