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Allis Chalmers 8550 Tractor Parts

About the Allis-Chalmers 8550

The Allis-Chalmers 8550 was a large four-wheel-drive tractor built for the biggest field operations. It used a 12.0-liter six-cylinder diesel, 20-speed partial power-shift transmission, independent PTO, and a standard Acousta Cab II.

The 8550 was produced from 1978 through 1981 and was followed by the 4W-305. Its four-wheel-drive chassis and 300-horsepower diesel make it a different machine from the 8000 Series row-crop tractors, even though the model numbers are from the same late Allis-Chalmers era.

Serial Number Reference

Serial number locations: The tractor serial number is on the rear left side of the front frame.

The table below shows the beginning tractor serial number for each Model 8550 year:

 

1978-1979
Model 8550 year Beginning serial number
1978 1,083
1979 1,342
1980-1980
Model 8550 year Beginning serial number
1980 1,553
1981-1981
Model 8550 year Beginning serial number
1981 1,723

Total production: Unknown.

Allis-Chalmers 8550 Paint Reference

For restoration planning, the Allis-Chalmers 8550 is listed in the Allis-Chalmers tractor paint guide with the original paint references below.

Allis-Chalmers 8550 paint reference by production period
Production period Metal Wheels Disc Chassis Trim
1978 through 1985 Corporate Orange Cloud White Cloud White, Aluminum Black Semi-Gloss Cloud White roof

Paint placement can vary by production year, series, and equipment configuration.

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  • Close-up of a silver metal engine oil pressure switch for Allis-Chalmers farm tractors, with a threaded mounting end, black electrical insulator, and flat brass terminal. Product listing names D21, 180, 185, 190, 190XT, 190XT III, 200, 210, and 220 models.

    Allis-Chalmers Engine Oil Pressure Switch D21 180 185 190 190XT 190XT III 200 210 220

    Allis-Chalmers
    $19.95
    74021445
    Part Number: 74021445Allis-Chalmers Engine Oil Pressure SwitchEngine oil pressure switch for listed tractors and combines.FitsAllis Chalmers - D21, 180, 185, 190, 190XT, 190XT III, 200, 210, 220, 220...
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  • Allis-Chalmers Tractor Parts Catalog 2025, vintage farm tractor parts catalog cover with sunset landscape background.

    Allis Chalmers Tractor Parts Catalog

    Allis-Chalmers
    $0.00
    0000
    The Allis Chalmers Tractor Parts Catalog (2025) is a comprehensive parts guide for Allis Chalmers tractors. It is available as a hard copy and as a printable PDF catalog. Part Number: 0000 Current...
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  • Allis-Chalmers Ammeter 60-0-60 AMP Gauge 2 inch Diameter, analog display of electrical current measurement with black dial and red needle.

    Ammeter 60-0-60 AMP Gauge 2" Dia

    Allis-Chalmers
    $23.00
    AMG60
    Universal 60-0-60 AMP ammeter gauge with a 2" dia. hole fitment. Condition: New.Part Number: AMG60FitsAllis Chalmers - 160, 170, 175, 180, 185, 190, 190XT, 200, 210, 220, 2RCP, 4650, 4660, 4W-220,...
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  • Metal hood snap latch for Allis-Chalmers farm tractors, shown on a white background. The black-and-silver latch has a curved lever, mounting plate with a round bolt hole, and a rectangular catch.

    Hood Latch Snap Latch for Allis Chalmers D10 D12 D14 D15 D17 D19 D21

    Allis-Chalmers
    $12.00
    CH4000
    Part Number: CH4000Hood Latch Snap LatchHood latch snap latch for select Allis Chalmers tractors, bale throwers, balers, and some Gleaner combines. Strike not included.FitsALLIS CHALMERS - D10, D12,...
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  • Allis-Chalmers Steering Wheel - OL-139D

    Steering Wheel

    Allis-Chalmers
    $65.75
    OL-139D
    Steering wheel for listed Allis-Chalmers, Minneapolis Moline, Oliver, and White models.Part Number: OL-139DFitsAllis Chalmers - 4W220, 4W305, 6060, 6070, 6080, 7000 (SN: 8001 & up), 7010, 7020, 7045,...
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  • Allis-Chalmers Tractor Steering Wheel Nut, black metal hex nut with internal threading for steering wheel attachment.

    Allis-Chalmers Tractor Steering Wheel Nut 70208584 70252471

    Allis-Chalmers
    $6.25
    AB-504D
    Steering wheel nut for Allis-Chalmers and listed Case, IH/Farmall, Massey Ferguson, MM, Oliver, and White applications. Confirm fitment against the tractor model and listed power steering or steering...
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  • Allis-Chalmers INDAK Ignition Key for Allis-Chalmers tractors, close-up image of a silver metal key with the engraved text 'INDIAK', isolated on white background.

    INDAK Ignition Key for Allis-Chalmers, Case 70241977

    Allis-Chalmers
    $4.75
    KY-1094D
    USA-made INDAK ignition key for listed Allis-Chalmers and Case models.Fits MMS023 switch and MMS025 switch.Part Number: KY-1094DFitsAllis Chalmers: D17 (sn 75001 and up), 160, 170, 175, 180, 185,...
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  • Allis-Chalmers Universal 2 Terminal Push Button Starter Switch and Ether Switch, close-up of the metal and black plastic switch with threaded metal base.

    Universal 2 Terminal Push Button Starter Switch and Ether Switch

    Allis-Chalmers
    $12.75
    AB-233D
    Universal 2 Terminal Push Button Starter Switch and Ether Switch with a heavy duty momentary push button design. It features a rubber cap for dust and moisture protection.Part Number:...
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  • Allis-Chalmers RADIATOR DRAIN PLUG | Hydraulic Drain Plug | Block Drain Plug

    Allis-Chalmers Radiator Drain Plug

    Allis-Chalmers
    $4.00
    AB-209D
    Radiator, hydraulic, and block drain plug with broad tractor fitment. Thread size is 1/4" - 18 NPT.Part Number: AB-209DFitsAllis Chalmers: IB, B, C, RC, CA, WC, WF, WD, WD45, D10, D12, D14, D15, D17,...
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  • Allis-Chalmers Radiator Cap Allis Chalmers Case

    Allis-Chalmers Case Radiator Cap

    Allis-Chalmers
    $24.75
    AC-209D
    Chrome-plated radiator cap for select Allis-Chalmers and Case tractors and equipment. For pressurized systems and listed for the applications below.Part Number: AC-209DFitsAllis Chalmers - CA, D10,...
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  • Allis-Chalmers Fuel Cap for D21, 190, 190XT, 200, 210, 220 tractors, circular metal fuel cap with a central locking mechanism.

    Allis Chalmers Fuel Cap for D21, 190, 190XT, 200, 210, 220

    Allis-Chalmers
    $29.75
    AC-336D
    Fuel cap for select Allis-Chalmers tractors. Fits listed D21, 190, 190XT, 200, 210, 220, and 7000-series models.Includes gasket. Condition: New.Part Number: AC-336DFitsAllis Chalmers - D21, 190,...
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  • Allis-Chalmers Fuel Cap Gasket for Allis-Chalmers D21, 7000 Series, close-up of the rubber gasket used for sealing the fuel cap on vintage Allis-Chalmers tractors.

    Fuel Cap Gasket for Allis-Chalmers D21, 7000 Series

    Allis-Chalmers
    $5.75
    AB-1221D
    Fuel cap gasket for listed Allis-Chalmers, Case, International, and John Deere models. Cork construction with measured inside and outside diameters listed below.Part Number: AB-1221DFitsAllis...
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