Prestolite Alternator 24V 185A BLD4108M

The Prestolite BLD4108M is a new 24V alternator rated at 185A, supplied as an OE product in the rotating electrical category. It uses an internal regulator, clockwise rotation and an insulated return, making the electrical and mounting details important to check before purchase.

This unit is listed with a twin leg alternator mount, inside mounting legs of 101mm, and a centre-to-centre mount dimension of 215mm. The shaft diameter is 22mm, the adjusting hole diameter is 1/2 UNC, and the pivot hole diameter is 13mm, so it is a specification-driven replacement rather than a universal fit item.

The alternator is identified as Prestolite part number BLD4108M and is described as a 24V 185A unit. It weighs 16.38kg and has no applicable pulley section listed, so the mounting arrangement and drive setup should be confirmed carefully against the existing alternator before ordering.

Key Features

• OE product
• New alternator
• 24V output
• 185A power rating
• Internal regulator
• Twin leg mount

Specifications

• Brand: Prestolite
• Part No.: BLD4108M
• Product type: Alternator
• Voltage: 24V
• Power rating: 185A
• Regulator type: Internal
• Rotation: CW
• New / reman.: New

Application and Buying Notes

Before ordering, match the Prestolite part number BLD4108M and confirm the alternator mount is twin leg with 101mm inside mounting legs and 215mm centre-to-centre spacing. Those mounting measurements are the quickest way to rule in or rule out a direct replacement when the vehicle application is not fully listed.

Electrical setup matters just as much as the physical fit. This unit is 24V, 185A, with an internal regulator and insulated return, so it should only be selected where those details align with the existing charging system. The note also states self-excitation is optional, and that Sense, Lamp and R terminals can be used in dual alternator applications.

The shaft diameter is 22mm, the adjusting hole is 1/2 UNC, and the pivot hole is 13mm, so the brackets and hardware need to suit those dimensions. The pulley section is marked Not Applicable, which means the existing drive arrangement should be checked against the alternator already on the machine before the part is fitted.

At 16.38kg, this is a substantial component and should be handled as a complete rotating electrical unit. If the original alternator shows a different mounting style, regulator arrangement, rotation direction or shaft size, it is better to verify the application first rather than assume interchange from appearance alone.

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 BLD4108M 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 36 Months 500000kms, Inside Mounting Legs 101mm, Power Rating (Amp) 185, Regulator Type Internal, Shaft Diameter 22mm, Voltage 24, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Weight 16.38kg, Product Group 1 ROTATING ELECTRICAL, Part No. BLD4108M, Brand PRESTOLITE, Description Prestolite Alternator 24V 185A, Adjusting Hole Diameter 1/2 UNC, Pivot Hole Diameter 13, Pulley Section Not Applicable, Rotation CW, Suits Unit Make Prestolite.

Prestolite Alternator 24V 185A. Part number BLD4108M should be checked first. Listed voltage is 24. Listed output rating is 185. 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. 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 BLD4108M, 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 185 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm compatibility by checking Prestolite part number BLD4108M, the 24V 185A rating, twin leg mounting, 101mm inside mounting legs, 215mm centre-to-centre spacing, and the CW rotation before purchase.

FAQ

What is the part number for this alternator?

The listed part number is BLD4108M. For this listing, part number BLD4108M is the main reference point. Listed voltage is 24. Listed output rating is 185. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 24V alternator rated at 185A. For this listing, part number BLD4108M is the main reference point. Listed voltage is 24. Listed output rating is 185. These details should still be checked against the original unit before ordering.

Is this a new unit or a remanufactured unit?

It is listed as new. For this listing, part number BLD4108M is the main reference point. Listed voltage is 24. Listed output rating is 185. These details should still be checked against the original unit before ordering.

What regulator type does it use?

It uses an internal regulator. For this listing, part number BLD4108M is the main reference point. Listed voltage is 24. Listed output rating is 185. These details should still be checked against the original unit before ordering.

What mounting details are provided?

It has a twin leg alternator mount, 101mm inside mounting legs, and 215mm mount centre-to-centre spacing. For this listing, part number BLD4108M is the main reference point. Listed voltage is 24. Listed output rating is 185. These details should still be checked against the original unit before ordering.

What should I check before buying?

Check the part number BLD4108M, the 24V 185A rating, CW rotation, shaft diameter of 22mm, and the twin leg mounting dimensions against the existing unit. For this listing, part number BLD4108M is the main reference point. Listed voltage is 24. Listed output rating is 185. These details should still be checked against the original unit before ordering.