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Specifications
- MFR:DELCO
- FEATURE 1:100% New Heavy Duty
- FEATURE 2:6-60A press-fit avalanche diodes
- FEATURE 3:Crimp-weld diode connections
- FEATURE 4:Heavy copper conductors
- FEATURE 5:Wide-fin heat sinks
- NOTE 1:DR5174PF can be used to replace DR5173PF w/ non-avalanche diodes or DR5175PF w/ 3-avalanche diodes.
- SPECS FOR:Delco 21SI, 22SI, 23SI, 31SI, 33SI, 34SI, 35SI Series IR/EF Alternators
- SPECS:12 Volt
USED ON
- Agco (2002-2005) ** Agco Allis (1995-2000) ** Agco Gleaner (1992-2007) ** Agco Star (1995-2002) ** Agco White (1993-1997) ** Blue Bird (1996-2008) ** Buhler Genesis (2002-2007) ** Buhler Versatile (2002-2014) ** Case (1990-2005) ** Caterpillar Ag. & Ind. (1990-2011) ** Challenger (2002-2004) ** Chevrolet (1994-2002) ** Claas (1997-2001) ** Ford (1988-2003) ** Freightliner (1993-2012) ** GMC (1994-2002) ** International (1993-2008) ** John Deere (1987-2007) ** Kenworth (1988-2008) ** Mack (1986-2008) ** Massey Ferguson (1985-2009) ** Miller Applications Technology (1998-2003) ** New Holland Industrial (1993-2007) ** Peterbilt (1991-2008) ** Rogator (2000-2009) ** Steiger (1982-1986) ** Sterling Truck (1999-2008) ** Volvo (1994-2008) ** Western Star HD (1996-2007) ** White Industrial (1983-1986)
Replaces
- Delco 10469265, D3929
LESTER NUMBERS
- 7659, 7673, 8010, 8016, 8017, 8026, 8029, 8040, 8070, 8071, 8074, 8080, 8081, 8082, 8083, 8084, 8090, 8091, 8092, 8093, 8095, 8096, 8097, 8360, 8363, 8431, 8433, 8434, 8574, 8578, 8579, 8586, 8594, 8597, 8607, 8608, 8609, 8712
UNIT NUMBERS
- Agco Sisu Power 71370306; Case 1983221C1, 1987560C1; Caterpillar 0R8332, 1259597, 266-7224, 9X6796; Cummins 3604667RX, 3604667RX, 3675156RX, 3675218RX, 3675219RX, 3675221RX, 3675222RX, 3675232NW, 3675233NW, 3675233RX, 3675234NW, 3675234RX, 3675236RX, 3675243RX, 3675243RX, 3935527; Delco 10459037, 10459047, 10459141, 10459142, 10459143, 10459144, 10459145, 10459145, 10459180, 10459181, 10459182, 10459183, 10459184, 10459184, 10459187, 10459188, 10459191, 10459194, 10459195, 10459197, 10459198, 10459204, 10459206, 10459215, 10459255, 10459278, 10459279, 10459284, 10459285, 10459287, 10459288, 10459289, 10459290, 10459303, 10459318, 10459360, 10459449, 10459450, 10459481, 10459547, 10459604, 10459612, 10459613, 10461226, 10461234, 1117891, 1117898, 1117909, 1117913, 1117914, 1117932, 1117946, 1117965, 1117966, 15095471, 19010112, 19010124, 19010178, 19010180, 19011017, 19011101, 19011105, 19011107, 19011150, 19011151, 19011152, 19011154, 19011155, 19011156, 19011157, 19011158, 19011159, 19011160, 19011161, 19011162, 19011163, 19011166, 19011167, 19011169, 19011170, 19011171, 19011172, 19011173, 19011174, 19011176, 19011177, 19011178, 19011179, 19011187, 19011200, 19011202, 19011211, 19011212, 19011213, 19011214, 19011215, 19011216, 19011258, 19011260, 19011261, 19020300, 19020305, 19020308, 19020312, 19020354, 19020360, 19020362, 19020363, 19020377, 19020379, 19020385, 19020387, 19020806, 19020810, 8600048, 8600064, 8600065, 8600066, 8600112, 8600244, 8600247, 8600362, 8700004, 8700016, 8700017, 8700018; Ford 4C4O-10300-GA, 4C4O-10300-LA, 4C4Z-10346-GA, 4C4Z-10346-LA, F3HT-10300-JB, F3HZ-10346-J, F7HS-10300-AA; Ford Engineering F3HT-JB, F7HS-AA; GM 19116396; Hino 27040-2530, 27040-2540; IHC, Navistar 1677975C91; Letrika (Iskra) Tech. AAN5819, AAN5819, AAN5819, AAN5819, AAN5819, AAN5819, AAN5819; Mack Truck 21070188; New Holland 9824834; Volvo 3947447
Features & Benefits
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Precision aftermarket replacement part
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Converts alternator-generated AC current into DC current for the vehicle charging system
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Helps maintain proper battery charging and electrical system performance
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Designed to provide reliable current rectification and power distribution
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Manufactured to match original fit and function
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Designed for dependable long-term operation
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Ideal for alternator rebuilding and repair
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Cross-referenced to OEM and aftermarket part numbers
What Does an Alternator Rectifier Do?
The alternator rectifier converts the alternating current (AC) produced by the alternator stator into direct current (DC) that can be used by the vehicle's electrical system and battery. It uses a series of diodes to control the direction of electrical current, allowing the alternator to provide usable DC charging output.
A properly functioning rectifier is essential for stable alternator performance and reliable battery charging. Failed or damaged rectifier diodes can reduce alternator output, create excessive AC ripple, cause intermittent charging problems, or prevent the alternator from charging properly. Replacing a faulty rectifier is an important step in restoring proper alternator operation.
Common Signs Replacement Is Needed
Replace the alternator rectifier if you notice:
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Battery warning light illuminated
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Battery not charging properly
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Low or inconsistent charging output
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Excessive AC ripple during charging system testing
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Failed or shorted rectifier diodes
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Intermittent charging system operation
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Excessive heat or visible damage to the rectifier
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Burned, damaged, or corroded stator connections
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Rectifier failure discovered during alternator rebuilding or bench testing
Installation Recommendations
Installation should be performed by a qualified technician or experienced alternator rebuilder. Before installing the new rectifier, inspect the stator leads, rotor, voltage regulator, brushes, brush holder, slip rings, bearings, terminals, insulators, and internal wiring for signs of wear, overheating, corrosion, or damage.
Always verify the rectifier mounting configuration, terminal arrangement, stator connection points, dimensions, and electrical design before installation. Where soldering is required, use proper alternator rebuilding procedures and avoid excessive heat that could damage the rectifier or surrounding components.
After reassembly, bench-test the alternator to confirm proper charging output, diode operation, and AC ripple performance before returning the alternator to service.
While You're Rebuilding
Inspect other common wear components to help maximize charging system reliability:
Why Buy From RC Auto Electric?
RC Auto Electric specializes in alternator and starter rebuilding components for professional rebuilders, repair shops, automotive technicians, and DIY enthusiasts. Our extensive catalog includes thousands of OEM and aftermarket electrical components backed by accurate cross-reference information to help simplify part identification and reduce ordering mistakes.
Disclaimer
Compatibility information is provided as a reference only. Manufacturing revisions, production changes, and previous rebuilding modifications may affect internal alternator components. Always compare the original rectifier, mounting configuration, terminal arrangement, stator connection points, dimensions, electrical specifications, cross-reference numbers, and product photographs before installation. If you are unsure about compatibility, contact RC Auto Electric before ordering.
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