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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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  • Cream-colored metal tractor seat pan for Allis-Chalmers D10, D12, D14, D15, D17, D19, and D21 farm tractors.

    Allis Chalmers Metal Seat Pan for D10, D12, D14, D15, D17, D19, D21

    Allis-Chalmers
    $188.00
    KM7539
    Allis Chalmers metal seat pan for select tractor models. Made in the USA with a steel frame and restoration-quality construction.Part Number: KM7539FitsD10D12D14D15D17D19D21Also fits 170, 175, 180,...
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  • One-quart can of Northern Fuel Tank Liner, a gas tank sealer for Allis-Chalmers farm tractors. The can has a blue-and-white label with yellow lettering and a silver metal lid.

    Gas Tank Sealer - 1 Quart Can

    Allis-Chalmers
    $69.99
    ACR2043
    Gas tank sealer in a 1 quart can.Part Number: ACR2043FitsAllis-Chalmers - VariousCase - VariousCockshutt - VariousFord - VariousInternational - VariousJohn Deere - VariousMassey Ferguson -...
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  • Close-up of a silver 55-amp alternator with a black tachometer gear box and threaded pulley shaft, for Allis-Chalmers farm tractors.

    55 Amp Alternator with Gear Box for Tachometer for Allis-Chalmers D21, 170, 175, 180, 185, 190, 190XT, 190XT III, 200, 210, 220, H4, HD4

    Allis-Chalmers
    $258.50
    70245330
    55 amp alternator with gear box for tachometer for select Allis-Chalmers tractors. Tach drive is already bolted on.Part Number: 70245330FitsAllis Chalmers - D21, 170, 175, 180, 185, 190, 190XT, 190XT...
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  • Allis-Chalmers D Series 3-3/8 Inch Nickel Plated Hole Plug 71995k86, image showing a metal hole plug with a screw and a mounting bracket.

    Allis Chalmers D Series 3-3/8 Inch Nickel Plated Hole Plug 71995k86

    Allis-Chalmers
    $12.00
    71995k86
    Nickel plated 3-3/8 inch snap-in hole plug for Allis Chalmers D Series tractors.Part Number: 71995k86FitsAllis Chalmers D Series TractorsSpecs3-3/8 inchNotesTachometer gauge hole.
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  • Allis-Chalmers 2 inch Snap-In Hole Plug, Nickel Plated, with one side showing the plug's detailed edge and the other side showing a smooth, metallic surface.

    Allis Chalmers 2" Snap-In Hole Plug, Nickel Plated

    Allis-Chalmers
    $3.00
    9563K54
    Allis Chalmers D Series tractors 2 inch snap-in hole plug in nickel plated finish.Use this plug to cover oil, amp meter, temperature, and traction booster gauge holes.Part Number: 9563K54FitsD Series...
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  • Allis-Chalmers 7/8 inch Snap-In Hole Plug, Nickel Plated, 9563K46, image showing front and back views of the nickel-plated metal hole plug with a serrated interior for secure fit.

    Allis-Chalmers 7/8" Snap-In Hole Plug, Nickel Plated - 9563K46

    Allis-Chalmers
    $1.50
    9563K46
    OverviewNickel plated 7/8" snap-in hole plug for Allis-Chalmers D Series tractors and cigarette lighter openings. Part Number: 9563K46.FitsAllis-Chalmers D Series tractorsCigarette lighter...
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  • Allis-Chalmers D Series 1" Snap-In Hole Plug 9563K47, two metallic gold-colored hole plugs with a smooth and textured surface, one with a snap-in design and the other plain.

    Allis-Chalmers D Series 1" Snap-In Hole Plug 9563K47

    Allis-Chalmers
    $1.50
    9563K47
    Nickel-plated 1" snap-in hole plug for Allis-Chalmers D Series tractors.Noted for key ignition switch use.Part Number: 9563K47FitsAllis-Chalmers D Series TractorsSpecsSize: 1 inchNotesKey ignition...
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  • Allis-Chalmers 11/16 inch Snap-In Hole Plug Nickel Plated Allis Chalmers D Series, product image showing the plug's internal and external views.

    11/16" Snap-In Hole Plug Nickel Plated Allis Chalmers D Series

    Allis-Chalmers
    $1.25
    9563K61
    11/16 inch snap-in hole plug for Allis Chalmers D Series tractors. Nickel plated and described for push button start, fuse holder, and dash light use.Part Number: 9563K61FitsAllis Chalmers D Series...
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  • Allis-Chalmers D Series 7/16 inch Snap-In Hole Plug 9563K84, metal hole plug with snap-in design for machinery maintenance and repair.

    Allis-Chalmers D Series 7/16" Snap-In Hole Plug 9563K84

    Allis-Chalmers
    $1.00
    9563K84
    Nickel-plated 7/16" snap-in hole plug for Allis-Chalmers D Series tractors.Noted for headlight switch use.Part Number: 9563K84FitsAllis-Chalmers D Series TractorsSpecsSize: 7/16 inchNotesHeadlight...
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  • Allis-Chalmers 1/2 inch Snap-In Hole Plug, Nickel Plated, with one view showing the plug's interior and the other showing the smooth exterior surface.

