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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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  • Black metal hood latch for Allis-Chalmers D-series farm tractors, shown against a white background.

    Allis Chalmers D10 D12 D14 D15 D17 D19 D21 Hood Latch

    Allis-Chalmers
    $12.00
    CH4009
    Part Number: CH4009Allis Chalmers Hood LatchLoop-style snap hood latch for the Allis Chalmers tractors and Gleaner combines listed below.FitsAllis Chalmers D10Allis Chalmers D12Allis Chalmers...
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  • Allis-Chalmers Tractor Serial Numbers 1940-1975 Manual, book cover with tractor illustration and list of manufacturers.

    Tractor Serial Numbers 1940-1975 Manual

    Allis-Chalmers
    $9.00
    MAN072D
    Tractor serial numbers reference for 1940-1975 models.Use this manual to find serial number information for Allis-Chalmers and other listed brands.Part Number:...
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  • Round red 12-volt tail light assembly for an Allis-Chalmers farm tractor, with a ribbed red lens, dark housing, and red and black wires.

    12 Volt Round Red Tail Light Assembly w/ License Lamp Window

    Allis-Chalmers
    $13.75
    AB-548D
    Part Number: AB-548D12 Volt Round Red Tail Light Assembly w/ License Lamp Window12 volt round red tail light assembly with a license lamp window. For multiple tractor applications listed below...
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  • Black 12-volt ignition coil for an Allis-Chalmers farm tractor, with a built-in resistor, metal mounting band, and electrical terminals on top. The label says to use without an external resistor.

    12 Volt Coil with Internal Resistor

    Allis-Chalmers
    $24.75
    AB-509D
    12 volt coil with internal resistor. 2-3/16" barrel O/D and includes coil mounting bracket.Part Number: AB-509DFitsAllis ChalmersCaseCockshuttFord - 2000 3 Cylinder, 2000 4 cylinder, 4000 3 cylinder,...
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  • Allis-Chalmers 6-inch Battery Cable, heavy-duty braided silver cable with metal terminal end for automotive battery connections.

    6" Battery Cable

    Allis-Chalmers
    $15.75
    AB-401D
    6" ground battery cable, non-insulated, 2 gauge, with heavy duty straight terminals.Part Number: AB-401DFitsAllis Chalmers - D14 (Ground strap), D17 (Ground Strap on Diesel up to SN: 38963 and All...
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  • Allis-Chalmers universal 12-volt resistor for farm tractors, shown as a white ceramic rectangular component with two copper terminal tabs and a central metal mounting bracket with a round hole.

    Universal 12 Volt Resistor

    Allis-Chalmers
    $9.75
    AB-366D
    Universal 12 volt resistor, 2-terminal style, reduces voltage with 4 ohms of resistance.Part Number: AB-366DFitsAllis Chalmers - variousCase - variousCockshutt - variousFord - variousInternational -...
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  • 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...
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  • 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...
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  • 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...
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  • Allis-Chalmers Allis Chalmers QUADRANT SPRING, Hydraulic & Throttle Lever, Transmission Shift Fork Lever Spring 70226997 70229265

    Quadrant Spring for Allis-Chalmers WD WD45 D17 D19 D21 170 175 180 185 190 190XT 190XT III 200 210 220 220 FWA 7030 7050 7060 7080 7580

    Allis-Chalmers
    $8.75
    70226997
    Quadrant spring for Allis-Chalmers tractors. Used as a quadrant spring for hydraulic and throttle lever applications on WD and WD45 models.Part Number: 70226997FitsAllis Chalmers: WD, WD45 used as...
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  • 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 -...
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  • 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...
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  • 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:...
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  • 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,...
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  • 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...
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  • 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...
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  • 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...
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  • 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 -...
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