Prestolite Alternator 24V 40A 110-684

The Prestolite Alternator 24V 40A, part no. 110-684, is a new unit supplied each and built for 24 volt charging systems. It carries a 40 amp power rating, an internal regulator, and a single leg alternator mount, so the key electrical and mounting details are already defined before you compare it to the vehicle or machine.

This alternator is listed with a 16 mm shaft diameter, 27 mm mount leg thickness, 5/16 UNC adjusting hole diameter, 13 mm pivot hole diameter, and 173 mm mount centre to centre. Those dimensions are the practical checkpoints that matter when matching the replacement to an existing Prestolite application.

A one year warranty is listed for this Prestolite alternator. For buyers working on rotating electrical systems, the most important checks remain voltage, amperage, regulator type, shaft size, mounting style, and the part number 110-684 rather than relying on appearance alone.

Key Features

• 24V alternator with 40A output
• New unit, supplied each
• Internal regulator
• Single leg alternator mount
• E-Coat environmental protection
• High temperature grease and seals for longer bearing life

Specifications

• Brand: Prestolite
• Part No.: 110-684
• Product type: Alternator
• Voltage: 24V
• Power rating: 40A
• New / remanufactured: New
• Regulator type: Internal
• Alternator mount: Single leg

Fitment guidance

• Supported fitment information includes CASE 850 and CASE 855 applications.
• CASE 850 applications are listed across model years including 1969 through 1979.
• CASE 850 appears as the clearest fitment family in the supplied application data.
• No additional vehicle or machine fitment should be assumed beyond the listed CASE applications.
• Confirm the existing alternator part number and mounting dimensions before ordering.

Application and Buying Notes

Before buying, compare the part number 110-684, the 24V system requirement, and the 40A rating against the unit being replaced. A 24 volt alternator will not suit a 12 volt charging system, and the internal regulator means the replacement needs to match the vehicle or machine’s charging setup as well as the physical mount.

The mounting details are just as important as the electrical rating. Check the single leg alternator mount, 27 mm mount leg thickness, 173 mm mount centre to centre, 5/16 UNC adjusting hole, and 13 mm pivot hole against the original unit. The 16 mm shaft diameter is another useful cross-check when comparing alternators that look similar at first glance.

This alternator is ignition excited and uses a not insulated return, so it needs to suit the existing charging circuit arrangement. If the original unit has a different excitation or return setup, that difference should be confirmed before fitting. The coated housing, internal regulator, and bearing protection features are useful details, but they do not replace the need to verify the application first.

For CASE equipment, the supplied application data points to CASE 850 and CASE 855 families, with CASE 850 shown across multiple years from 1969 through 1979. If your machine is outside those listed applications, use the part number and the measured dimensions to confirm compatibility rather than relying on the brand name alone.

Weight is listed at 5.74 kg, which can help when handling freight or comparing with an old alternator that has already been removed. The one year warranty is also listed, but warranty coverage does not override fitment checks, so the safest approach is to match the part number, voltage, amperage, mounting style, and return type before purchase.

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 110-684 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 27mm, Power Rating (Amp) 40, Shaft Diameter 16mm, Voltage 24, Alternator Mount Single Leg, New / Reman. New, Weight 5.74kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. 110-684, Brand PRESTOLITE, Description Prestolite Alternator 24V 40A, Adjusting Hole Diameter 5/16 UNC, Pivot Hole Diameter 13, Regulator Type Internal, Suits Unit Make Prestolite, Note Coated for environmental protection. Ignition excited. Not Insulated return., Mount Cnt to Cnt 173mm.

Prestolite Alternator 24V 40A. Part number 110-684 should be checked first. Listed voltage is 24. Listed output rating is 40. 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 110-684, 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 40 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Please confirm compatibility by matching part number 110-684, 24V system voltage, 40A output, single leg mounting, and the listed mounting dimensions against the existing alternator and application details before ordering.

FAQ

What is the part number for this Prestolite alternator?

The part number listed is 110-684.

What voltage and amperage does it have?

It is a 24V alternator with a 40A power rating.

Is this alternator new or remanufactured?

It is listed as new.

Does it have an internal regulator?

Yes. The regulator type is listed as internal.

What fitment is supplied for this alternator?

The supplied fitment information includes CASE 850 and CASE 855 applications, with CASE 850 listed across model years from 1969 through 1979.

What should I verify before buying?

Confirm the part number 110-684, 24V voltage, 40A output, single leg mount, 16 mm shaft diameter, and the listed mounting measurements against the unit being replaced.