Alternator for Caterpillar Ford Kenworth Peterbilt, Others 30SI Delco
Alternator for Caterpillar Ford Kenworth Peterbilt, Others 30SI Delco
Alternator for Caterpillar Ford Kenworth Peterbilt, Others 30SI Delco
Alternator for Caterpillar Ford Kenworth Peterbilt, Others 30SI Delco
Alternator for Caterpillar Ford Kenworth Peterbilt, Others 30SI Delco
Alternator for Caterpillar Ford Kenworth Peterbilt, Others 30SI Delco
Alternator for Caterpillar Ford Kenworth Peterbilt, Others 30SI Delco

Alternator for Caterpillar Ford Kenworth Peterbilt, Others 30SI Delco

Item #: 400-12447

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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: 400-12447

100% Brand New Aftermarket Part From DB Electrical

Product Specs

>
Item ConditionAftermarket Part
Unit TypeAlternator
Voltage12
RotationBI
DimensionReplacement 30SI Unit, B+Terminal:1/4-28, Notes:, 1-Wire System, R Terminal,
Amperage105
RegulatorIR
Fan TypeEF
FitsAG/Ind, Auto, Marine, Truck Applications
Delco 30SI Alternator

Applications List

Select Make & Type
<
MAKE TYPE MODEL YEAR ENGINE
CaterpillarEngine - Marine31761993629cu in 10.3L 6 cyl
ChampionGrader562D1975Diesel
ChampionGrader562D1976Diesel
ChampionGrader562D1977Diesel
ChampionGrader562D1978Diesel
ChampionGrader562D1979Diesel
ChampionGrader562D1980Diesel
ChampionGrader562D1981Diesel
ChampionGrader562D1982Diesel
ChampionGrader562D1983Diesel
ChampionGrader562D1984Diesel
ChampionGrader562D1985Diesel
ChampionGrader562D1986Diesel
ChampionGrader562D1987Diesel
ChampionGrader562D1988Diesel
ChampionGrader562D1989Diesel
ChampionGrader562D1990Diesel
ChampionGrader562D1991Diesel
ChampionGrader562D1992Diesel
ChampionGrader600D1975Diesel
ChampionGrader600D1976Diesel
ChampionGrader600D1977Diesel
ChampionGrader600D1978Diesel
ChampionGrader600D1979Diesel
ChampionGrader600D1980Diesel
ChampionGrader600D1981Diesel
ChampionGrader600D1982Diesel
ChampionGrader600D1983Diesel
ChampionGrader600D1984Diesel
ChampionGrader600D1985Diesel
ChampionGrader600D1986Diesel
ChampionGrader600D1987Diesel
ChampionGrader600D1988Diesel
ChampionGrader600D1989Diesel
ChampionGrader600D1990Diesel
ChampionGrader600D1991Diesel
ChampionGrader600D1992Diesel
ChampionGrader71019775.9
ChampionGrader71019785.9
ChampionGrader71019795.9
ChampionGrader71019805.9
ChampionGrader71019815.9
ChampionGrader71019825.9
ChampionGrader71019835.9
ChampionGrader71019845.9
ChampionGrader71019855.9
ChampionGrader71019865.9
ChampionGrader71019875.9
ChampionGrader71019885.9
ChampionGrader71019895.9
ChampionGrader71019905.9
ChampionGrader71019915.9
ChampionGrader710A19775.9
ChampionGrader710A19785.9
ChampionGrader710A19795.9
ChampionGrader710A19805.9
ChampionGrader710A19815.9
ChampionGrader710A19825.9
ChampionGrader710A19835.9
ChampionGrader710A19845.9
ChampionGrader710A19855.9
ChampionGrader710A19865.9
ChampionGrader710A19875.9
ChampionGrader710A19885.9
ChampionGrader710A19895.9
ChampionGrader710A19905.9
ChampionGrader710A19915.9
ChampionGrader710A19925.9
ChampionGrader710A19935.9
ChampionGrader710A19945.9
ChampionGrader710A19955.9
ChampionGrader710A19965.9
ChampionGrader710A19975.9
ChampionGrader710A19985.9
ChampionGrader7151976Apr-71
ChampionGrader7151976DDAD 4-71
ChampionGrader7151977Apr-71
