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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 round tachometer operation meter display for Allis-Chalmers D21 farm tractors, featuring black background with white and orange markings, and a digital hour counter at the bottom.

    Allis-Chalmers D21 Tachometer Operation Meter (Display)

    Allis-Chalmers
    $158.50
    700
    Tachometer operation meter for Allis-Chalmers D21 tractors. Listed with replacement number 239730 and tach-with-bracket assembly number 70239731. Part Number: AC-278D Fits Allis Chalmers...
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  • Allis-Chalmers Upper Seat Spacer Pivot Bushing 70227915, display image of a blue cylindrical metal bushing with some rust and wear.

    Allis-Chalmers Upper Seat Spacer Pivot Bushing 70227915 (Display)

    Allis-Chalmers
    $11.00
    681
    Upper seat spacer, pivot for shock absorber for Allis-Chalmers tractors. Sold individually; 2 per tractor. Part Number:...
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  • Grill Hood Locking Latch Kit for Allis-Chalmers D21, 160-210, display showing metal latch assembly with locking mechanism and small metal bracket on brown background

    Grill Hood Locking Latch Kit for Allis-Chalmers D21, 160-210 (Display)

    Allis-Chalmers
    $15.50
    651
    Grill hood locking latch kit for listed Allis-Chalmers tractors. Includes latch and loop, with a built-in lock for added security. Part Number: 70243274LOCK Fits Allis Chalmers D21 Allis Chalmers...
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  • Hood Latch Snap Latch for Allis Chalmers D10 D12 D14 D15 D17 D19 D21, metallic hood latch snap fitting on brown background

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

    Allis-Chalmers
    $9.50
    650
    Part Number: CH4000 Hood Latch Snap Latch Hood latch snap latch for select Allis Chalmers tractors, bale throwers, balers, and some Gleaner combines. Strike not included. Fits ALLIS CHALMERS - D10,...
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  • Allis Chalmers D10 D12 D14 D15 D17 D19 D21 Hood Latch, used display part for tractor hood latch replacement.

    Allis Chalmers D10 D12 D14 D15 D17 D19 D21 Hood Latch (Display)

    Allis-Chalmers
    $9.50
    649
    Part Number: CH4009 Allis Chalmers Hood Latch Loop-style snap hood latch for the Allis Chalmers tractors and Gleaner combines listed below. Fits Allis Chalmers D10 Allis Chalmers D12 Allis Chalmers...
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  • Voltage Regulator for Allis-Chalmers 190XT D21 160 185 200 170 175 180 190 210 220, black electrical component with mounting brackets on a brown background.

    Voltage Regulator for Allis-Chalmers 190XT D21 160 185 200 170 175 180 190 210 220 (Display)

    Allis-Chalmers
    $29.50
    636
    12 volt voltage regulator for Allis-Chalmers tractors, for the models listed below. Part Number: AB-1148D Fits Allis-Chalmers: 190XT, D21, 160, 185, 200 (with factory alternator), 170, 175, 180,...
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  • Allis Chalmers Amp Gauge 60-0-60 70254407, display of a round amp gauge with a needle, black casing, and a white faceplate marked with ampere measurements.

    Allis Chalmers Amp Gauge 60-0-60 70254407 (Display)

    Allis-Chalmers
    $35.50
    628
    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: DJS70254407 Fits Allis Chalmers D10 Allis Chalmers...
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  • Ammeter 60-0-60 AMP Gauge 2-inch Diameter (Display), round analog current meter for measuring electrical current with black face and red needle.

    Ammeter 60-0-60 AMP Gauge 2" Dia (Display)

    Allis-Chalmers
    $18.50
    627
    Universal 60-0-60 AMP ammeter gauge with a 2" dia. hole fitment. Condition: New. Part Number: AMG60 Fits Allis Chalmers - 160, 170, 175, 180, 185, 190, 190XT, 200, 210, 220, 2RCP, 4650, 4660,...
    Out of stock
  • Allis-Chalmers Engine Oil Pressure Switch D21 180 185 190 190XT 190XT III 200 210 220, display image of a used engine oil pressure switch with metallic body, threaded end, and electrical contact.

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

    Allis-Chalmers
    $16.00
    608
    Part Number: 74021445 Allis-Chalmers Engine Oil Pressure Switch Engine oil pressure switch for listed tractors and combines. Fits Allis Chalmers - D21, 180, 185, 190, 190XT, 190XT III, 200, 210,...
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  • Temperature Sending Unit for Allis-Chalmers D21, 170-7000 with display, metal sensor with threaded end, blue ring, and electrical connection

    Temperature Sending Unit for Allis-Chalmers D21, 170-7000 (Display)

    Allis-Chalmers
    $15.75
    602
    Temperature Sending Unit for Allis Chalmers tractors. Part Number: 70241249 Fits D21, 170, 175, 180, 185, 190, 190XT, 190XT III, 200, 210, 220, 220 FWA, 7000 Replaces / Cross Reference 70241249,...
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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)

    Allis-Chalmers
    $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)

    Allis-Chalmers
    $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)

    Allis-Chalmers
    $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 Case Radiator Cap, used display part shown on a beige background with a label marked 530 and barcode.

    Allis-Chalmers Case Radiator Cap (Display)

    Allis-Chalmers
    $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,...
    Out of stock
  • 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)

    Allis-Chalmers
    $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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  • 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)

    Allis-Chalmers
    $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 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)

    Allis-Chalmers
    $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 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)

    Allis-Chalmers
    $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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