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Allis Chalmers D21 Tractor Parts

About the Allis-Chalmers D21

The D21 was introduced in 1963 as the largest tractor in the D Series. It used a large six-cylinder diesel, power steering, an independent 1,000-rpm PTO, and the size and weight needed for large field work.

The D21 was built from 1963 through 1969 in Series I and Series II versions. The serial number table shows the change from Series I to Series II during the 1965 production run.

Serial Number Reference

Serial number locations: The tractor serial number is stamped on the left side, on the front flange of the torque housing near the starter mounting. The engine serial number is stamped on a plate at the upper rear of the engine block on the left-hand side.

The table below shows the beginning tractor serial number for each Model D21 year and series:

 

1963-1965
Model D21 year Beginning serial number
1963 - Series I 100
1964 - Series I 1,417
1965 - Series I 2,079
1965-1967
Model D21 year Beginning serial number
1965 - Series II 2,130
1966 - Series II 2,408
1967 - Series II 2,863
1968-1969
Model D21 year Beginning serial number
1968 - Series II 3,777
1969 - Series II 4,498

Total production: 2,409 Model D21 tractors.

Allis-Chalmers D21 Paint Reference

For restoration planning, the Allis-Chalmers D21 is listed in the Allis-Chalmers tractor paint guide with the original paint references below.

Allis-Chalmers D21 paint reference by production period
Production period Metal Wheels Disc Chassis Trim
1961 through 1977 Persian Orange 2 Cream, Persian Orange 2 Cream, Aluminum Persian Orange 2 Cream, Chrome grille

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

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  • A circular input shaft seal for Allis-Chalmers D21 tractor, with a golden outer ring and a black inner seal.

    Allis Chalmers D21 Input Shaft Seal

    Allis-Chalmers
    $12.00
    70238918
    Allis Chalmers D21 input shaft seal.Part Number: 70238918FitsAllis Chalmers D21Replaces / Cross Reference70238918238918Specs2.125 inches inside diameter3.001 inches outside diameter0.434 inches wide
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  • A metallic plunger primer bail assembly for Allis-Chalmers farm tractors, with a knurled cylindrical component and a U-shaped metal wire attached.

    Plunger Primer Bail Assembly Allis Chalmers D15 D21 180 185 190 190XT 190XT III 200 210 220 7000 7010 7020 7030 7040 7045 7050 7060 7080 7580

    Allis-Chalmers
    $57.75
    74050646
    Bail assembly for fuel primer / plunger applications on select Allis Chalmers tractors.Part Number: 74050646FitsAllis Chalmers D15Allis Chalmers D21Allis Chalmers 180Allis Chalmers 185Allis Chalmers...
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  • A complete wiring harness for Allis-Chalmers D21 Series I & II farm tractors, consisting of various wires with connectors and labels, laid out in a tangled fashion.

    Complete Wiring Harness for Allis Chalmers D21 Series I & II

    Allis-Chalmers
    $748.00
    DJSD21050
    Complete wiring harness for Allis Chalmers D21 Series I and Series II.Part Number: DJSD21050FitsAllis Chalmers D21 Series IAllis Chalmers D21 Series IIReplaces / Cross...
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  • A white amp gauge with black markings, showing a range from 0 to 60 Amperes, used for Allis-Chalmers farm tractors. The gauge has the text "ALLIS-CHALMERS" at the bottom center and "AMPERES" at the top, with a needle pointing to just below 60.

    Allis Chalmers Amp Gauge 60-0-60 70254407

    Allis-Chalmers
    $44.50
    DJS70254407
    Aftermarket 60-0-60 gauge made just like the original ones that came on the tractor when new. Made to give it that original look.Part Number: DJS70254407FitsAllis Chalmers D10Allis Chalmers D12Allis...
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  • A water temperature gauge for Allis-Chalmers farm tractors. The gauge displays the water temperature with a needle pointing to a position on a dial. The dial has a color-coded section indicating safe (white and green) and warning (red) temperature ranges. The face of the gauge is marked with 'WATER TEMPERATURE' and 'ALLIS-CHALMERS' in the center.

    Allis Chalmers Water Temperature Gauge

    Allis-Chalmers
    $51.50
    DJS70240989
    Aftermarket water temperature gauge made just like the original ones that came on the tractor when new. Made to give it that original look. Part Number: DJS70240989 Fits Allis Chalmers 175...
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  • Round Allis-Chalmers tractor fuel gauge with a chrome-colored bezel, white dial marked FUEL LEVEL, E, 1/2, and F, a red low-fuel segment, and a black needle pointing near empty.

    Allis Chalmers Fuel Gauge

    Allis-Chalmers
    $51.50
    DJS70240988
    Aftermarket fuel gauge made just like the original ones that came on the tractor when new. Made to give it that original look. Part Number: DJS70240988 Fits Allis Chalmers D21 Allis Chalmers...
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  • A complete seat assembly designed for Allis-Chalmers farm tractors, featuring black and white colored upholstery with a cushioned seat and backrest.

    Allis Chalmers Complete Seat Assembly

    Allis-Chalmers
    $365.00
    DJS221
    Complete seat assembly for select Allis Chalmers tractors. Includes a metal seat pan and seat cushions with wood backing.This seat assembly is a great seat option at a fraction of the cost.Part...
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  • A grey, circular front wheel hub assembly with eight bolt holes and a central bearing, designed for Allis-Chalmers farm tractors.

