Delco Remy Alternator 12V 170A 36SI Part No. 8600125

The Delco Remy 36SI alternator is a 12V, 170A unit with an internal regulator and a brushless design, suited to Delco applications. It is listed as new, weighs 12.16kg, and carries part number 8600125 for identification when matching against the vehicle or existing unit.

Mounting and dimensions matter on a commercial alternator, and this unit is specified with a quad leg alternator mount, 198mm mount centre to centre, 101mm inside mounting legs, and a 22mm shaft diameter. The pulley section is not applicable, which is an important point when checking whether the replacement matches the setup on the vehicle.

This alternator is temperature rated to 105°C and is covered by a one year warranty. For buyers replacing a charging system component, the most useful checks are the part number, voltage, amperage, mounting style, and shaft dimensions before ordering.

Key Features

• 12V alternator, 170A output
• 36SI series
• Internal regulator
• Brushless unit
• Quad leg mount
• New unit

Specifications

• Brand: Delco Remy
• Part No.: 8600125
• Product type: Alternator
• Voltage: 12V
• Power rating: 170A
• Series: 36SI
• Regulator type: Internal
• New / Reman.: New

Listed fitment applications

• Freightliner Century
• Freightliner Columbia
• Freightliner FL Series
• Freightliner FLB Series
• Freightliner FLC Series
• Sterling Trucks L-Line
• Western Star 4800
• Western Star 4900

Application and Buying Notes

Before ordering, compare the part number 8600125, the 12V system voltage, and the 170A output with the unit currently fitted to the truck. Alternators can share a similar appearance while differing in mount layout, shaft size, or regulator arrangement, so the 36SI series and quad leg mounting style are both important checks.

The listed dimensions are useful for confirming physical fit: 101mm inside mounting legs, 198mm mount centre to centre, 22mm shaft diameter, and 1/2 UNC / 13 adjusting hole diameter. If any of those measurements differ from the existing alternator or bracket arrangement, the unit may not suit without further verification.

This alternator is described as a brushless unit with an internal regulator and a temperature rating to 105°C. Those details help when comparing against the original charging system setup, especially on heavy vehicle applications where heat, mounting clearance, and wiring style should all be checked before purchase.

Fitment information is provided for several Freightliner, Sterling Trucks, and Western Star applications, but the safest approach is still to match the physical unit and the part number. If the original alternator is missing or unreadable, measure the mount points and shaft dimensions carefully and compare them with the figures listed here.

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 8600125 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) 170, Regulator Type Internal, Shaft Diameter 22mm, Voltage 12, Alternator Mount Quad Leg, New / Reman. New.

Additional published details for cross-checking include Weight 12.16kg, Product Group 1 ROTATING ELECTRICAL, Part No. 8600125, Brand DELCO REMY, Description Delco Remy Alternator 12V 170A 36SI, Adjusting Hole Diameter 1/2 UNC / 13, Pivot Hole Diameter 13, Pulley Section Not Applicable, Series 36SI, Suits Unit Make Delco.

Delco Remy Alternator 12V 170A 36SI. Part number 8600125 should be checked first. Listed voltage is 12. Listed output rating is 170. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Quad Leg. Regulator type is Internal. Pulley configuration is Not Applicable. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number 8600125, 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 12 and output 170 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm compatibility by matching part number 8600125, the 36SI series, 12V/170A rating, quad leg mount, and the listed dimensions against the vehicle and the existing alternator before ordering.

FAQ

What is the part number for this alternator?

The part number listed is 8600125. For this listing, part number 8600125 is the main reference point. Listed voltage is 12. Listed output rating is 170. Published fitment references include FREIGHTLINER CENTURY, FREIGHTLINER CENTURY 1988, FREIGHTLINER CENTURY 2000. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 12V alternator with a 170A power rating. For this listing, part number 8600125 is the main reference point. Listed voltage is 12. Listed output rating is 170. Published fitment references include FREIGHTLINER CENTURY, FREIGHTLINER CENTURY 1988, FREIGHTLINER CENTURY 2000. These details should still be checked against the original unit before ordering.

Is the regulator internal or external?

This alternator has an internal regulator. For this listing, part number 8600125 is the main reference point. Listed voltage is 12. Listed output rating is 170. Published fitment references include FREIGHTLINER CENTURY, FREIGHTLINER CENTURY 1988, FREIGHTLINER CENTURY 2000. These details should still be checked against the original unit before ordering.

Is this a new or remanufactured unit?

It is listed as new. For this listing, part number 8600125 is the main reference point. Listed voltage is 12. Listed output rating is 170. Published fitment references include FREIGHTLINER CENTURY, FREIGHTLINER CENTURY 1988, FREIGHTLINER CENTURY 2000. These details should still be checked against the original unit before ordering.

What mounting and shaft details are provided?

It has a quad leg alternator mount, 101mm inside mounting legs, 198mm mount centre to centre, and a 22mm shaft diameter. For this listing, part number 8600125 is the main reference point. Listed voltage is 12. Listed output rating is 170. Published fitment references include FREIGHTLINER CENTURY, FREIGHTLINER CENTURY 1988, FREIGHTLINER CENTURY 2000. These details should still be checked against the original unit before ordering.

What vehicles are listed in the fitment information?

Fitment is listed for Freightliner Century, Freightliner Columbia, Freightliner FL Series, Freightliner FLB Series, Freightliner FLC Series, Sterling Trucks L-Line, Western Star 4800, Western Star 4900, and Western Star 5800. For this listing, part number 8600125 is the main reference point. Listed voltage is 12. Listed output rating is 170. Published fitment references include FREIGHTLINER CENTURY, FREIGHTLINER CENTURY 1988, FREIGHTLINER CENTURY 2000. These details should still be checked against the original unit before ordering.