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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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  • Allis-Chalmers ALTERNATOR PULLEY 2-1/2" OD 5/8" belt width

    Allis-Chalmers Alternator Pulley 2-1/2" OD 5/8" Belt Width

    Allis-Chalmers
    $23.95
    AB-495D
    Alternator pulley for the listed tractor applications. Same applications as part number AB-418D alternator.Part Number: AB-495DFitsAllis ChalmersCaseCockshuttFordIH / FarmallJohn DeereMassey...
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  • Allis-Chalmers Universal Alternator Mounting Bracket Kit

    Universal Alternator Mounting Bracket Kit

    Allis-Chalmers
    $44.75
    AB-404D
    Universal alternator mounting bracket kit for switching from a generator to an alternator. May have to be drilled or modified for your application.Part Number: AB-404DFitsAllis...
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  • Allis-Chalmers Raincap 1 1/4" - 1 7/16" I.D., a metal raincap with bolts and a latch for secure fit.

    Allis Chalmers Raincap 1 1/4" - 1 7/16" I.D.

    Allis-Chalmers
    $9.50
    RC-002D
    Part Number: RC-002DOverviewRaincap with 1 1/4" - 1 7/16" I.D. for the listed tractor applications.FitsAllis ChalmersCaseCockshuttDavid BrownFordIH / FarmallJohn DeereMassey FergusonOliverSpecsInside...
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  • Allis-Chalmers Raincap 2 1/2" - 2 11/16" I.D., metallic raincap with mounting bracket and hinges.

    Allis-Chalmers Raincap 2 1/2" - 2 11/16" I.D.

    Allis-Chalmers
    $11.25
    ACR1802
    Raincap with 2 1/2" - 2 11/16" I.D. Listed for select Allis-Chalmers and other tractor brands below.Part Number: ACR1802FitsAllis ChalmersCaseCockshutt: CO-OP E4, E5Cockshutt 40, 50, 560, 570 GOLDEN...
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  • Allis-Chalmers RAINCAP 2-1/2 in OD Zinc-Plated, metal rain cap for industrial or agricultural applications.

    RAINCAP 2-1/2 in OD Zinc-Plated

    Allis-Chalmers
    $34.50
    RC-014D
    RAINCAP with 2-1/2" OD zinc-plated construction.Fits straight chrome pipe applications.Part Number: RC-014DFitsAllis ChalmersFordIH / FarmallJohn DeereStraight chrome pipeSpecs2-1/2" ODZinc-plated
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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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  • 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 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 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 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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