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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 TRIPLE RIB 6 PLY TIRE - 5.00 X 15 6 PLY

    Triple Rib 6 Ply Tire 5.00 x 15 for Allis-Chalmers

    Allis-Chalmers
    $99.75
    WH-052D
    Triple rib 6 ply tire sized 5.00 x 15. Tire only and for 3 x 15 wheel, with fitment listed for multiple tractor brands.Part Number: WH-052DFitsAllis ChalmersAveryCaseCockshuttIH / FarmallJohn...
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  • Allis-Chalmers Allis Chalmers Gear Shift Boot D17 D19 D21 170 175 210 220 70233767 233767

    Allis-Chalmers Gear Shift Boot

    Allis-Chalmers
    $12.00
    AC-256D
    Rubber gear shift / shifter boot for Allis-Chalmers tractors.Part Number: AC-256DFitsAllis Chalmers D17Allis Chalmers D19Allis Chalmers D21Allis Chalmers 170Allis Chalmers 175Allis Chalmers 210Allis...
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  • Allis-Chalmers Allis Chalmers Black Steering Wheel ED40 D10 D12 D14 D15 D17 D19 D21

    Allis Chalmers Black Steering Wheel

    Allis-Chalmers
    $57.50
    AC-134D
    Black steering wheel for listed Allis-Chalmers tractors and combines. Like original and made with all new material.Part Number: AC-134DFitsAllis Chalmers - ED40, D10, D12, D14 (sn 19001 and up), D15,...
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  • Allis-Chalmers Allis Chalmers Cream Steering Wheel ED40 D10 D12 D14 D15 D17 D19 D21

    Allis Chalmers Cream Steering Wheel

    Allis-Chalmers
    $57.75
    AC-137D
    Cream steering wheel for listed Allis-Chalmers tractors and combines. Like original and made with all new material.Part Number: AC-137DFitsAllis Chalmers - ED40, D10, D12, D14 (sn 19001 and up), D15,...
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  • Allis-Chalmers Tractor Steering Wheel Nut, black metal hex nut with internal threading for steering wheel attachment.

    Allis-Chalmers Tractor Steering Wheel Nut 70208584 70252471

    Allis-Chalmers
    $6.25
    AB-504D
    Steering wheel nut for Allis-Chalmers and listed Case, IH/Farmall, Massey Ferguson, MM, Oliver, and White applications. Confirm fitment against the tractor model and listed power steering or steering...
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  • Allis-Chalmers Gear Shift Knob, black rubber gear shift knob for tractor or equipment

    Allis-Chalmers Gear Shift Knob

    Allis-Chalmers
    $6.75
    AC-202D
    Allis-Chalmers gear shift knob with the listed model applications and cross references below.Part Number: AC-202DFitsAllis Chalmers B (sn 120982 and up)Allis Chalmers IB (sn 26006 and up)Allis...
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  • Allis-Chalmers Plastic Knob 70242338, black plastic replacement knob with mounting holes.

    Plastic Knob 70242338

    Allis-Chalmers
    $5.95
    AB-362D
    Plastic knob with the listed tractor applications, size, and cross references below.Part Number: AB-362DFitsAllis Chalmers 190XT (Series III up to SN: 14186 PTO without clutch, throttle lever...
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  • Allis-Chalmers Allis Chalmers Seat Shock Absorber with Spring D14 D15 D17 D19 170 180 190 200 210 220

    Allis Chalmers Seat Shock Absorber with Spring

    Allis-Chalmers
    $111.75
    AC-219D
    Seat shock absorber with spring for listed Allis-Chalmers tractor models. Replacement numbers 227917 (spring) and 227916 (shock) are provided.Part Number: AC-219DFitsAllis Chalmers: D10, D12, D14,...
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  • Allis-Chalmers Seat Shock Absorber Fits Monroe Seat, black automotive shock absorber for seat suspension.

