Alternator for John Deere Excavator 290, 490, 590, 690, 790, 892, 493 400-12491
Alternator for John Deere Excavator 290, 490, 590, 690, 790, 892, 493 400-12491
Alternator for John Deere Excavator 290, 490, 590, 690, 790, 892, 493 400-12491
Alternator for John Deere Excavator 290, 490, 590, 690, 790, 892, 493 400-12491
Alternator for John Deere Excavator 290, 490, 590, 690, 790, 892, 493 400-12491
Alternator for John Deere Excavator 290, 490, 590, 690, 790, 892, 493 400-12491
Alternator for John Deere Excavator 290, 490, 590, 690, 790, 892, 493 400-12491
Alternator for John Deere Excavator 290, 490, 590, 690, 790, 892, 493 400-12491

Alternator for John Deere Excavator 290, 490, 590, 690, 790, 892, 493 400-12491

Item #: 400-12491

30-DAY RETURN POLICY

If your order arrives and it’s not exactly what you want, you may return it within 30 days for a refund. We know that people sometimes order a part and then discover it’s not exactly the one they need for the repair. We understand and want to work with you. Just make sure the item is in its original packaging and in good condition free of damage.

When a returned product comes back to us, we’ll check it over to make sure it’s in ‘Like New’ condition and free from damage such as dents, scratches, cracks, abuse, defacement or indication of removed screws/fasteners or seals. Return processing may take up to 5 business days from the time your product is received by DB Electrical.

To return a product, simply click here to start the process.

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DB Electrical alternators are highly engineered for excellence in performance.
  • Built to Beat the Heat: High temperature epoxy and high temperature grease withstand extreme heat
  • Heavy-duty rectifiers and high-quality regulators enhance superior charging performance
  • Most alternators are supplied with final test results and performance curve
  • Direct-fit replacement and easy installation made possible with OEM fitment specifications
  • Factory direct, money-saving alternator typically priced substantially less than OEM counterparts
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  • Product Info
  • Applications List
  • Part Replacement List
  • Policy Information
  • Reviews

Overview

DB Electrical Alternators
DB Electrical keeps vehicles of every shape and size moving forward – from mowers, motorcycles and ATVs to automobiles, tractors, pickups and large commercial trucks. We work directly with factories to ensure each component is manufactured to our exacting quality control standards. But because there is no middleman, we can offer these exceptional-quality electrical components at low factory direct prices.

With DB Electrical alternators, you’ll get …

  • Superior Quality Every Time – Our aftermarket alternators deliver performance that’s equivalent to the original.
  • Direct-Fit OEM Replacement Parts – DB Electrical aftermarket alternators are designed for perfect fitment to replace the ones that originally came with your vehicle.
  • Engineer-Tested Excellence – Our alternators go through a rigorous testing program to ensure optimal performance. Most alternators are supplied with their final test results and performance curve.

Reasons to choose DB Electrical for your next alternator:

  • Built to Take the Heat – Most DB Electrical alternators offer high-temperature epoxy, heavy-duty rectifiers, high-quality regulators, top-quality bearings and high-temperature grease for better charging and longer life under high-heat environments.
  • Depth of Inventory – Find both common and hard-to-find alternators for virtually any type of vehicle to travel over road, trail or water.
  • Brand New Alternator – Never settle for a secondhand one. Many places will try to sell you a used alternator for about the price we’ll sell you a new one.

The DB Electrical Advantage – 1-Year Warranty
DB Electrical delivers exceptional value for products that we stand behind with our total-confidence 1-year warranty. Yes, you have a full year to make sure your alternator meets your expectations.

Item Number: 400-12491

100% Brand New Aftermarket Part From DB Electrical

Product Specs

Item ConditionAftermarket Part
Unit TypeAlternator
Part TypeUNIT
Voltage24
RotationCW
Amperage40
Clock12
Pulley ClassV1
RegulatorIR
Fan TypeEF
FitsJOHN DEERE AND OTHER INDUSTRIAL EQUIPMENT

