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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 Brake Pedal Return Spring 70227700, black coiled metal spring with hooks on both ends

    Allis Chalmers Brake Pedal Return Spring 70227700

    Allis-Chalmers
    $14.75
    70227700
    Part Number: 70227700Allis Chalmers Brake Pedal Return SpringBrake pedal return spring for Allis Chalmers tractors. Used as a clutch pedal return spring on the D21.FitsAllis Chalmers D10Allis...
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  • Allis-Chalmers BRAKE SHOE LINING SET Allis Chalmers D17 D19 D21 170 175 180 185 190

    Allis-Chalmers Brake Shoe Lining Set ACR3539

    Allis-Chalmers
    $21.50
    ACR3539
    OverviewBrake shoe lining set for Allis-Chalmers tractors. Includes 2 linings with rivets for 1 wheel only. Size is 1.25" W x 7.25" L.FitsAllis-Chalmers D17 (sn 42001 and up)Allis-Chalmers...
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  • Allis-Chalmers Universal 2 Position Push/Pull Light Switch, 30 Amp, industrial electrical switch with black knob and metal contacts for machinery control.

    Universal 2 Position Push/Pull Light Switch, 30 Amp

    Allis-Chalmers
    $9.75
    AB-398D
    Universal 2 position push/pull light switch for AG and light industrial equipment. This is a 30 amp switch for battery ignition systems only.Includes a plastic knob. Knob color and style may vary...
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  • Allis-Chalmers Universal 3 Position Push/Pull Light Switch - JD-631D, electrical switch with metal and plastic components and a black toggle handle.

    Universal 3 Position Push/Pull Light Switch - JD-631D

    Allis-Chalmers
    $14.75
    JD-631D
    Universal 3 Position Push/Pull Light Switch - JD-631DThis universal 3 position push/pull light switch is rated for 15 amps and uses 5 terminals. It includes the black plastic knob.FitsAllis...
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  • Allis-Chalmers WICO Magneto Service Manual Instructions & Parts List, manual cover with illustrations of magneto models XH and XHD and table of contents.

    WICO Magneto Service Manual Instructions & Parts List

    Allis-Chalmers
    $15.75
    WICO6
    Reprint service manual for WICO magnetos. This book includes assembly and disassembly instructions plus exploded parts views with numbered illustrations for easier reference.Useful for identifying...
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  • Allis-Chalmers Allis Chalmers 2-Position Light Switch D10 D12 D14 D15 D17 D19 D21 190 190XT

    Allis-Chalmers 2-Position Light Switch AC-290D 228330

    Allis-Chalmers
    $29.75
    AC-290D
    Allis-Chalmers 2-Position Light SwitchPart Number: AC-290DThis D Series 2-position light switch is listed for the tractor models below and uses 2 spade terminals.FitsAllis Chalmers - D10, D12, D14,...
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  • Allis-Chalmers Fairbanks Morse Magneto End Cap for FM Series, black metal component with four brown insulator sections for electrical connections.

    Fairbanks Morse Magneto End Cap for FM Series

    Allis-Chalmers
    $89.75
    FM142
    Part Number: FM142Fairbanks Morse Magneto End CapEnd Cap - FAIRBANKS MORSE MAGNETO (FM Series) - FM142 for listed Allis Chalmers and Minneapolis Moline applications.FitsAllis Chalmers - various...
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  • Allis-Chalmers FM Series Coil FM170, industrial coil with orange plastic casing, black wiring, and metal connectors for electrical connections.

    Allis-Chalmers FM Series Coil FM170

    Allis-Chalmers
    $79.75
    FM170
    Allis-Chalmers FM Series Coil FM170Part Number: FM170This coil is for FM Series magneto applications listed below. Use the part number and magneto model to confirm fitment before ordering.FitsAllis...
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  • Allis-Chalmers FM Series Rotor FM147, agricultural machinery part with black housing and brass contact plates used in farming equipment.

    Allis-Chalmers FM Series Rotor FM147

    Allis-Chalmers
    $17.75
    FM147
    Allis-Chalmers FM Series Rotor FM147Part Number: FM147Rotor for the FM Series magneto applications listed below. Check the model list carefully to confirm compatibility.FitsAllis Chalmers - Various...
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  • Allis-Chalmers Ignition Tune-Up Kit W/ Rotor (Delco Distributor), automotive ignition components including rotor, condenser, and mounting hardware.

