OEX Alternator 24V 175A Prestolite 8SC3157VR

The OEX Alternator 24V 175A Prestolite, part number 8SC3157VR, is a new rotating electrical unit with an internal regulator and insulated return. It is listed as a twin leg alternator mount with 212mm mount centre-to-centre and 101mm inside mounting legs, so matching the physical mounting arrangement is a key check before ordering.

This unit is rated at 24 volts and 175 amps, which places it in the heavier-duty end of the alternator range. The fitting note states the option offered has been modified and the R terminal is 1/2 system voltage, "off one phase", so the wiring arrangement should be confirmed against the vehicle or machine application before installation.

It is described as a Prestolite suit unit, with an adjusting hole diameter of 1/2 UNC and a pivot hole diameter of 13mm. The alternator weighs 13.5kg, so it is worth comparing the existing unit carefully where access is limited or the mounting hardware has previously been altered.

Key Features

• 24V, 175A alternator
• New unit
• Internal regulator
• Insulated return
• Twin leg mount
• Prestolite suit unit

Specifications

• Brand: OEX
• Product type: Alternator
• Voltage: 24V
• Power rating: 175A
• Part No.: 8SC3157VR
• Suits unit make: Prestolite
• Alternator mount: Twin leg
• Inside mounting legs: 101mm

Verified fitment guidance

• No direct vehicle or machine fitment list is provided beyond the supplied application reference to HITACHI EX3600-5.
• The fitment preview also shows HITACHI EX3600-5 model years 2003, 2004, 2005, 2006 and 2007.
• Confirm the existing alternator is a Prestolite unit before comparing the physical dimensions and terminal arrangement.

Application and Buying Notes

Before buying, compare the part number 8SC3157VR with the alternator currently fitted, then check the 24V system voltage, 175A output rating and Prestolite application. The mounting figures matter as much as the electrical rating here: 212mm mount centre-to-centre, 101mm inside mounting legs, a 1/2 UNC adjusting hole and a 13mm pivot hole are the measurements that need to line up with the replacement position.

The note on this unit is important. The R terminal is modified to 1/2 system voltage, described as "off one phase", so the charging connection should be treated carefully and matched to the vehicle or machine wiring requirements. If the original alternator uses a different terminal arrangement, do not assume this unit will connect the same way without checking.

This alternator is listed as new, not remanufactured, and has an internal regulator with insulated return. Those details affect how it is used in the charging system, especially where the original unit, loom or external regulator arrangement has been changed in the past. The 13.5kg weight also gives a useful cross-check against the removed unit if you are identifying the correct replacement.

If you are sourcing for a HITACHI EX3600-5 application, use the application information as a guide only and still verify the part number, mount style and terminal setup on the existing unit. Matching the physical dimensions and electrical specification is the safest way to avoid delays, return freight and installation issues.

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 8SC3157VR 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 3yr Passenger 1yr Commercial, Inside Mounting Legs 101mm, Power Rating (Amp) 175, Suits Unit Make Prestolite, Note The option offered has been modified, the R terminal is 1/2 system voltage 'off one phase', Mount Cnt to Cnt 212mm, Insulated Return Yes.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. 8SC3157VR, Brand OEX, Description OEX Alternator 24V 175A Prestolite, Adjusting Hole Diameter 1/2 UNC, Pivot Hole Diameter 13, Regulator Type Internal, Voltage 24, Alternator Mount Twin Leg, New / Reman. New.

OEX Alternator 24V 175A Prestolite. Part number 8SC3157VR should be checked first. Listed voltage is 24. Listed output rating is 175. 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 8SC3157VR, 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 175 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include HITACHI EX3600-5, HITACHI EX3600-5 2003, HITACHI EX3600-5 2004, HITACHI EX3600-5 2005. 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: Confirm fitment by matching the part number 8SC3157VR, the Prestolite unit type, the 24V 175A rating and the mounting and terminal details before purchase. Application references should always be checked against the alternator already fitted to the vehicle or machine.

FAQ

What is the part number for this alternator?

The part number is 8SC3157VR.

What voltage and output does it have?

It is a 24V alternator rated at 175A.

Is this alternator new or remanufactured?

It is listed as new.

What mounting details should be checked before ordering?

Check the twin leg mount, 212mm mount centre-to-centre, 101mm inside mounting legs, 1/2 UNC adjusting hole and 13mm pivot hole.

What type of regulator does it use?

It has an internal regulator and insulated return.

What fitment information is supplied?

The supplied application reference includes HITACHI EX3600-5, with sample years shown from 2003 through 2007. No broader verified fitment list is provided.