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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 rounded choke rod knob for an Allis-Chalmers farm tractor, shown against a white background.

    Allis-Chalmers Choke Rod Knob K13

    Allis-Chalmers
    $5.50
    K13
    Allis-Chalmers choke rod knob. New part, SKU K13.Use on D-Series tractors using a choke lever rod.Part Number: K13FitsAllis-Chalmers D-Series using choke lever rodSpecsThread: 1/4" - 20Diameter: 1"
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  • Roll of black 1½-inch-wide fuel tank webbing for Allis-Chalmers farm tractors, with a short strip unwound, shown on a white background.

    Allis-Chalmers Fuel Tank Webbing - Black 1-1/2"

    Allis-Chalmers
    $2.40
    3510T83
    Black fuel tank webbing sold per foot. Fits tractors using webbed insulation between fuel tank mounts and sheet metal parts.Part Number: 3510T83FitsAllis Chalmers: variousCase: variousCockshutt:...
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  • Round Allis-Chalmers farm tractor voltage meter with a black dial marked 8–16 volts, white needle near 8, red warning zones, and a chrome bezel.

    Voltage Meter 8 to 16 Volt

    Allis-Chalmers
    $32.75
    VOLT12LT
    Voltage meter with 8 to 16 volt range and illuminated dial.Part Number: VOLT12LTFitsAllis Chalmers - variousCase - variousCockshutt - variousFord - variousInternational - variousJohn Deere -...
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  • Five black cylindrical seat replacement pins of varying lengths arranged horizontally on a white background for Allis-Chalmers farm tractors.

    Allis Chalmers 5 Piece Seat Pin Replacement Kit

    Allis-Chalmers
    $64.75
    DJSPINSET
    5-piece seat pin replacement kit for listed Allis Chalmers tractors.Part Number: DJSPINSETFitsAllis Chalmers D10Allis Chalmers D12Allis Chalmers D14Allis Chalmers D15Allis Chalmers D17Allis Chalmers...
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  • Black Allis-Chalmers farm tractor brake release knob with a round ball-shaped head and short cylindrical stem, shown on a white background.

    Allis Chalmers Brake Release Knob

    Allis-Chalmers
    $7.25
    72502132
    Brake release, parking brake knob for listed Allis Chalmers models.Part Number: 72502132FitsAllis Chalmers D10Allis Chalmers D12 (Brake Contol, POSITION & TRACTION BOOSTER CONTROL)Allis Chalmers D14...
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  • Black, glossy, spherical Allis-Chalmers hydraulic lever brake release knob, shown alone against a white background.

    Allis-Chalmers Hydraulic Lever Brake Release Knob

    Allis-Chalmers
    $5.75
    K21
    Hydraulic lever brake release knob for Allis-Chalmers equipment. Fits various models.Part Number: K21FitsAllis-Chalmers - fits various modelsSpecs3/8" - 24" thread1-3/8" diameter
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  • Black, round Allis-Chalmers hydraulic lever brake release knob for a farm tractor, shown against a white background.

    Allis-Chalmers Hydraulic Lever Brake Release Knob

    Allis-Chalmers
    $5.75
    K52
    Part Number: K52Allis-Chalmers Hydraulic Lever Brake Release KnobHydraulic lever and brake release knob with a 1-1/4" diameter and 3/8"-24 thread.FitsVarious models.SpecsDiameter: 1-1/4"Thread:...
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  • Allis-Chalmers Water Temperature Gauge, industrial water temperature meter with 130-280 degree range, with metal mounting and coiled sensor cable.

    Allis-Chalmers Water Temperature Gauge 130-280 Degree Range

    Allis-Chalmers
    $26.75
    UTG25
    Part Number: UTG25OverviewWater temperature gauge with a 130-280 degree range. Dash mount design with block fitting and chrome bezel included.Specs130-280 degree rangeDash mountIncludes block...
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  • Silver Allis-Chalmers snap coupler rivet with a twisted shank and broad rounded head, shown on a white background.

    Allis Chalmers Snap Coupler Rivet

    Allis-Chalmers
    $0.65
    DJS313
    Rivet for Allis-Chalmers Snap Couplers. Used to attach springs and sold individually.Part Number: DJS313FitsAllis-Chalmers Snap Coupler applicationsNotesSold individually.Used to attach springs.Item...
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  • Close-up of a metal sediment bowl assembly for Allis-Chalmers farm tractors, with a clear glass bowl, threaded metal fittings, a brass shutoff valve with wing handle, and a protective metal bracket.