ChampionGrader7151977DDAD 4-71
ChampionGrader7151978Apr-71
ChampionGrader7151978DDAD 4-71
ChampionGrader7151979Apr-71
ChampionGrader7151979DDAD 4-71
ChampionGrader7151980Apr-71
ChampionGrader7151980DDAD 4-71
ChampionGrader7151981Apr-71
ChampionGrader7151981DDAD 4-71
ChampionGrader7151982Apr-71
ChampionGrader7151982DDAD 4-71
ChampionGrader7151983Apr-71
ChampionGrader7151983DDAD 4-71
ChampionGrader715A1976Apr-71
ChampionGrader715A1976DDAD 4-71
ChampionGrader715A1977Apr-71
ChampionGrader715A1977DDAD 4-71
ChampionGrader715A1978Apr-71
ChampionGrader715A1978DDAD 4-71
ChampionGrader715A1979Apr-71
ChampionGrader715A1979DDAD 4-71
ChampionGrader715A1980Apr-71
ChampionGrader715A1980DDAD 4-71
ChampionGrader715A1981Apr-71
ChampionGrader715A1981DDAD 4-71
ChampionGrader715A1982Apr-71
ChampionGrader715A1982DDAD 4-71
ChampionGrader715A1983Apr-71
ChampionGrader715A1983DDAD 4-71
ChampionGrader716A19925.9
ChampionGrader716A19935.9
ChampionGrader716A19945.9
ChampionGrader716A19955.9
ChampionGrader716A19965.9
ChampionGrader716A19975.9
ChampionGrader716A19985.9
ChampionGrader7201975Jun-71
ChampionGrader7201976Jun-71
ChampionGrader7201977Jun-71
ChampionGrader7201978Jun-71
ChampionGrader7201979Jun-71
ChampionGrader7201980Jun-71
ChampionGrader7201981Jun-71
ChampionGrader7201982Jun-71
ChampionGrader7201983Jun-71
ChampionGrader7201984Jun-71
ChampionGrader7201985Jun-71
ChampionGrader7201986Jun-71
ChampionGrader7201987Jun-71
ChampionGrader7201988Jun-71
ChampionGrader72019898.3
ChampionGrader72019908.3
ChampionGrader72019918.3
ChampionGrader72019928.3
ChampionGrader72019938.3
ChampionGrader72019948.3
ChampionGrader72019958.3
ChampionGrader72019968.3
ChampionGrader72019978.3
ChampionGrader72019988.3
ChampionGrader720A1983Apr-71
ChampionGrader720A1984Apr-71
ChampionGrader720A1985Apr-71
ChampionGrader720A1986Apr-71
ChampionGrader720A1987Apr-71
ChampionGrader720A1988Apr-71
ChampionGrader720A19898.3
ChampionGrader720A1989Apr-71
ChampionGrader720A19908.3
ChampionGrader720A1990Apr-71
ChampionGrader720A19918.3
ChampionGrader720A1991Apr-71
ChampionGrader720A19928.3
ChampionGrader720A19938.3
ChampionGrader720A19948.3
ChampionGrader720A19958.3
ChampionGrader720A19968.3
ChampionGrader720A19978.3
ChampionGrader720A19988.3
ChampionGrader726A19928.3
ChampionGrader726A19938.3
ChampionGrader726A19948.3
ChampionGrader726A19958.3
ChampionGrader726A19968.3
ChampionGrader726A19978.3
ChampionGrader726A19988.3
ChampionGrader73019858.3
ChampionGrader73019868.3
ChampionGrader73019878.3
ChampionGrader73019888.3
ChampionGrader73019898.3
ChampionGrader73019908.3
ChampionGrader73019918.3
ChampionGrader73019928.3
ChampionGrader73019938.3
ChampionGrader73019948.3
ChampionGrader73019958.3
ChampionGrader73019968.3
ChampionGrader73019978.3
ChampionGrader73019988.3
ChampionGrader730A19858.3
ChampionGrader730A19868.3
ChampionGrader730A19878.3
ChampionGrader730A19888.3
ChampionGrader730A19898.3
ChampionGrader730A19908.3
ChampionGrader730A19918.3
ChampionGrader730A19928.3
ChampionGrader730A19938.3
ChampionGrader730A19948.3
ChampionGrader730A19958.3
ChampionGrader730A19968.3
ChampionGrader730A19978.3
ChampionGrader730A19988.3
ChampionGrader736A19928.3
ChampionGrader736A19938.3
ChampionGrader736A19948.3
ChampionGrader736A19958.3
