Delco Remy Alternator 24V 275A 55SI Part No. 8600564

The Delco Remy 55SI alternator is a new 24V unit with a 275A power rating and part number 8600564. It is a twin leg alternator with an internal regulator, making it a substantial rotating electrical component for heavy-duty applications where high output and the correct mounting pattern are important.

Key dimensions include 101mm inside mounting legs, 198mm mount centre to centre, a 1/2 UNC adjusting hole diameter, a 13mm pivot hole diameter, and a 22mm shaft diameter. At 19.5kg, this is a large alternator and should be matched carefully to the vehicle or machine setup before purchase.

Delco Remy lists this alternator as brushless, and the unit is supplied new rather than remanufactured. The product carries a one year warranty, which gives a useful reference point for buyers comparing replacement rotating electrical parts in this output range.

Key Features

• 24V alternator
• 275A output
• 55SI series
• New unit
• Brushless design
• Internal regulator

Specifications

• Part No.: 8600564
• Brand: Delco Remy
• Product type: Alternator
• Voltage: 24V
• Power rating: 275A
• Series: 55SI
• Alternator mount: Twin leg
• Regulator type: Internal

Application guidance

• Listed fitment references include Atlas Copco, Caterpillar, Cummins, Euclid, Hitachi, John Deere, Komatsu, Liebherr, and Sandvik applications.
• Sample applications include Atlas Copco MT2010, Caterpillar 785C, 793C, 793D and 994D, Cummins QSB 6.7, Euclid R170, Hitachi EH3500 and EH3500AC-3, John Deere 548G III and 6059T, Komatsu 830E and 930-E5, Liebherr R9400, and Sandvik DR580.
• Fitment should still be checked against the exact unit part number and mounting measurements before ordering.
• The supplied fitment data is broad and includes multiple machine families, so physical comparison matters as much as model name.

Application and Buying Notes

For this alternator, the most important checks are the part number 8600564, the 24V system voltage, and the mounting dimensions of 101mm inside legs and 198mm centre to centre. Those measurements need to match the existing alternator or bracket arrangement, especially on machines where twin leg mounts and shaft dimensions must align precisely.

The 275A output is a strong clue that this is intended for heavier electrical loads, but current capacity alone does not confirm compatibility. The internal regulator, 22mm shaft diameter, 13mm pivot hole, and 1/2 UNC adjusting hole all need to be compared with the original unit or installation requirements to avoid a mismatch.

Because the unit is listed as new and weighs 19.5kg, it is worth checking handling, mounting access, and cable condition before fitting. A replacement alternator of this size should be assessed as a complete application match, not just by the brand name or series designation.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number 8600564 helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type ALTERNATOR, Unit of Measure EACH, Warranty One Year, Inside Mounting Legs 101mm, Power Rating (Amp) 275, Series 55SI, Suits Unit Make Delco, Alternator Mount Twin Leg, New / Reman. New, Weight 19.5kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. 8600564, Brand DELCO REMY, Description Delco Remy Alternator 24V 275A 55SI, Adjusting Hole Diameter 1/2 UNC, Pivot Hole Diameter 13, Regulator Type Internal, Shaft Diameter 22mm, Voltage 24, Mount Cnt to Cnt 198mm.

Delco Remy Alternator 24V 275A 55SI. Part number 8600564 should be checked first. Listed voltage is 24. Listed output rating is 275. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Twin Leg. Regulator type is Internal. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number 8600564, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a alternator in workshop, fleet, trade, agricultural, or construction service, the listed voltage 24 and output 275 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include ATLAS COPCO HURRICANE 6T 276-41B, ATLAS COPCO HURRICANE B641, ATLAS COPCO MT2010, ATLAS COPCO MT2010 2011, CATERPILLAR 785C, CATERPILLAR 793C. Even with application listings, final confirmation should still be based on the exact unit being replaced and the service requirements of the vehicle or machine.

Compatibility note: Please confirm fitment using part number 8600564, the 24V/275A specification, and the mounting and shaft measurements before ordering. Machine model names alone are not enough to verify compatibility.

FAQ

What is the part number for this alternator?

The part number is 8600564. For this listing, part number 8600564 is the main reference point. Listed voltage is 24. Listed output rating is 275. Published fitment references include ATLAS COPCO HURRICANE 6T 276-41B, ATLAS COPCO HURRICANE B641, ATLAS COPCO MT2010. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 24V alternator with a 275A power rating. For this listing, part number 8600564 is the main reference point. Listed voltage is 24. Listed output rating is 275. Published fitment references include ATLAS COPCO HURRICANE 6T 276-41B, ATLAS COPCO HURRICANE B641, ATLAS COPCO MT2010. These details should still be checked against the original unit before ordering.

Is this a new or remanufactured unit?

This alternator is listed as new. For this listing, part number 8600564 is the main reference point. Listed voltage is 24. Listed output rating is 275. Published fitment references include ATLAS COPCO HURRICANE 6T 276-41B, ATLAS COPCO HURRICANE B641, ATLAS COPCO MT2010. These details should still be checked against the original unit before ordering.

What type of mount does it use?

It uses a twin leg alternator mount. For this listing, part number 8600564 is the main reference point. Listed voltage is 24. Listed output rating is 275. Published fitment references include ATLAS COPCO HURRICANE 6T 276-41B, ATLAS COPCO HURRICANE B641, ATLAS COPCO MT2010. These details should still be checked against the original unit before ordering.

Does it have an internal regulator?

Yes. The regulator type is listed as internal. For this listing, part number 8600564 is the main reference point. Listed voltage is 24. Listed output rating is 275. Published fitment references include ATLAS COPCO HURRICANE 6T 276-41B, ATLAS COPCO HURRICANE B641, ATLAS COPCO MT2010. These details should still be checked against the original unit before ordering.

What should I check before buying?

Check the part number 8600564, the 24V system voltage, the 275A rating, and the mounting dimensions including 101mm inside mounting legs and 198mm mount centre to centre. For this listing, part number 8600564 is the main reference point. Listed voltage is 24. Listed output rating is 275. Published fitment references include ATLAS COPCO HURRICANE 6T 276-41B, ATLAS COPCO HURRICANE B641, ATLAS COPCO MT2010. These details should still be checked against the original unit before ordering.