    Allis-Chalmers 1/2" Snap-In Hole Plug, Nickel Plated

    Allis-Chalmers
    $1.00
    9563K43
    Part Number: 9563K43Product Overview1/2 inch snap-in hole plug with a nickel plated finish for Allis-Chalmers D Series tractors. Intended for belt pulley rod or knob holes.FitsAllis-Chalmers D Series...
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  • Allis-Chalmers farm tractor front wheel bearing kit, model WBKAC3, shown as six metal components: two tapered roller bearings, two bearing races, and two seals.

    Allis-Chalmers Front Wheel Bearing Kit | WBKAC3

    Allis-Chalmers
    $74.00
    WBKAC3
    Part Number: WBKAC3Allis-Chalmers Front Wheel Bearing KitFront wheel bearing kit for Allis-Chalmers D21, 210, and 220.FitsAllis-Chalmers D21Allis-Chalmers 210Allis-Chalmers 220Replaces / Cross...
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  • Allis-Chalmers tractor brake band with hardware, shown on a white background: a curved black band with gray friction lining and brass-colored rivets, accompanied by a pin and two flat linkage plates. Fits D17, D19, D21, 170, 175, 180, 185, 190, 190XT, 190XT III, and 200 tractors.

    Brake Band with Hardware for Allis-Chalmers D17, D19, D21, 170, 175, 180, 185, 190, 190XT, 190XT III, 200

    Allis-Chalmers
    $37.75
    70277379
    Brake band with hardware for select Allis-Chalmers tractors. Sold individually and includes the hardware kit.Part Number: 70277379FitsAllis Chalmers - D17 (SN 42001 and up), D19, D21, 170, 175, 180,...
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  • Close-up of a metal 180-degree thermostat for an Allis-Chalmers farm tractor, with a wide circular flange, central brass-colored valve, and coiled spring.

    180 Degree Thermostat - Allis-Chalmers

    Allis-Chalmers
    $11.75
    74025103
    180 Degree Thermostat for select Allis Chalmers tractors and equipment.Part Number: 74025103FitsAllis Chalmers D17Allis Chalmers D19Allis Chalmers D21Allis Chalmers 180Allis Chalmers 185Allis...
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  • A small clear incandescent bulb with a brass-colored bayonet base, shown horizontally on a white background. Allis-Chalmers Power Director light bulb for farm tractors.

    Allis-Chalmers Power Director Light Bulb

    Allis-Chalmers
    $3.00
    9527T602
    Bulb for the Power Director Light Assembly on select Allis-Chalmers tractors.Part Number: 9527T602FitsAllis Chalmers D14Allis Chalmers D15Allis Chalmers D17Allis Chalmers D19Allis Chalmers D21Allis...
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  • A glossy red, dome-shaped ribbed light lens with a ridged circular base, shown against a white background. It is an Allis-Chalmers Power Director tractor light lens.

    Allis-Chalmers Power Director Light Lens - Red Lens

    Allis-Chalmers
    $13.75
    70240838-R
    Red Power Director light lens for select Allis-Chalmers tractors.Part Number: 70240838-RFitsAllis Chalmers D17Allis Chalmers D19Allis Chalmers D21Allis Chalmers 170Allis Chalmers 175Allis Chalmers...
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  • Allis-Chalmers farm tractor cigarette lighter, featuring a black knob with a cigarette symbol, a gold-toned metal body, and a red wire.

    Black Cigarette Lighter with Cigarette on Knob JD-974BD

    Allis-Chalmers
    $19.75
    JD-974BD
    Black cigarette lighter with a cigarette design on the knob. Listed under part number JD-974BD.Part Number: JD-974BDSpecsBlack cigarette lighterCigarette design on knobNotesCompare knob style before...
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  • Allis-Chalmers Ammeter 60-0-60 AMP Gauge 2 inch Diameter, analog display of electrical current measurement with black dial and red needle.

    Ammeter 60-0-60 AMP Gauge 2" Dia

    Allis-Chalmers
    $23.00
    AMG60
    Universal 60-0-60 AMP ammeter gauge with a 2" dia. hole fitment. Condition: New.Part Number: AMG60FitsAllis Chalmers - 160, 170, 175, 180, 185, 190, 190XT, 200, 210, 220, 2RCP, 4650, 4660, 4W-220,...
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  • Allis-Chalmers D21 Series II vinyl decal set laid out on a white background, including long gray model and brand stripes, “D 21,” “ALLIS-CHALMERS,” Series II turbocharged diesel lettering, safety and operating labels, and an Allis-Chalmers emblem.

    Allis-Chalmers D21 Series II Vinyl Decal Set

    Allis-Chalmers
    $151.00
    DJS131
    Part Number: DJS131Product OverviewVinyl decal set for the Allis-Chalmers D21 Series II. Listed for 1965-1969 models.FitsAllis-Chalmers D21 Series II (1965-1969)NotesVinyl decals
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