ChampionGrader736A19968.3
ChampionGrader736A19978.3
ChampionGrader736A19988.3
ChampionGrader7401975Jun-71
ChampionGrader7401975N-855C
ChampionGrader7401976Jun-71
ChampionGrader7401976N-855C
ChampionGrader7401977Jun-71
ChampionGrader7401977N-855C
ChampionGrader7401978Jun-71
ChampionGrader7401978N-855C
ChampionGrader7401979Jun-71
ChampionGrader7401979N-855C
ChampionGrader7401980Jun-71
ChampionGrader7401980N-855C
ChampionGrader7401981Jun-71
ChampionGrader7401981N-855C
ChampionGrader7401982Jun-71
ChampionGrader7401982N-855C
ChampionGrader7401983Jun-71
ChampionGrader7401983N-855C
ChampionGrader7401984Jun-71
ChampionGrader7401984N-855C
ChampionGrader7401985Jun-71
ChampionGrader7401985N-855C
ChampionGrader7401986Jun-71
ChampionGrader7401987Jun-71
ChampionGrader7401988Jun-71
ChampionGrader7401989Jun-71
ChampionGrader7401990Jun-71
ChampionGrader7401991Jun-71
ChampionGrader740A1991L-10
ChampionGrader740A1991M11
ChampionGrader740A1992L-10
ChampionGrader740A1992M11
ChampionGrader740A1993L-10
ChampionGrader740A1993M11
ChampionGrader740A1994L-10
ChampionGrader740A1994M11
ChampionGrader740A1995L-10
ChampionGrader740A1995M11
ChampionGrader740A1996L-10
ChampionGrader740A1996M11
ChampionGrader740A1997L-10
ChampionGrader740A1997M11
ChampionGrader740A1998L-10
ChampionGrader740A1998M11
ChampionGrader7501987L-10
ChampionGrader7501988L-10
ChampionGrader7501989L-10
ChampionGrader7501990L-10
ChampionGrader7501991L-10
ChampionGrader7501992L-10
ChampionGrader7501993L-10
ChampionGrader7501994L-10
ChampionGrader750A1987L-10
ChampionGrader750A1988L-10
ChampionGrader750A1989L-10
ChampionGrader750A1990L-10
ChampionGrader750A1991L-10
ChampionGrader750A1992L-10
ChampionGrader750A1993L-10
ChampionGrader750A1994L-10
ChampionGrader750A1995L-10
ChampionGrader750A1995M11
ChampionGrader750A1996L-10
ChampionGrader750A1996M11
ChampionGrader750A1997L-10
ChampionGrader750A1997M11
ChampionGrader750A1998L-10
ChampionGrader750A1998M11
ChampionGrader7601975N-855C
ChampionGrader7601976N-855C
ChampionGrader7601977N-855C
ChampionGrader7601978N-855C
ChampionGrader7601979N-855C
ChampionGrader7601980N-855C
ChampionGrader7601981N-855C
ChampionGrader7601982N-855C
ChampionGrader7601983N-855C
ChampionGrader7601984N-855C
ChampionGrader7601985L-10
ChampionGrader7601985N-855C
ChampionGrader7601986L-10
ChampionGrader7601987L-10
ChampionGrader7601988L-10
ChampionGrader7601989L-10
ChampionGrader7601990L-10
ChampionGrader7601991L-10
ChampionGrader7801985L-10
ChampionGrader7801986L-10
ChampionGrader7801987L-10
ChampionGrader7801988L-10
ChampionGrader7801989L-10
ChampionGrader7801990L-10
ChampionGrader7801991L-10
ChampionGrader780A1986L-10
ChampionGrader780A1987L-10
ChampionGrader780A1988L-10
ChampionGrader780A1989L-10
ChampionGrader780A1990L-10
ChampionGrader780A1991L-10
ChampionGrader780A1992L-10
ChampionGrader780A1993L-10
ChampionGrader780A1994L-10
ChampionGrader780A1995L-10
ChampionGrader780A1995M11
ChampionGrader780A1996L-10
ChampionGrader780A1996M11
ChampionGrader780A1997L-10
ChampionGrader780A1997M11
ChampionGrader780A1998L-10
ChampionGrader780A1998M11
ChevroletMedium & Heavy-Duty TruckC Series198910400cc 10.4L V8 3208
ChevroletTruckC Series19893208
ChevroletTruckC Series19893208.0 Diesel