Applications List

Select Make & Type
MAKE TYPE MODEL YEAR ENGINE
Case IHWheel LoaderW14H1975336 Diesel
Case IHWheel LoaderW14H1976336 Diesel
Case IHWheel LoaderW14H1977336 Diesel
Case IHWheel LoaderW14H1978336 Diesel
Case IHWheel LoaderW14H1979336 Diesel
Case IHWheel LoaderW14H1980336 Diesel
Case IHWheel LoaderW14H1981336 Diesel
Case IHWheel LoaderW14H1982336 Diesel
Case IHWheel LoaderW14H1983336 Diesel
Case IHWheel LoaderW14H1984336 Diesel
Case IHWheel LoaderW181971401 Diesel
Case IHWheel LoaderW181972401 Diesel
Case IHWheel LoaderW181973401 Diesel
Case IHWheel LoaderW181974401 Diesel
Case IHWheel LoaderW181975401 Diesel
Case IHWheel LoaderW181976401 Diesel
Case IHWheel LoaderW181977401 Diesel
Case IHWheel LoaderW18B1971504 Diesel
Case IHWheel LoaderW18B1972504 Diesel
Case IHWheel LoaderW18B1973504 Diesel
Case IHWheel LoaderW18B1974504 Diesel
Case IHWheel LoaderW18B1975504 Diesel
Case IHWheel LoaderW18B1976504 Diesel
Case IHWheel LoaderW18B1977504 Diesel
Case IHWheel LoaderW201971401 Diesel
Case IHWheel LoaderW201972401 Diesel
Case IHWheel LoaderW201973401 Diesel
Case IHWheel LoaderW201974401 Diesel
Case IHWheel LoaderW201975401 Diesel
Case IHWheel LoaderW201976401 Diesel
Case IHWheel LoaderW201977401 Diesel
Case IHWheel LoaderW24B1975504 Diesel
Case IHWheel LoaderW24B1976504 Diesel
Case IHWheel LoaderW24B1977504 Diesel
Case IHWheel LoaderW26B1971504 Diesel
Case IHWheel LoaderW26B1972504 Diesel
Case IHWheel LoaderW26B1973504 Diesel
Case IHWheel LoaderW26B1974504 Diesel
Case IHWheel LoaderW26B1975504 Diesel
Case IHWheel LoaderW26B1976504 Diesel
Case IHWheel LoaderW26B1977504 Diesel
Case IHWheel LoaderW361978504 Diesel
Case IHWheel LoaderW361979504 Diesel
Case IHWheel LoaderW361980504 Diesel
Case IHWheel LoaderW361981504 Diesel
Case IHWheel LoaderW361982504 Diesel
FIAT-ALLISGrader100C197411000 Diesel
FIAT-ALLISGrader100C197511000 Diesel
FIAT-ALLISGrader100C197611000 Diesel
FIAT-ALLISGrader150C197411000 Diesel
FIAT-ALLISGrader150C197511000 Diesel
FIAT-ALLISGrader150C197611000 Diesel
FIAT-ALLISGrader200C197411000 Diesel
FIAT-ALLISGrader200C197511000 Diesel
FIAT-ALLISGrader200C197611000 Diesel
JOHN DEEREEngine2.9LAllEngine Code 3140 41
JOHN DEEREEngine3029AllEngine Code 3140 41
JOHN DEEREEngine4239D / 4239TAllAll
JOHN DEEREEngine6059AllAll
JOHN DEEREEngine6068AllAll
JOHN DEEREEngine6101AllAll
JOHN DEEREEngine6466A / D / TAllAll
JOHN DEEREEngine6619AllAll
JOHN DEEREEngine - Marine4039DFM (Code 3140)All3.9L - 239ci - 4cyl
JOHN DEEREEngine - Marine4045TFM (Code 3140)All4.5L - 276ci - 4cyl
JOHN DEEREEngine - Marine6068DFM (Code 3140)All6.8L - 414ci - 6cyl
JOHN DEEREEngine - Marine6068TFM (Code 3140)All6.8L - 414ci - 6cyl
JOHN DEEREEngine - Marine6076AFM (Code 3132)All7.6L - 466ci - 6cyl
JOHN DEEREEngine - Marine6076AFM (Code 3136)All7.6L - 466ci - 6cyl
JOHN DEEREEngine - Marine6076AFM30 (Code 3136)All7.6L - 466ci - 6cyl
JOHN DEEREExcavator290D1990JD 3.9L 68HP Dsl
JOHN DEEREExcavator290D1991JD 3.9L 68HP Dsl
JOHN DEEREExcavator290D1992JD 3.9L 68HP Dsl
JOHN DEEREExcavator290D1993JD 3.9L 68HP Dsl
JOHN DEEREExcavator290D1994JD 3.9L 68HP Dsl
JOHN DEEREExcavator290D1995JD 3.9L 68HP Dsl
JOHN DEEREExcavator4901985JD 3.9L 75HP Dsl
JOHN DEEREExcavator4901986JD 3.9L 75HP Dsl
JOHN DEEREExcavator4901987JD 3.9L 75HP Dsl
JOHN DEEREExcavator4901988JD 3.9L 75HP Dsl
JOHN DEEREExcavator490D1985JD 4.5L 80HP Dsl
JOHN DEEREExcavator490D1986JD 4.5L 80HP Dsl
JOHN DEEREExcavator490D1987JD 4.5L 80HP Dsl
JOHN DEEREExcavator490D1988JD 4.5L 80HP Dsl
JOHN DEEREExcavator495D1989JD 4.5L 100HP Dsl
JOHN DEEREExcavator495D1990JD 4.5L 100HP Dsl
JOHN DEEREExcavator495D1991JD 4.5L 100HP Dsl
JOHN DEEREExcavator495D1992JD 4.5L 100HP Dsl
JOHN DEEREExcavator590D1989JD 4.5L 100HP Dsl
JOHN DEEREExcavator590D1990JD 4.5L 100HP Dsl
