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.

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.

Filter By

Sort By:

Display Type:
Filters
  • Allis-Chalmers 4409X Sealed Beam Combination Rear Light Bulb 12V

    4409X Sealed Beam Combination Rear Light Bulb 12V

    Allis-Chalmers
    $20.00
    IH-899D
    4-1/2" diameter sealed beam combination rear light bulb for 12V systems. Double contact.Part Number: IH-899DFitsAllis Chalmers: D10, D12, D15, D17, D19, D21, 160, 170, 175, 180, 185, 190, 190XT, 200,...
    Add to Cart
  • Allis-Chalmers Oil Pan Drain Plug - Allis Chalmers Case Ford Massey Harris

    Oil Pan Drain Plug for Allis Chalmers, Case, Ford, Massey Harris

    Allis-Chalmers
    $8.95
    AB-539D
    Oil pan drain plug for select Allis-Chalmers, Case, Ford, Massey Harris, IH / Farmall, and Oliver applications.Clear zinc finish with 1-1/8" hex head and 7/8" - 18 UNF threads.Part Number:...
    Add to Cart
  • Allis-Chalmers 63 Amp One Wire Alternator with Pulley - Used for converting 6 volt to 12 volt - AB-418D

    63 Amp One Wire Alternator with Pulley for 6V to 12V Conversion

    Allis-Chalmers
    $129.75
    AB-418D
    63 amp one wire alternator with pulley, used for converting 6 volt to 12 volt systems.Built-in regulator and 1 wire hook up for 12 volt negative ground systems.Part Number: AB-418DFitsAllis Chalmers:...
    Add to Cart
  • Allis-Chalmers Washer / Gasket for Oil Pan Drain Plug 70226012 - AB-540D

    Washer / Gasket for Oil Pan Drain Plug 70226012

    Allis-Chalmers
    $3.00
    AB-540D
    Washer/gasket for oil pan drain plug 70226012. Use the application list below to confirm fit before ordering. Part Number: AB-540D Fits Allis Chalmers: 190XT, B (Engine SN: 64501 & up), C, CA, D10,...
    Add to Cart
  • Allis-Chalmers Universal Top Adjusting Bracket for Alternator or Generator, metal component with mounting holes and adjustable slot.

    Universal Top Adjusting Bracket for Alternator or Generator

    Allis-Chalmers
    $25.75
    AB-529D
    Universal top adjusting bracket for an alternator or generator. It may have to be modified to fit your specific application.Part Number: AB-529DFitsAllis ChalmersAveryCaseCockshuttFordIH /...
    Add to Cart
  • Allis-Chalmers Persian Orange #2 Allis Chalmers Steering Wheel Emblem Front Nose Emblem

    Allis-Chalmers Persian Orange #2 Emblem

    Allis-Chalmers
    $34.00
    A9902
    Persian Orange #2 emblem for select Allis-Chalmers tractors, combines, and lawn and garden models.Part Number: A9902FitsAllis Chalmers: ED40, D10, D12, D14 (sn 19001 and up), D15, D17 (sn 24001 and...
    Add to Cart
  • Allis-Chalmers Allis Chalmers Cream Emblem Steering Wheel

    Allis Chalmers Cream Emblem Steering Wheel

    Allis-Chalmers
    $34.50
    A9901
    Allis Chalmers Cream Emblem Steering Wheel with die cast, chromed finish and cream painted background.Use this emblem on the steering wheel or front grille nose where applicable.Part Number:...
    Add to Cart
  • Allis-Chalmers Allis Chalmers Steering Wheel Emblem With Decal Front Emblem D10 D12 D15 D17 D21 70246724

    Allis Chalmers Steering Wheel Emblem with Decal

    Allis-Chalmers
    $39.75
    A9904
    Allis Chalmers Steering Wheel Emblem with Decal fits as a steering wheel cap or a front emblem.Die cast, chromed construction with decal.Part Number: A9904FitsAllis Chalmers - Late: D10, D12, D15,...
    Add to Cart
  • Allis-Chalmers 12 Volt Bulb for Allis-Chalmers and More, clear glass automotive light bulb with metal base and filament inside.

    12 Volt Bulb for Allis-Chalmers and More

    Allis-Chalmers
    $3.00
    AB-345D
    12 volt bulb for listed tractors and equipment, including Allis-Chalmers, Case, Ford, International, John Deere, Massey Ferguson, Massey Harris, Minneapolis Moline, and Oliver.Part Number:...
    Add to Cart
  • Allis-Chalmers Chrome Dash Light Cover, shiny metallic chrome dash light cover with a smooth, rounded top surface.

