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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 Plunger Fuel Hand Primer for Allis Chalmers, Gleaner, New Idea, showing a metallic hand primer with a piston and rounded top.

    Plunger Fuel Hand Primer for Allis Chalmers, Gleaner, New Idea

    Allis-Chalmers
    $64.75
    74063231
    Allis Chalmers - D15, D21, 180, 185, 190, 190XT, 190XT III, 200, 210, 220, 7000, 7010, 7020, 7030, 7040, 7045, 7050, 7060, 7080, 7580, HD3Gleaner Combine - C, C II, F, F2, F3, G (Prior to SN# 17001),...
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  • Allis-Chalmers Valve Cover Gasket for Allis-Chalmers D21, 210, 220, 4W-220, black rubber gasket, engine part.

    Valve Cover Gasket for Allis-Chalmers D21, 210, 220, 4W-220

    Allis-Chalmers
    $34.50
    74035214
    Valve Cover Gasket for the listed Allis-Chalmers, Gleaner Combine, and engine applications. Use the cross references below to confirm compatibility for your application. Part Number:...
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  • Allis-Chalmers NBR Rubber Fuel Sending Unit Gasket, black rubber gasket with four bolt holes for fuel tank sealing.

    NBR Rubber Fuel Sending Unit Gasket

    Allis-Chalmers
    $4.25
    AB-3256RD
    NBR Rubber Fuel Sending Unit Gasket for select Allis Chalmers and other tractor models.Use the application and replacement numbers below to confirm fitment.Part Number: AB-3256RDFitsAllis Chalmers:...
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  • Allis-Chalmers Power Director Light Lens - Green, close-up of a vibrant green light lens with a ribbed, dome-shaped design on a plain white background.

    Allis Chalmers Power Director Light Lens - Green

    Allis-Chalmers
    $12.25
    70240838-G
    Green Power Director light lens for select Allis Chalmers tractors.Use the part numbers below to confirm your application.Part Number: 70240838-GFitsAllis Chalmers D17, D19, D21, 170, 175, 180, 185,...
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  • Allis-Chalmers Green Power Director Dash Oil Pressure Warning Light, automotive indicator warning light with green rounded top and metallic base.

    Allis Chalmers Green Power Director Dash Oil Pressure Warning Light

    Allis-Chalmers
    $39.50
    70240837-G
    Allis Chalmers - D14, D15, D17, D19, D21, 170, 175, 180, 185, 190, 190XT, 200, 210, 220Part Number: 70240837-GReplaces / Cross Reference70240837, 240837, 70240838, 240838NotesGreen Power Director...
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  • Allis-Chalmers Red Power Director Dash Oil Pressure Warning Light, a small automotive warning light with a red lens and metal mounting base.

    Allis Chalmers Red Power Director Dash Oil Pressure Warning Light

    Allis-Chalmers
    $39.50
    70240837-R
    Allis Chalmers - D14, D15, D17, D19, D21, 170, 175, 180, 185, 190, 190XT, 200, 210, 220Part Number: 70240837-RReplaces / Cross Reference70240837, 240837, 70240838, 240838NotesRed Power Director Dash...
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  • Allis-Chalmers Comfort Classic Vinyl Seat Assembly, black cushioned tractor or machinery seat with armrests.

    Allis Chalmers Comfort Classic Vinyl Seat Assembly

    Allis-Chalmers
    $665.00
    DJS7025
    Allis Chalmers Comfort Classic Seat Assembly (VINYL)Part Number: DJS7025FitsD10, D12, D14, D15, D17, D19, D21170, 175, 180, 185, 190, 190 XT, 190 XT III200, 210, 220, 220 FWA7000, 7010, 7020, 7030,...
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  • Allis-Chalmers Brake Pedal Spring Allis Chalmers 190 190XT 190XT III 200 D21 70239305

    Brake Pedal Spring for Allis Chalmers 190, 190XT, 190XT III, 200, D21

    Allis-Chalmers
    $19.75
    70239305
    Brake pedal spring for Allis Chalmers 190, 190XT, 190XT III, 200, and D21 tractors.Use the verified model fitment and replacement number below when matching your part.Part Number: 70239305FitsAllis...
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  • Allis-Chalmers PTO Guard Shield Allis Chalmers D21 70255996

