Same Day Shipping On 99% Of Orders

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.

Filter By

Sort By:

Display Type:
Filters
  • Allis-Chalmers Starter to Switch Cable, Eyelets at Both Ends, red and silver electrical cable for machinery.

    Starter to Switch Cable, Eyelets at Both Ends

    Allis-Chalmers
    $16.75
    AB-1582D
    Starter to switch cable with eyelets at both ends. New part for various Allis-Chalmers, Case, Cockshutt, Ford, International, John Deere, Massey Ferguson, Massey Harris, Minneapolis Moline, and...
  • Allis-Chalmers Allis Chalmers Seat Bumper 70229703 229703

    Allis Chalmers Seat Bumper 70229703 229703

    Allis-Chalmers
    $15.75
    AC-1891D
    Seat bumper for select Allis Chalmers tractors and industrial models with standard pan style seat. Replaces 70229703 and includes the referenced bumper number 229703.Part Number: AC-1891DFitsD10 SN...
  • Allis-Chalmers Bronze Seat Bushings Set 70227910, set of eight cylindrical bronze bushings with a hollow center for tractor seat followers.

    Allis Chalmers Bronze Seat Bushings Set 70227910 227910

    Allis-Chalmers
    $30.75
    70227910
    Set of 8 bronze seat bushings for Allis Chalmers tractors.Sold under part number 70227910.Part Number: 70227910FitsAllis Chalmers D10Allis Chalmers D12Allis Chalmers D14Allis Chalmers D15Allis...
  • Allis-Chalmers Auxiliary Male 2 Pin Connector Plug, metallic connector with two gold pins and hexagonal nut on top, used for electrical connections.

    Auxiliary Male 2 Pin Connector Plug

    Allis-Chalmers
    $29.75
    AB-1868D
    Auxiliary Male 2 Pin Connector Plug with threaded cable grip and plated brass pins.For 12-18 gauge wire. Wires must be soldered or crimped.Part Number: AB-1868DFitsAllis Chalmers - variousCase -...
  • Allis-Chalmers Allis Chalmers IT I &T Shop Service Manual AC-202, grey sketch of an Allis-Chalmers tractor on the cover page.

    Allis Chalmers I & T Shop Service Manual AC-202

    Allis-Chalmers
    $41.75
    AC-202M
    Allis Chalmers I & T Shop Service Manual AC-202 covers repair and restoration information for listed Allis Chalmers tractors.It includes specifications, torques, exploded views, and photos to help...
  • Allis-Chalmers REAR SPINOUT RIM STOP  Allis Chalmers  Ford  Case  Massey Ferguson  JD

    REAR SPINOUT RIM STOP for Allis-Chalmers, Ford, Case, Massey Ferguson, JD

    Allis-Chalmers
    $17.00
    MI-109D
    Rear spinout rim stop for parallel drilled rim rails. For spin out rims using 6 sided stops. Fits all of our spin out rims we sell.Part Number: MI-109DFitsAllis Chalmers: variousCase:...
  • Allis-Chalmers REAR SPINOUT (Power Shift) RIM 13 X 28 - WH-008D

    Allis-Chalmers Rear Spinout Rim 13 x 28

    Allis-Chalmers
    $749.75
    WH-008D
    Rear spinout (Power Shift) wheel rim, 13 x 28. 4 rails with stop adjustment holes drilled 90 degrees perpendicular to the side of the rim, not 90 degrees to the rail. USA made.To determine rim width,...
  • Allis-Chalmers REAR SPINOUT RIM STOP Allis Chalmers Case Ford Massey Ferguson JD

    Rear Spinout Rim Stop for Allis Chalmers, Case, Ford, Massey Ferguson, JD

    Allis-Chalmers
    $16.75
    MI-108D
    Rear spinout rim stop for Allis Chalmers, Case, Cockshutt, Ford, IH/Farmall, JD, Massey Ferguson, Massey Harris, MM, and Oliver.90 degree drilled rim rail for spinout rims with 4 sided rectangle...
  • Allis-Chalmers Rim Stop Bolt - Allis Chalmers, Case, Ford, JD, Massey Ferguson

    Rim Stop Bolt for Allis Chalmers, Case, Ford, JD, Massey Ferguson

    Allis-Chalmers
    $8.75
    MI-110D
    Rim stop bolt for listed tractor models from Allis Chalmers, Case, Cockshutt, Ford, IH/Farmall, JD, Massey Ferguson, Massey Harris, MM, Oliver, White, and Landini.Use with parallel or 90 degree...
  • Allis-Chalmers REAR TIRE INNER TUBE VALVE - AB-384D

    Rear Tire Inner Tube Valve for Tractor Tubes with External Threads

    Allis-Chalmers
    $11.75
    AB-384D
    Rear tire inner tube valve for tractor tubes with external threads.Old style air/water valve, sold individually.Part Number: AB-384DFitsAllis ChalmersAveryCaseCockshuttFordIH / FarmallJohn...
  • Allis-Chalmers Tire Inner Tube Valve Brass Nut

    Tire Inner Tube Valve Brass Nut

    Allis-Chalmers
    $2.00
    AB-385D
    Brass nut for rear tire inner tube valve use. Sold individually.Part Number: AB-385DFitsAllis Chalmers - variousCase - variousCockshutt - variousFord - variousInternational - variousJohn Deere -...
  • 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,...
  • Allis-Chalmers 4.5" x 16" 6 Lug Front Wheel with 4 Wheel Weight Holes, white, circular steel tractor wheel with bolt holes

    4.5" x 16" 6 Lug Front Wheel with 4 Wheel Weight Holes

    Allis-Chalmers
    $99.75
    WH-022D
    4.5" x 16" 6 Lug Front Wheel with 4 Wheel Weight HolesFor select tractors using a 4 1/2" x 16" 6 lug rim.Part Number: WH-022DFitsAllis Chalmers: ED40, D19, D17 (SN: 75001 and up, 6 Lug), D15 (SN:...
  • 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...
  • 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...
  • 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 /...
  • 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 /...
  • 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...