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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 Front Wheel Lug Bolt Rear Rim Lug Bolt

    Front Wheel Lug Bolt Rear Rim Lug Bolt

    Allis-Chalmers
    $3.00
    AB-399D
    Front wheel lug bolt / rear rim lug bolt. New, zinc-coated bolt with listed model applications and replacement numbers below.Part Number: AB-399DFitsAllis Chalmers: B, C, CA, RC, WC, WD, WD45, G,...
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  • Allis-Chalmers Tire 6.00 x 16 Triple Rib 4 Ply, black rubber tractor tire with a triple rib tread pattern for Allis-Chalmers equipment.

    Tire 6.00 x 16 Triple Rib 4 Ply for Allis-Chalmers

    Allis-Chalmers
    $119.75
    WH-048D
    Tire only, 6.00 x 16" triple rib 4 ply. Fitment is listed for Allis-Chalmers and several other tractor brands.Part Number: WH-048DFitsAllis ChalmersAveryCaseCockshuttFordIH / FarmallJohn DeereMassey...
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  • Allis-Chalmers Tire 5.50 x 16 Triple Rib 6 Ply for Allis-Chalmers, black tire with triple rib tread pattern, designed for durable performance on agricultural equipment.

    Tire 5.50 x 16 Triple Rib 6 Ply for Allis-Chalmers

    Allis-Chalmers
    $104.75
    WH-047D
    Triple rib 6 ply tire sized 5.50 x 16. Fitment is listed for Allis-Chalmers and several other tractor brands.Part Number: WH-047DFitsAllis ChalmersAveryCaseCockshuttFordIH / FarmallJohn DeereMassey...
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  • Allis-Chalmers TUBE ONLY 6.5 x 16 - WH-050D, black tractor tire tube with a curved shape and detailed tread pattern.

    Tube Only 6.5 x 16

    Allis-Chalmers
    $19.75
    WH-050D
    Tube only 6.5 x 16" for 5.50, 6.00, and 6.50 x 16" tires.Fits a range of tractor brands listed below and cross references to WHS050.Part Number: WH-050DFitsAllis ChalmersAveryCaseCockshuttFordIH /...
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  • Allis-Chalmers 3 Rib 6.50 x 16 Tire, black rubber agricultural tractor tire with three rib tread design.

    3 Rib 6.50 x 16 Tire

    Allis-Chalmers
    $129.50
    WH-049D
    3 rib 6.50 x 16 tire with triple rib 6 ply construction.Fitment is listed for multiple tractor brands and cross references to whs049.Part Number: WH-049DFitsAllis ChalmersAveryCaseCockshuttFordIH /...
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  • Allis-Chalmers Tube 4.00, 5.00, 5.50 X 15" tire tube, black rubber inner tube for tractor or machinery wheel.

    Tube 4.00, 5.00, 5.50 x 15 for Allis-Chalmers

    Allis-Chalmers
    $18.00
    WH-053D
    New tube for 4.00, 5.00, 5.50 x 15" tires. Fitment is listed for Allis-Chalmers and several other tractor brands.Part Number: WH-053DFitsAllis ChalmersAveryCaseCockshuttIH / FarmallJohn DeereMassey...
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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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