    Allis-Chalmers 8 Lug Front Wheel Hub Assembly 70265167

    Allis-Chalmers
    $131.75
    70265167
    Allis-Chalmers - D21, 210, 220, 7000, 7010, 7020, 7030, 7040, 7045, 7050, 7060, 7080, 8010, 8030, 8050, 8070Front wheel hub assembly, 8 lug.Part Number:...
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  • A metal gasket with four holes surrounding a larger central hole, designed for Allis-Chalmers farm tractors, specifically for the Turbo Elbow.

    Allis-Chalmers Turbo Elbow Gasket 74338943

    Allis-Chalmers
    $18.75
    74338943
    Turbo elbow gasket for select Allis-Chalmers tractors. New condition.Part Number: 74338943FitsAllis Chalmers D19Allis Chalmers D21Allis Chalmers 190Allis Chalmers 200Allis Chalmers 210Allis Chalmers...
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  • A cylindrical grey bushing with a hollow center, designed for Allis-Chalmers farm tractors. The product is identified as Upper Seat Spacer Pivot Bushing with the part number 70227915.

    Allis-Chalmers Upper Seat Spacer Pivot Bushing 70227915

    Allis-Chalmers
    $13.75
    70227915
    Upper seat spacer, pivot for shock absorber for Allis-Chalmers tractors.Sold individually; 2 per tractor.Part Number: 70227915FitsD10D12D14D15D17D19D21170175180185190190XT200210220Replaces / Cross
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  • Image of an Allis-Chalmers D21 PTO Oil Seal, a round mechanical component with a black inner ring and a teal outer ring.

    Allis-Chalmers D21 PTO Oil Seal

    Allis-Chalmers
    $19.75
    70240315
    Part Number: 70240315Allis-Chalmers D21 PTO Oil SealPTO oil seal for the Allis-Chalmers D21 tractor.FitsAllis-Chalmers D21Replaces / Cross Reference70240315240315Ordering NotesMatch the gasket or...
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  • A metal seat frame lower linkage assembly for Allis-Chalmers D-Series farm tractors, silver in color and elongated with two holes at one end and a cylindrical attachment point at the other.

    Allis Chalmers D-Series Seat Frame Lower Linkage Assembly

    Allis-Chalmers
    $119.50
    70233327
    Allis Chalmers D-Series Seat Frame Lower Linkage Assembly for D10-220 models.Part Number: 70233327FitsAllis Chalmers D10Allis Chalmers D12Allis Chalmers D14Allis Chalmers D15Allis Chalmers D17Allis...
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  • A universal 2-position push-pull switch designed for Allis-Chalmers farm tractors, not for automobiles.

    Universal 2 Position Push Pull Switch

    Allis-Chalmers
    $13.50
    DJS398
    Universal 2 position push pull switch for agricultural and light industrial equipment. For ignition switch applications, it can be used only on battery ignition systems.Switch is a 10amp switch with...
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  • A metallic flexible choke cable with a round black knob at one end, labeled 'CHOKE,' designed for Allis-Chalmers farm tractors.

    Universal Choke Cable 64"

    Allis-Chalmers
    $19.75
    AC-17033019
    Universal Choke Cable with 64" metal sheathed cable length.Part Number: AC-17033019FitsAllis Chalmers - variousCase - variousCockshutt - variousFord - variousIH / Farmall - Hydro 70, Hydro 86, 300,...
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  • Two brass fuel line adapter fittings with threaded ends, designed for Allis-Chalmers farm tractors, not made for automobiles.

    Fuel Line Adapter Fitting

    Allis-Chalmers
    $5.00
    AB-4285D
    Fuel Line Adapter Fitting for tractors and equipment using 5/16" fuel line.Part Number: AB-4285DFitsAllis Chalmers - various modelsCase - various modelsCockshutt - various modelsInternational :...
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  • A chrome push button starter switch for Allis-Chalmers farm tractors. The switch has a metallic body with threading and a button on the end, designed for specific tractor models like WD45, D15, D17, D19, D21, and various series such as 170, 175, 180, 185, 190, 190XT, 200, 210, 220, 6000, and 7000.

    Chrome Push Button Starter Switch for Allis Chalmers WD45 Diesel D15 D17 D19 D21 170 175 180 185 190 190XT 190XT III 200 210 220 6000 Series 7000 Series

    Allis-Chalmers
    $16.25
    DJS60824
    Chrome push button starter switch for the listed Allis Chalmers tractors and series.Features 5/8" mounting threads.Part Number: DJS60824FitsAllis Chalmers WD45 DieselAllis Chalmers D15Allis Chalmers...
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  • A metal bracket designed for Allis-Chalmers D17 farm tractor, used as a work light or taillight bracket, with a curved shape and a slot for mounting.

    Allis Chalmers Work Light / Taillight Bracket for D17

    Allis-Chalmers
    $75.00
    DJS1211
    Part Number: DJS1211 Allis Chalmers Work Light / Taillight Bracket Bracket for the Allis Chalmers D17 Series I, II, and III. It can also be added to any D Series seat frame for use with Combo Light...
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  • Allis-Chalmers PTO Guard for various Allis-Chalmers farm tractor models, shown as a metal guard with mounting holes.

    PTO Guard for Allis-Chalmers D17 D19 170 175 180 185 190 190XT 200 210 7000

    Allis-Chalmers
    $109.25
    70255996
    PTO Shield / Guard for Allis-Chalmers tractors. New part.Part Number: 70255996FitsAllis Chalmers - D17 (Series IV), D19, 170, 175, 180, 185, 190, 190XT, 200, 210, D21, 220, 7000Replaces / Cross...
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