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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.

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  • Allis Chalmers Ignition Key Switch, used display with metal key and electrical connectors

    Allis Chalmers Ignition Key Switch (Display)

    $31.75
    584
    Ignition key switch for select Allis Chalmers tractors and related applications. 5 spade terminals with screws, .995" diameter threaded end, OEM style Delco Remy. Includes jam nut and 2 keys. 4...
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  • Allis-Chalmers 2-Position Light Switch AC-290D 228330, display view of used electrical switch part lying on brown surface with a white label underneath.

    Allis-Chalmers 2-Position Light Switch AC-290D 228330 (Display)

    $23.75
    578
    Allis-Chalmers 2-Position Light Switch Part Number: AC-290D This D Series 2-position light switch is listed for the tractor models below and uses 2 spade terminals. Fits Allis Chalmers - D10, D12,...
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  • 4409X Sealed Beam Combination Rear Light Bulb 12V, round with reflective surface, for vehicle signaling, on display.

    4409X Sealed Beam Combination Rear Light Bulb 12V (Display)

    $16.00
    574
    Part Number: IH-899D Fits Allis Chalmers: D10, D12, D15, D17, D19, D21, 160, 170, 175, 180, 185, 190, 190XT, 200, 210, 220, 5040, 6040, 7030, 7040, 7050, 7060, 7080 Avery Case Cockshutt: models with...
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  • Allis Chalmers 12V Sealed Beam Combo Tail Light Assembly, display image of a round black and clear sealed beam tail light with wiring, used for agricultural or industrial vehicles.

    Allis Chalmers 12V Sealed Beam Combo Tail Light Assembly (Display)

    $93.50
    566
    Part Number: AC-355D Fits Allis Chalmers: 190XT (up to SN 19000), D10, D12, D15 (SN 9001 & up), D17 (SN 42001 & up), D19, D21, 190 Minneapolis Moline: JetStar 2, Jetstar 3 Super, M5, M504, M602,...
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  • Round Fender and Cab Mount Amber Warning Light, display of the amber warning light with a round, orange lens and mounting hardware.

    Round Fender and Cab Mount Amber Warning Light (Display)

    $15.75
    561
    Round fender and cab mount amber warning light with amber lenses and a black diecast base. Double-contact bulb, 12-volt, 4" lens diameter. Part Number: AB-544D Fits Allis Chalmers: D21, 160, 170,...
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  • Allis Chalmers Fuel Cap for D21, 190, 190XT, 200, 210, 220 with display, close-up image showing metallic fuel cap on a brown background.

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

    $23.75
    541
    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-336D Fits Allis Chalmers - D21, 190,...
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  • Allis-Chalmers Case Radiator Cap, used display part shown on a beige background with a label marked 530 and barcode.

    Allis-Chalmers Case Radiator Cap (Display)

    $19.75
    530
    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-209D Fits Allis Chalmers - CA,...
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  • Allis Chalmers Cream Emblem Steering Wheel Display, vintage Allis Chalmers cream-colored metal emblem with black letters and a diamond-shaped design.

    Allis Chalmers Cream Emblem Steering Wheel (Display)

    $27.50
    526
    Allis Chalmers Cream Emblem Steering Wheel with die cast, chromed finish and cream painted background. Use this emblem on the steering wheel or front grille nose where applicable. Part Number:...
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  • Allis-Chalmers Persian Orange #2 Emblem, a vintage metal display emblem with orange background and silver lettering and border.

    Allis-Chalmers Persian Orange #2 Emblem (Display)

    $27.25
    525
    Persian Orange #2 emblem for select Allis-Chalmers tractors, combines, and lawn and garden models. Part Number: A9902 Fits Allis Chalmers: ED40, D10, D12, D14 (sn 19001 and up), D15, D17 (sn 24001...
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  • Allis Chalmers ED40 D10 D12 D14 D15 D17 D19 D21 Steering Wheel Front Nose Emblem, metallic square emblem with 'A C' logo and 'Allis-Chalmers' text, used parts display.

    Allis Chalmers ED40 D10 D12 D14 D15 D17 D19 D21 Steering Wheel Front Nose Emblem (Display)

    $15.50
    524
    Unpainted steering wheel front nose emblem for listed Allis Chalmers applications. Part Number: ACR3996 Fits Allis Chalmers ED40 Allis Chalmers D10 Allis Chalmers D12 (SN # 19001 and Up) Allis...
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  • Fuel Filter Bail Assembly with Brass Nut, display of used auto part on brown background with label

    Fuel Filter Bail Assembly with Brass Nut (Display)

    $10.00
    500
    Fuel Filter Bail Assembly with Brass Nut - AB-236D for the listed tractor models. New part. Part Number: AB-236D Fits Allis Chalmers: 190XT, D21, U, UC, 190 (2.315 Tall Glass Bowl), D15 (Gas (SN:...
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  • Allis Chalmers Sediment Bowl Assembly, metal and glass sediment bowl with mounting bracket for D15, D17, D19, D21, WD, WD45, 170, 175, 180, 190, and 190XT tractors.

    Allis Chalmers Sediment Bowl Assembly D15 D17 D19 D21 WD WD45 170 175 180 190 190XT (Display)

    $27.75
    498
    Allis Chalmers sediment bowl assembly for the listed tractor models and applications below. Part Number: ACR2406 Fits 190XT, 190 (Gas, Dsl. Using 2.315 Long Glass Bowl) D15 (Gas (SN: 9001 & up) &...
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  • Allis Chalmers Metal Seat Pan for D10, D12, D14, D15, D17, D19, D21, display image of a white metal seat pan with multiple mounting holes and a black handle, used in vintage tractors.

    Allis Chalmers Metal Seat Pan for D10, D12, D14, D15, D17, D19, D21 (Display)

    $150.50
    492
    Allis Chalmers metal seat pan for select tractor models. Made in the USA with a steel frame and restoration-quality construction. Part Number: KM7539 Fits D10 D12 D14 D15 D17 D19 D21 Also fits 170,...
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  • Allis-Chalmers Seat Cushion Assembly for D10 D12 D14 D15 D17 D19 D21, display image showing a black and white cushioned seat with a label on it.

    Allis-Chalmers Seat Cushion Assembly for D10 D12 D14 D15 D17 D19 D21 (Display)

    $399.75
    491
    Restoration quality seat cushion assembly for select Allis-Chalmers tractors. Cushions are embossed like original and include a steel frame, back rest, and bottom cushion. Part Number:...
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  • Allis-Chalmers Back Rest Seat Cushion for D10 D12 D14 D15 D17 D19 D21, top view of a white and black cushioned seat backrest with an orange price tag display.

    Allis-Chalmers Back Rest Seat Cushion for D10 D12 D14 D15 D17 D19 D21 (Display)

    $175.00
    490
    Restoration quality back rest seat cushion for select Allis-Chalmers tractors. Cushion is embossed like original and made in the USA. Part Number: AC-222D Fits D10 D12 D14 D15 D17 D19 D21 170, 175,...
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