JOHN DEEREExcavator590D1991JD 4.5L 100HP Dsl
JOHN DEEREExcavator590D1992JD 4.5L 100HP Dsl
JOHN DEEREExcavator590D1993JD 4.5L 100HP Dsl
JOHN DEEREExcavator590D1994JD 4.5L 100HP Dsl
JOHN DEEREExcavator590D1995JD 4.5L 100HP Dsl
JOHN DEEREExcavator690D1988JD 6.8L 132HP Dsl
JOHN DEEREExcavator690D1989JD 6.8L 132HP Dsl
JOHN DEEREExcavator690D1990JD 6.8L 132HP Dsl
JOHN DEEREExcavator690D1991JD 6.8L 132HP Dsl
JOHN DEEREExcavator690D1992JD 6.8L 132HP Dsl
JOHN DEEREExcavator690EAllJD 6.8L 140HP Dsl
JOHN DEEREExcavator690E LCAllJD 6.8L 140HP Dsl
JOHN DEEREExcavator70D1988JD 3.9L 55HP Dsl
JOHN DEEREExcavator70D1989JD 3.9L 55HP Dsl
JOHN DEEREExcavator70D1990JD 3.9L 55HP Dsl
JOHN DEEREExcavator70D1991JD 3.9L 55HP Dsl
JOHN DEEREExcavator70D1992JD 3.9L 55HP Dsl
JOHN DEEREExcavator70D1993JD 3.9L 55HP Dsl
JOHN DEEREExcavator7901986466 Diesel
JOHN DEEREExcavator7901987466 Diesel
JOHN DEEREExcavator790D1988466 Diesel
JOHN DEEREExcavator790D1989466 Diesel
JOHN DEEREExcavator790D1990466 Diesel
JOHN DEEREExcavator790D1991466 Diesel
JOHN DEEREExcavator790D1992466 Diesel
JOHN DEEREExcavator7921986466 Diesel
JOHN DEEREExcavator7921987466 Diesel
JOHN DEEREExcavator7921988466 Diesel
JOHN DEEREExcavator892D LC1989466 Diesel
JOHN DEEREExcavator892D LC1990466 Diesel
JOHN DEEREExcavator892D LC1991466 Diesel
JOHN DEEREExcavator892D LC1992466 Diesel
JOHN DEEREExcavator892D LC1993466 Diesel
JOHN DEEREExcavator892E LCAll466 Diesel
JOHN DEEREExcavator992D LC1988619 Diesel
JOHN DEEREExcavator992D LC1989619 Diesel
JOHN DEEREExcavator992D LC1990619 Diesel
JOHN DEEREExcavator992D LC1991619 Diesel
JOHN DEEREExcavator992D LC1992619 Diesel
JOHN DEEREExcavator992D LC1993619 Diesel
JOHN DEEREFeller Bunchers493D19884045 Diesel
JOHN DEEREFeller Bunchers493D19894045 Diesel
JOHN DEEREFeller Bunchers493D19904045 Diesel
JOHN DEEREFeller Bunchers493D19914045 Diesel
JOHN DEEREFeller Bunchers493D19924045 Diesel
JOHN DEEREFeller Bunchers493D19934045 Diesel
JOHN DEEREFeller Bunchers493D19944045 Diesel
JOHN DEEREFeller Bunchers493D19954045 Diesel
JOHN DEEREFeller Bunchers693D19886068 Diesel
JOHN DEEREFeller Bunchers693D19896068 Diesel
JOHN DEEREFeller Bunchers693D19906068 Diesel
JOHN DEEREFeller Bunchers693D19916068 Diesel
JOHN DEEREFeller Bunchers693D19926068 Diesel
JOHN DEEREFeller Bunchers693D19936068 Diesel
JOHN DEEREFeller Bunchers693D19946068 Diesel
JOHN DEEREFeller Bunchers693D19956068 Diesel
JOHN DEEREFeller Bunchers793D1988All
JOHN DEEREFeller Bunchers793D1989All
JOHN DEEREFeller Bunchers793D1990All
JOHN DEEREFeller Bunchers793D1991All
JOHN DEEREFeller Bunchers793D1992All
JOHN DEEREFeller Bunchers793D1993All
JOHN DEEREFeller Bunchers793D1994All
JOHN DEEREFeller Bunchers793D1995All
JOHN DEEREGrader570BAll359 Diesel
JOHN DEEREGrader670BAllJD 6.8L 142HP Dsl
JOHN DEEREGrader672BAllJD 6.8L 142HP Dsl
JOHN DEEREGrader770B / BHAllJD 7.6L 162HP Dsl
JOHN DEEREGrader772B / BHAllJD 7.6L 165HP Dsl
JOHN DEEREPower UnitCD3029DFAllGenset - Code 3141
JOHN DEEREPower UnitCD4039DF / TFAllGenset - Code 3141
JOHN DEEREPower UnitCD6059TFAllGenset - Code 3140
JOHN DEEREPower UnitCD6068TFAllGenset - Code 3140
TUGGPUTM-4900JDAllJohn Deere Dsl
WAUKESHAEngineF-119719746cyl Gas and Diesel
WAUKESHAEngineF-289519746cyl Gas LPG & Diesel
WAUKESHAEngineF-352119746cyl Gas and LPG
WAUKESHAEngineF-817G19746cyl Gas
WAUKESHAEngineF-817G19756cyl Gas
WAUKESHAEngineF-817G19766cyl Gas
WAUKESHAEngineF-817G19776cyl Gas
WAUKESHAEngineF-817G19786cyl Gas
WAUKESHAEngineF-817G19796cyl Gas
WAUKESHAEngineF-817G19806cyl Gas
WAUKESHAEngineH-107719748cyl Gas and Diesel
WAUKESHAEngineL-1616197412cyl Gas and Diesel
WAUKESHAEngineL-5100D197412cyl Diesel
WAUKESHAEngineL-5108G197412cyl Gas
WAUKESHAEngineL-5790197412cyl Gas and Diesel
WAUKESHAEngineL-7042G197412cyl Gas and Diesel
WAUKESHAEngineP-2154197416cyl Gas and Diesel