    Allis Chalmers Sediment Bowl Assembly D15 D17 D19 D21 WD WD45 170 175 180 190 190XT

    Allis-Chalmers
    $34.75
    ACR2406
    Allis Chalmers sediment bowl assembly for the listed tractor models and applications below.Part Number: ACR2406Fits190XT, 190 (Gas, Dsl. Using 2.315 Long Glass Bowl)D15 (Gas (SN: 9001 & up) & All...
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  • Close-up of a round Allis-Chalmers tractor ammeter with a silver bezel and white face, labeled AMPERES and marked from 60 discharge through 0 to 60 charge. The needle points to zero.

    Allis Chalmers Amp Gauge (60-0-60) 12 Volt

    Allis-Chalmers
    $29.75
    AC-1833D
    12 volt Allis Chalmers amp gauge with a 60-0-60 scale and the Allis Chalmers logo.Part Number: AC-1833DFitsAllis Chalmers - Various (Any tractors that have been converted to 12 volt system)Specs12...
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  • A roll of black, 1-inch-wide Allis-Chalmers fuel tank webbing with a short strip unrolled, sold by the foot.

    Fuel Tank Webbing - Black 1" - Price Per Foot

    Allis-Chalmers
    $2.35
    3510T82
    Black fuel tank webbing for tractors using webbed insulation between fuel tank mounts and other sheet metal parts.Part Number: 3510T82FitsAllis-ChalmersCaseWhite /OliverCockshutFordInternational /...
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  • A roll of tan 1½-inch fuel tank webbing with a short length unrolled.

    Fuel Tank Webbing - Tan 1-1/2" - Price Per Foot

    Allis-Chalmers
    $4.35
    3531T52
    Tan fuel tank webbing for tractors using webbed insulation between fuel tank mounts and sheet metal parts.Part Number: 3531T52FitsAllis-ChalmersCaseWhite /OliverCockshutFordInternational /...
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  • Long, narrow yellow-and-cream Allis-Chalmers D Series hydraulic position control vinyl decal with small text and control markings, shown on a white background.

    Allis Chalmers D Series Hydraulic Position Control Vinyl Decal

    Allis-Chalmers
    $11.00
    DJS2496
    Hydraulic position control vinyl decal for listed Allis Chalmers D Series models.Part Number: DJS2496FitsAllis Chalmers D10Allis Chalmers D12Allis Chalmers D14Allis Chalmers D15Allis Chalmers...
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  • Chrome-colored diamond-shaped Allis-Chalmers tractor emblem with raised “A-C” and “ALLIS-CHALMERS” lettering, a toothed circular border, and a mounting hole on each side.

    Allis Chalmers ED40 D10 D12 D14 D15 D17 D19 D21 Steering Wheel Front Nose Emblem

    Allis-Chalmers
    $19.50
    ACR3996
    Unpainted steering wheel front nose emblem for listed Allis Chalmers applications.Part Number: ACR3996FitsAllis Chalmers ED40Allis Chalmers D10Allis Chalmers D12 (SN # 19001 and Up)Allis Chalmers...
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  • Two round brown brake linings with large center openings and multiple bolt holes overlap above a pile of brass rivets. Allis-Chalmers farm tractor brake disc lining kit.

    Allis Chalmers Brake Disc Lining Kit

    Allis-Chalmers
    $31.25
    ACR2836
    Brake disc lining kit for the Allis Chalmers models and combine listed below.Part Number: ACR2836FitsD19D21190190XT200 to SN 4000FF2KK2L CombineNotes2 kits required per tractorReplaces / Cross...
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  • Reflective metal brake disk ball for an Allis-Chalmers farm tractor, shown against a white background.

    Brake Disk Ball

    Allis-Chalmers
    $4.00
    BDB100
    Brake disk ball for multiple tractor applications.Part Number: BDB100FitsAllis Chalmers - 190XT, D19, D21, 170, 175, 180, 185, 190, 200 (4 used per side), D17 (SN: 75001 and up; 4 used per side),...
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  • Metal hood snap latch for Allis-Chalmers farm tractors, shown on a white background. The black-and-silver latch has a curved lever, mounting plate with a round bolt hole, and a rectangular catch.

    Hood Latch Snap Latch for Allis Chalmers D10 D12 D14 D15 D17 D19 D21

    Allis-Chalmers
    $12.00
    CH4000
    Part Number: CH4000Hood Latch Snap LatchHood latch snap latch for select Allis Chalmers tractors, bale throwers, balers, and some Gleaner combines. Strike not included.FitsALLIS CHALMERS - D10, D12,...
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