ChevroletTruckC Series19898200cc 8.2L N T
ChevroletMedium & Heavy-Duty TruckC Series19898200cc 8.2L V8 N
ChevroletTruckC Series19903208.0 Diesel
ChevroletTruckC Series19908200cc 8.2L N T
ChevroletMedium & Heavy-Duty TruckC Series19908200cc 8.2L V8 N
ChevroletTruckC Series19913208.0 Diesel
ChevroletTruckC Series19918200cc 8.2L N T
ChevroletTruckC Series19923208.0 Diesel
ChevroletTruckC Series19928200cc 8.2L N T
ChevroletTruckC Series19933208.0 Diesel
ChevroletTruckC Series19938200cc 8.2L N T
ChevroletTruckC619898200cc 8.2L N T
ChevroletTruckC619908200cc 8.2L N T
ChevroletTruckC619918200cc 8.2L N T
ChevroletTruckC619928200cc 8.2L N T
ChevroletTruckC619938200cc 8.2L N T
ChevroletMedium & Heavy-Duty TruckC60198910400cc 10.4L V8 3208
ChevroletMedium & Heavy-Duty TruckC6019898200cc 8.2L V8 N
ChevroletMedium & Heavy-Duty TruckC6019908200cc 8.2L V8 N
ChevroletTruckC650019898200cc 8.2L N T
ChevroletTruckC650019908200cc 8.2L N T
ChevroletTruckC6D19893208
ChevroletTruckC6D19898200cc 8.2L N T
ChevroletTruckC6D19908200cc 8.2L N T
ChevroletTruckC719893208.0 Diesel
ChevroletTruckC719898200cc 8.2L N T
ChevroletTruckC719903208.0 Diesel
ChevroletTruckC719908200cc 8.2L N T
ChevroletTruckC719913208.0 Diesel
ChevroletTruckC719918200cc 8.2L N T
ChevroletTruckC719923208.0 Diesel
ChevroletTruckC719928200cc 8.2L N T
ChevroletTruckC719933208.0 Diesel
ChevroletTruckC719938200cc 8.2L N T
ChevroletMedium & Heavy-Duty TruckC70198910400cc 10.4L V8 3208
ChevroletMedium & Heavy-Duty TruckC7019898200cc 8.2L V8 N
ChevroletMedium & Heavy-Duty TruckC7019908200cc 8.2L V8 N
ChevroletTruckC750019898200cc 8.2L N T
ChevroletTruckC750019908200cc 8.2L N T
ChevroletTruckC7D19893208
ChevroletTruckC7D19898200cc 8.2L N T
ChevroletTruckC7D19908200cc 8.2L N T
ChevroletTruckC8019898200cc 8.2L N T
ChevroletTruckC8019908200cc 8.2L N T
ChevroletTruckC850019898200cc 8.2L N T
ChevroletTruckC850019908200cc 8.2L N T
ChevroletTruckD9K19798V-71 N NE T
ChevroletTruckD9K1979NTC-290 Diesel
ChevroletTruckD9K1979NTC-350 Diesel
ChevroletTruckD9K1979NTC-400 Diesel
ChevroletTruckD9K19806V-92 T TA TTA
ChevroletTruckD9K19808V-71 N NE T
ChevroletTruckD9K1980NTC-290 Diesel
ChevroletTruckD9K1980NTC-350 Diesel
ChevroletTruckD9K1980NTC-400 Diesel
ChevroletTruckD9K19816V-92 T TA TTA
ChevroletTruckD9K19818V-71 N NE T
ChevroletTruckD9K1981NTC-290 Diesel
ChevroletTruckD9K1981NTC-350 Diesel
ChevroletTruckD9K1981NTC-400 Diesel
ChevroletTruckD9K19823406.0 Diesel
ChevroletTruckD9K19826V-71 N NE T
ChevroletTruckD9K19826V-92 T TA TTA
ChevroletTruckD9K19828V-71 N NE T
ChevroletTruckD9K1982NTC-290 Diesel
ChevroletTruckD9K1982NTC-350 Diesel
ChevroletTruckD9K1982NTC-400 Diesel
ChevroletTruckD9K19833406.0 Diesel
ChevroletTruckD9K19836V-71 N NE T
ChevroletTruckD9K19836V-92 T TA TTA
ChevroletTruckD9K19838V-71 N NE T
ChevroletTruckD9K19838V-92 T
ChevroletTruckD9K1983NTC-290 Diesel
ChevroletTruckD9K1983NTC-350 Diesel
ChevroletTruckD9K1983NTC-400 Diesel
ChevroletTruckD9K19843406.0 Diesel
ChevroletTruckD9K19846V-92 T TA TTA
ChevroletTruckD9K19848V-71 N NE T
ChevroletTruckD9K19848V-92 T
ChevroletTruckD9K1984NTC-350 Diesel
ChevroletTruckD9K19853406.0 Diesel
ChevroletTruckD9K19856V-92 T TA TTA
ChevroletTruckD9K19858V-71 N NE T
ChevroletTruckD9K19858V-92 T
ChevroletTruckD9K