    Allis-Chalmers PTO Guard Shield D21 KI1261

    Allis-Chalmers
    $135.00
    KI1261
    Part Number: KI1261Allis-Chalmers PTO Guard ShieldListed for Allis-Chalmers D21 tractors. Replaces 70255996.FitsAllis-Chalmers D21Replaces / Cross Reference70255996NotesPTO Shield Guard
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  • Allis-Chalmers Brake Band Hardware Kit Allis Chalmers Case

    Brake Band Hardware Kit for Allis-Chalmers and Case

    Allis-Chalmers
    $9.75
    70235614
    Brake Band Hardware Kit for Allis-Chalmers and Case tractors.2 kits used per side. Order 4 kits if servicing both sides.Part Number: 70235614FitsAllis Chalmers - D17 (SN 42001 & up), D19, D21, 170,...
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  • Allis-Chalmers In-line Fuel Filter

    Inline Fuel Filter 33033

    Allis-Chalmers
    $8.75
    33033
    Part Number: 33033Inline Fuel FilterIn-line fuel filter for use with 3/8" fuel lines. Includes hose and clamps and is Used to help keep rust and dirt out of the carburetor.FitsAllis Chalmers -...
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  • AGCO Fuel Primer Check Valve OEM Allis Chalmers 74050637

    Allis Chalmers Fuel Primer Check Valve 74050637

    AGCO
    $30.75
    74050637
    Fuel primer check valve for Allis Chalmers tractors, Gleaner combines, and the 860 Cotton Stripper applications listed below.Part Number: 74050637FitsAllis Chalmers D15Allis Chalmers D21Allis...
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  • Allis-Chalmers Breather Hose Allis Chalmers 74036094

    Allis-Chalmers Valve Cover Breather Hose 74036094

    Allis-Chalmers
    $33.75
    74036094
    Allis Chalmers - D19, D21, 4W220, 7030, 7040, 7045, 7050, 7060, 7080, 7580, 8030, 8050, 8070Valve cover breather hose.Part Number: 74036094Replaces / Cross Reference74036094Specs1-1/4" ID37-1/4"...
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  • Allis-Chalmers Outer Axle Seal Allis Chalmers D21 70238934

    Allis-Chalmers D21 Outer Axle Seal 70238934

    Allis-Chalmers
    $44.50
    70238934
    Part Number: 70238934Outer Axle SealOuter axle seal for the listed Allis-Chalmers model.FitsAllis-Chalmers D21Replaces / Cross Reference23893470238934Specs4.260 OD x 3.190 ID
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  • Aftermarket Sediment Bowl Filter

    Sediment Bowl Filter for Tall Bowl Assemblies

    Aftermarket
    $12.25
    DJS3039
    Fuel filter only. Sediment bowl not included. This fits our sediment bowl assembly ACR2406 and also fits replacement glass bowl
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  • Allis-Chalmers Allis Chalmers D21 210 220 Thermostat Bypass Hose

    Allis-Chalmers D21 210 220 Thermostat Bypass Hose

    Allis-Chalmers
    $27.75
    74026082
    Thermostat coolant bypass hose for Allis-Chalmers diesel tractors.Includes the stated 1.375" (1-3/8") ID size.Part Number: 74026082FitsAllis-Chalmers D21 dieselAllis-Chalmers 210 dieselAllis-Chalmers...
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  • Aftermarket Alternator Pulley fits Mini Denso Alternator

    Mini Denso Alternator Pulley AB-2315D

    Aftermarket
    $39.75
    AB-2315D
    Alternator Pulley Part Number: AB-2315D This alternator pulley is listed for the AB-535D Mini Alternator and select Denso alternators shown below. Review the dimensions before ordering. Fits AB-535D...
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  • Allis-Chalmers Allis Chalmers Hydraulic Hose Filter to Pump suction hose hydraulic pump D21 190 190XT 210 220 70239723

    Hydraulic Hose, Filter to Pump for Allis Chalmers D21 190 190XT 210 220

    Allis-Chalmers
    $37.75
    70239723
    Hydraulic hose, filter to pump, for select Allis Chalmers equipment.Part Number: 70239723FitsD21190 (Diesel, up to SN 26857)190 (Gas, up to SN 26855)190XT (Diesel, up to SN 26612)210220Replaces /...
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