    Allis-Chalmers Chrome Dash Light Cover

    Allis-Chalmers
    $18.99
    JD-589CHD
    Chrome dash light cover for select Allis-Chalmers, John Deere, and MM tractors. This 1-1/4 inch diameter chrome cover is for 2-screw style dash lights.Part Number: JD-589CHDFitsAllis Chalmers: D10,...
    Add to Cart
  • Allis-Chalmers 4.5-inch Clamp Ring with Screw for Allis-Chalmers equipment, black metal clamp with securing screw.

    4.5" Clamp Ring With Screw for Allis-Chalmers

    Allis-Chalmers
    $20.75
    JD-676D
    4.5" clamp ring with screw for select Allis-Chalmers and other applications. New condition.Part Number: JD-676DFitsAllis Chalmers: 7050, 7030, 6040, 220, 210, 200, 190, 185, 180, 175, 170, 160, D21,...
    Add to Cart
  • Allis-Chalmers 12-Volt Dash Light Assembly, stainless steel dash indicator with red wiring for Allis-Chalmers tractors.

    12-Volt Dash Light Assembly for Allis-Chalmers

    Allis-Chalmers
    $31.75
    AC-273D
    12-volt dash light assembly for Allis-Chalmers tractors.Chrome finish with a 0.658" socket diameter and 1" center-to-center mounting holes.Part Number: AC-273DFitsAllis-Chalmers 190XTAllis-Chalmers...
    Add to Cart
  • Allis-Chalmers Thermostat w/ Gasket for Ford Models, automotive radiator thermostat with gasket for engine cooling system repair.

    Thermostat w/ Gasket for Ford Models

    Allis-Chalmers
    $14.50
    AB-052D
    Part Number: AB-052DThermostat w/ Gasket for Ford ModelsThermostat with gasket for Ford models only. New part with multiple tractor applications listed below.FitsAllis Chalmers - 4W220, D21, 210,...
    Add to Cart
  • Allis-Chalmers RADIATOR DRAIN PLUG | Hydraulic Drain Plug | Block Drain Plug

    Allis-Chalmers Radiator Drain Plug

    Allis-Chalmers
    $4.00
    AB-209D
    Radiator, hydraulic, and block drain plug with broad tractor fitment. Thread size is 1/4" - 18 NPT.Part Number: AB-209DFitsAllis Chalmers: IB, B, C, RC, CA, WC, WF, WD, WD45, D10, D12, D14, D15, D17,...
    Add to Cart
  • Allis-Chalmers Radiator Mounting Pad

    Radiator Mounting Pad for Allis-Chalmers and More

    Allis-Chalmers
    $4.00
    AB-455D
    Universal radiator mounting pad made from rubber and sized at 1 3/4" x 1 3/4" x 1/4" thick.Use on listed Allis-Chalmers models and other tractor applications below.Part Number: AB-455DFitsAllis...
    Add to Cart
  • Allis-Chalmers 12 volt Voltage Regulator, black rectangular electrical component for Allis Chalmers tractors and equipment models 190XT, D21, 160, 185, 200, 170, 175, 180, 190, 210, 220, with product number 70243986.

    Voltage Regulator for Allis-Chalmers 190XT D21 160 185 200 170 175 180 190 210 220

    Allis-Chalmers
    $36.75
    AB-1148D
    12 volt voltage regulator for Allis-Chalmers tractors, for the models listed below.Part Number: AB-1148DFitsAllis-Chalmers: 190XT, D21, 160, 185, 200 (with factory alternator), 170, 175, 180, 190,...
    Add to Cart
  • Allis-Chalmers Raincap 3 in. 3 3/16 in. I.D., a durable metallic rain cap with mounting plate for protection and weather resistance in agricultural machinery.

    Raincap 3 in. 3 3/16 in. I.D.

    Allis-Chalmers
    $16.00
    RC-009D
    Part Number: RC-009DRaincapRaincap with a 3" - 3 3/16" inside diameter.FitsAllis ChalmersCaseCockshuttDavid BrownFordIH / FarmallJohn DeereMassey FergusonOliverSpecs3" - 3 3/16" I.D.
    Add to Cart
  • Allis-Chalmers 1 Wire Mini Alternator with Pulley 35 Amp 1/2 Pulley

    1 Wire Mini Alternator with Pulley 35 Amp

    Allis-Chalmers
    $199.50
    AB-535D
    1 wire mini alternator with pulley, 35 amp. Used to convert 6 volt systems to 12 volt systems on negative ground systems only. Preferred for tractors requiring a smaller diameter alternator for...
    Add to Cart