Replaces These Part Numbers

AC DELCO321-641, 321-670, 321-696, 321-754, 321-755
ARROWHEADADR0142
CARGO110937, 112264, 113000, 113001
CASE22-702
CATERPILLAR0R1699
CUMMINS3004806, 3062333, 3603877, 3603877RX, 3604652, 3604652RX
DELCO10459000, 10459001, 10459004, 10459008, 10459058, 10459097, 10459108, 10459202, 10459257, 10459258, 10459259, 1117732, 1117736, 1117742, 1117800, 1117801, 1117803, 1117804, 1117806, 1117808, 1117809, 1117811, 1117812, 1117813, 1117815, 1117816, 1117820, 1117830
EUCLIDE-820121X
ForDD7HT-10300-BA, D8HZ-10346-E, D8HZ-10346-F, E4HT-10300-BA, E5HS-10300-BA, E7HS-10346-AA, E8HZ-10346-A, E9HS-10300-BA, F0HT-10300-AA, F0HT-10300-EA, F0HZ-10346-H
INTL HARVESTER521829C91, 521879C91
J&N Electrical Products400-12044, 400-12044R, 400-12447
LESTER7262, 7362, 7940, 7087
MOTORCRAFTGL-191, GL-259, GL-292
NEW HOLLANDV60510
QUICKSILVER8M6007455
REMY LIGHT DUTY51301, 53100
VERSATILEV60510
WAI7262N, 7940N
WESTERN STAR802010004
WHITEV1114255, V1114259

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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