    Ignition Tune-Up Kit W/ Rotor for Delco Distributor ACR1932

    Allis-Chalmers
    $13.75
    ACR1932
    Ignition Tune-Up Kit W/ Rotor for Delco DistributorThe Ignition Tune-Up Kit W/ Rotor (For Delco) - ACR1932 includes a point set, a vibration-resistant condenser, and a rotor button.It is made for...
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  • Allis-Chalmers Point Set - R2437, FM-J, FM-J4, FM-J4A, FM-J4B, FM-JE, JM-JG, FM-T, FMJ4-B3

    Fairbanks Morse Point Set for FM-J, FM-J4, FM-JE

    Allis-Chalmers
    $19.50
    FM154
    Part Number: FM154Point Set for Fairbanks Morse MagnetosPoint Set - FM154 for Fairbanks Morse magnetos. Replaces Fairbanks Morse part R2437 and is listed for clockwise rotation applications.FitsAllis...
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  • Allis-Chalmers Fairbanks Morse FMJ FMX Magneto Condenser

    Fairbanks Morse FMJ FMX Magneto Condenser

    Allis-Chalmers
    $11.75
    FM110
    Part Number: FM110Fairbanks Morse FMJ FMX Magneto CondenserFM110 is a condenser for Fairbanks Morse FMJ and FMX magnetos. It is listed as new and replaces OEM part AXMR2433.FitsFairbanks Morse...
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  • Allis-Chalmers Tie Rod Dust Boot, black rubber dust cover for allis chalmers G 70800442 tractor parts.

    Allis-Chalmers Tie Rod Dust Boot FD-336D 70800442

    Allis-Chalmers
    $4.95
    FD-336D
    Allis-Chalmers Tie Rod Dust Boot FD-336D 70800442This tie rod dust boot is listed as serviceable for Allis-Chalmers G and includes universal applications shown below. Dimensions and cross references...
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  • Allis-Chalmers D21 210 220 Tie Rod Boot 70239467, black rubber protective boot for tractor tie rod assembly.

    Allis-Chalmers D21 210 220 Tie Rod Boot 70239467

    Allis-Chalmers
    $14.95
    AC-320D
    Tie rod boot for Allis-Chalmers D21, 210, and 220 tractors. Replaces 70239467 and 239467.Use the dimensions below to confirm fit before ordering. 4 boots are required per tractor.Part Number:...
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  • Allis-Chalmers Tie Rod Boot - JD-736D, black rubber automotive part with a wide base and a hollow cylindrical opening.

    Tie Rod Boot JD-736D

    Allis-Chalmers
    $4.95
    JD-736D
    Tie Rod Boot JD-736DNew tie rod boot with the dimensions listed below. Review the fitment and replacement numbers carefully before ordering.FitsListed fitment includes:Allis...
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  • Allis-Chalmers Tie Rod Boot FD-337D, black rubber protective cover for tie rod.

    Allis-Chalmers Tie Rod Boot FD-337D

    Allis-Chalmers
    $4.95
    FD-337D
    OverviewUniversal tie rod boot FD-337D for Allis-Chalmers and other tractor applications. This black rubber protective boot is listed with multiple brand and model fitments...
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  • Allis-Chalmers Universal Tie Rod Boot AB-371D, black rubber automotive part for steering components.

    Universal Tie Rod Boot

    Allis-Chalmers
    $4.95
    AB-371D
    Part Number: AB-371DProduct OverviewUniversal tie rod boot with listed applications on multiple makes.FitsAllis ChalmersAveryCaseCockshuttFordIH / FarmallJohn Deere<
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  • Allis-Chalmers Slip Fit Coupler for tractors, cylindrical metal part with holes for U-joint attachment.

    Slip Fit Coupler for Tractor Steering Shaft, AB-380D

    Allis-Chalmers
    $109.75
    AB-380D
    Slip fit coupler for tractor steering shafts when a U-joint is needed. Original style part. Use this coupler where the steering shaft requires a universal joint connection.Part number:...
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