Prestolite Alternator 12V 45A 110-458

The Prestolite Alternator 12V 45A, part number 110-458, is a new alternator supplied as each unit and designed for 12 volt systems with a 45 amp power rating. It uses a single leg alternator mount, internal regulator, and bi-directional rotation, which are important checks when matching it to an existing rotating electrical setup.

This unit is listed with a 51mm mount leg thickness, 170mm mount centre to centre, a 5/16 UNC adjusting hole diameter, and a 9.5mm pivot hole diameter. The shaft dimension is 17, and the alternator weighs 4.56kg. Those dimensions are the practical identifiers to confirm before ordering, especially where physical space and bracket alignment matter.

It is described as sealed for extreme conditions and has a yellow wire IGN excite connection. The alternator is noted for various industrial applications and is suited to Prestolite unit make applications. As with any replacement alternator, matching the part number, mounting style, and electrical configuration remains the safest way to confirm suitability.

Key Features

• Prestolite 12V 45A alternator
• Part number 110-458
• New unit, supplied each
• Internal regulator
• Bi-directional rotation
• Single leg alternator mount

Specifications

• Voltage: 12V
• Power rating: 45A
• Mount leg thickness: 51mm
• Mount centre to centre: 170mm
• Adjusting hole diameter: 5/16 UNC
• Pivot hole diameter: 9.5mm
• Shaft dimension: 17
• Weight: 4.56kg

Fitment guidance

• Suited to various industrial applications
• Suits Prestolite unit make applications

Application and Buying Notes

Before ordering, compare the part number 110-458 with the alternator already fitted to the machine. The mounting arrangement is a single leg style, with a 51mm mount leg thickness and 170mm mount centre to centre, so bracket spacing and physical clearance should be checked carefully.

Electrical compatibility matters just as much as the mounting pattern. This alternator is 12V, 45A, uses an internal regulator, and has a yellow wire IGN excite connection. Those details need to line up with the existing charging circuit to avoid wiring or regulation issues.

The pivot hole diameter is 9.5mm and the adjusting hole is 5/16 UNC, so the adjustment hardware and pivot bolt arrangement should also be confirmed against the original unit. The shaft dimension is 17, which can be useful when comparing the replacement against the old alternator during inspection.

Because the listing notes various industrial applications rather than a single guaranteed vehicle or machine model, it is best treated as a part-number and specification match item. If the existing alternator is damaged or unreadable, measure the brackets, check the wiring, and compare the old unit’s dimensions before fitting this one.

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 110-458 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, Mount Leg Thickness 51mm, Power Rating (Amp) 45, Rotation Bi-Directional, Voltage 12, Alternator Mount Single Leg, New / Reman. New, Shaft Dimension 17.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. 110-458, Brand PRESTOLITE, Description Prestolite Alternator 12V 45A, Adjusting Hole Diameter 5/16 UNC, Pivot Hole Diameter 9.5, Regulator Type Internal, Suits Unit Make Prestolite, Note Sealed for extreme conditions. Yellow wire IGN excite.

Prestolite Alternator 12V 45A. Part number 110-458 should be checked first. Listed voltage is 12. Listed output rating is 45. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Single 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 110-458, 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 45 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm fitment using part number 110-458, the 12V 45A specification, the single leg mount, and the listed dimensions before purchase. If the original alternator differs in mounting, regulation type, or excite wiring, do not assume interchangeability.

FAQ

What is the part number for this Prestolite alternator?

The part number listed is 110-458. For this listing, part number 110-458 is the main reference point. Listed voltage is 12. Listed output rating is 45. Published fitment references include CUB CADET BIG COUNTRY, CUB CADET BIG COUNTRY 1996, JOHN DEERE 105. These details should still be checked against the original unit before ordering.

Is this alternator new or remanufactured?

It is a new alternator. For this listing, part number 110-458 is the main reference point. Listed voltage is 12. Listed output rating is 45. Published fitment references include CUB CADET BIG COUNTRY, CUB CADET BIG COUNTRY 1996, JOHN DEERE 105. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 12 volt alternator with a 45 amp power rating. For this listing, part number 110-458 is the main reference point. Listed voltage is 12. Listed output rating is 45. Published fitment references include CUB CADET BIG COUNTRY, CUB CADET BIG COUNTRY 1996, JOHN DEERE 105. These details should still be checked against the original unit before ordering.

What type of regulator does it use?

It uses an internal regulator. For this listing, part number 110-458 is the main reference point. Listed voltage is 12. Listed output rating is 45. Published fitment references include CUB CADET BIG COUNTRY, CUB CADET BIG COUNTRY 1996, JOHN DEERE 105. These details should still be checked against the original unit before ordering.

What mounting details should I check before buying?

Check the single leg mount style, 51mm mount leg thickness, 170mm mount centre to centre, 5/16 UNC adjusting hole diameter, and 9.5mm pivot hole diameter. For this listing, part number 110-458 is the main reference point. Listed voltage is 12. Listed output rating is 45. Published fitment references include CUB CADET BIG COUNTRY, CUB CADET BIG COUNTRY 1996, JOHN DEERE 105. These details should still be checked against the original unit before ordering.

What warranty is listed?

The listed warranty is one year. For this listing, part number 110-458 is the main reference point. Listed voltage is 12. Listed output rating is 45. Published fitment references include CUB CADET BIG COUNTRY, CUB CADET BIG COUNTRY 1996, JOHN DEERE 105. These details should still be checked against the original unit before ordering.