Replaces These Part Numbers

ARROWHEADADR0392, 400-12491
CASEL59901
DELCO1101285, 1102348
J&N Electrical Products400-12228
JOHN DEEREAT130930, TY6752
LESTER7163, 7646
WAI1-2720-11DR

Frequently Asked Questions

Q: Do I need a larger charge wire for a High Output unit?
A: The high amp unit will operate better than stock, but not to its full potential without a larger charge wire. It’s the same reason firetrucks do not use garden hoses. It is IMPARATIVE to have proper charge and ground cables.

Q: Does a High Amp unit cause any damage to my battery or my vehicles charging system?
A: As long as it is installed properly with battery in good condition, then no. A High Output unit works exactly like a factory unit and only produces what is being demanded. No alternator works continuously at full output. Higher amperage is not bad and will not hurt a battery, but high voltage will blow one up.

Q: Will aftermarket underdrive pulleys (crankshaft power pulley) have any effect on my alternator?
A: Yes, underdrive crankshaft pulleys slow all the components (power steering, a/c, and alternator) to provide more power to the rear wheels. In some cases, the charging systems will fall totally on the battery at idle and completely stop charging.

Q: Where is the best place to get a voltage reading of the alternator output?
A: You’ll get the most accurate voltage reading from the back of the alternator at the main charge post that runs directly to the battery. This must be done while the vehicle is running.

Q: Why is the pulley on a high amp alternator smaller than my stock pulley?
A: The smaller pulley advances the power curve of the alternator just slightly, which produces a little more amperage around the idle if needed.

Q: Will I need a smaller belt for my high amp unit?
A: This varies by application because not all belts and belt tensioners are in the same condition. The tensioner will always tell you if you need a new belt or not. If it’s in range, you will not. If it is out, you will. Generally, you will need a belt that is one inch shorter than stock. You should have no problem finding a replacement wherever you buy your parts. V belt applications simply re-adjust your belt tensions to 3/8” deflection.

Q: What is the difference between a one wire, self-exciting and a self-energizing regulator?
A: Nothing. They are all exactly the same. Different manufacturers use different terms for marketing. The only wire to hook up is the charge wire to the battery. This does require modification for the alternator charge light on the dash.

Q: My stock unit used a five-groove pulley, and you sent my high amp alternator with a 6 groove. Why and what can I do?
A: 5 groove overdrive pullies are not produced. Install the belt on the back groove of the pulley closest to the fan or body of the alternator. The fan is internal, and this application will work just fine.

Q: Can your alternator be run in dual or triple alternator applications?
A: Yes. When wired and mounted correctly, the alternator can run in either dual or triple applications.

Q: Will I need a new battery with a high amp alternator?
A: If your battery is in good condition, and in spec of its OEM rating, then no. Your battery should work equally well with either the OEM and a High Amp unit.

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