    Seat Shock Absorber Fits Monroe Seat

    Allis-Chalmers
    $48.75
    IH-329D
    The only newly manufactured oil-filled seat shock available. Competing products use air shocks built for automotive suspension, not tractors.Direct-fit rear seat shock absorber for tractors equipped...
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  • Allis-Chalmers Rubber Seat Shock Bushing Allis Chalmers

    Rubber Seat Shock Bushing Allis Chalmers

    Allis-Chalmers
    $2.25
    IH-325D
    Rubber seat shock bushing for listed tractor models. Sold individually and used on Monroe Easy-Ride seat and Float Ride seat applications where noted.Part Number: IH-325DFitsAllis Chalmers: B, C, CA,...
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  • Allis-Chalmers Seat Cushion Assembly for D10 D12 D14 D15 D17 D19 D21, cushioned tractor seat with white and black upholstery.

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

    Allis-Chalmers
    $499.75
    AC-221D
    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, black and white tractor seat cushion with ergonomic design.

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

    Allis-Chalmers
    $219.50
    AC-222D
    Restoration quality back rest seat cushion for select Allis-Chalmers tractors. Cushion is embossed like original and made in the USA.Part Number: AC-222DFitsD10D12D14D15D17D19D21170, 175, 180, 185,...
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  • Allis-Chalmers Bottom Seat Cushion for D10 D12 D14 D15 D17 D19 D21, black and white upholstered tractor seat cushion.

    Allis-Chalmers Bottom Seat Cushion for D10 D12 D14 D15 D17 D19 D21

    Allis-Chalmers
    $249.75
    AC-223D
    Restoration quality bottom seat cushion for select Allis-Chalmers tractors. Cushion is embossed like original and made in the USA.Part Number: AC-223DFitsD10D12D14D15D17D19D21170, 175, 180, 185, 190,...
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  • Allis-Chalmers Ignition Key Switch, metallic ignition switch with attached key for industrial machinery

    Allis Chalmers Ignition Key Switch

    Allis-Chalmers
    $39.75
    AC-288D
    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 Ignition Key Allis Chalmers Oliver Case 72162639

    Ignition Key for Allis-Chalmers, Oliver, Case 72162639

    Allis-Chalmers
    $5.25
    KY-01D
    Ignition key with brass finish for listed Allis-Chalmers, Oliver, Case, Cockshutt, IH, Farmall, and White models.Fits listed models using Delco switch.Part Number: KY-01DFitsAllis Chalmers: D10, D12,...
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  • Allis-Chalmers Ignition Switch 4 Position Key Switch

    4 Position Ignition Switch with 2 Keys

    Allis-Chalmers
    $19.75
    AB-400D
    4-position ignition switch for AG and light industrial equipment.Includes 2 keys.Part Number: AB-400DFitsAllis ChalmersAveryCaseCockshuttDavid BrownFordIH / FarmallJohn DeereMassey FergusonMassey...
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  • Allis-Chalmers Cork / Rubber Rollpack Gasket Material, cylindrical rolled gasket with cork and rubber composition for industrial sealing applications.

    Cork / Rubber Rollpack Gasket Material

    Allis-Chalmers
    $14.00
    AB-1830D
    Cork / Rubber Rollpack Gasket Material for making multi-purpose gaskets. USA made and sold as a 12" x 24" sheet.Part Number: AB-1830DFitsAllis ChalmersAveryCaseCockshuttFordIH / FarmallJohn...
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  • Allis-Chalmers Cork Rubber Gasket Material Roll, cylindrical brown gasket material roll with a smooth surface.

    Cork Rubber Gasket Material Roll

    Allis-Chalmers
    $16.75
    AB-1835D
    Cork Rubber Gasket Material Roll for making your own general purpose gaskets. USA made and supplied as a 12" x 24" sheet.Part Number: AB-1835DFitsAllis ChalmersAveryCaseCockshuttFordIH / FarmallJohn...
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