OEX Alternator 24V 70A Delco 21SI Style DXA9108

The OEX DXA9108 is a new 24V alternator rated at 70A and built in a Delco 21SI style format. It suits Delco units and is listed with a twin leg alternator mount, 198mm mount centre to centre, 101mm inside mounting legs, and a 22mm shaft diameter, so it is important to match the mounting and shaft details before ordering.

This unit uses an internal regulator and is noted as 21 SI - Non Driver L Terminal. Those details matter when replacing an existing 24V charging unit, because the electrical configuration and terminal style need to align with the application as well as the physical mounting points.

OEX lists this alternator as part no. DXA9108, series 21SI, with a 70A power rating and a unit weight of 7.42kg. It is supplied new, not remanufactured, and carries a 3yr Passenger 1yr Commercial warranty, which gives buyers a clear reference point for both identification and service use.

Key Features

• 24V alternator with 70A output
• Delco 21SI style
• Internal regulator
• Twin leg alternator mount
• New unit, not remanufactured
• Part no. DXA9108

Specifications

• Brand: OEX
• Product type: Alternator
• Voltage: 24V
• Power rating: 70A
• Suits unit make: Delco
• Mount type: Twin leg
• Inside mounting legs: 101mm
• Mount centre to centre: 198mm

Confirmed fitment details

• Suits Delco units
• Series: 21SI
• Note: 21 SI - Non Driver L Terminal

Application and Buying Notes

Before ordering, check the existing alternator against the listed physical and electrical details: 24V system voltage, 70A output, Delco 21SI style, internal regulator, and the 21 SI - Non Driver L Terminal note. If your current unit differs on any of those points, it may not be the correct replacement even if the vehicle or machine appears similar.

The key mounting measurements are 101mm inside mounting legs and 198mm mount centre to centre, with a 13mm pivot hole diameter, 1/2 UNC adjusting hole diameter, and a 22mm shaft diameter. These measurements are especially important on rotating electrical parts because bracket and shaft alignment must match the existing setup.

This alternator is listed as a new OEX unit and weighs 7.42kg. That helps when comparing against the removed part, but the safest check is still the part number DXA9108 together with the Delco 21SI style and terminal note. If the old unit is unreadable, compare the mounting points, regulator type, and shaft size carefully before committing to purchase.

Warranty cover is listed as 3yr Passenger 1yr Commercial. For commercial or heavy-use applications, that distinction matters when you are assessing service expectations and scheduling maintenance. As with any charging system component, confirm the application against the part number and dimensions rather than relying on 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 DXA9108 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, Pivot Hole Diameter 13, Regulator Type Internal, Shaft Diameter 22mm, Voltage 24, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Weight 7.42kg, Product Group 1 ROTATING ELECTRICAL, Part No. DXA9108, Brand OEX, Description OEX Alternator 24V 70A Delco 21SI Style, Adjusting Hole Diameter 1/2 UNC, Pin Code IR209, Power Rating (Amp) 70, Series 21SI, Suits Unit Make Delco.

OEX Alternator 24V 70A Delco 21SI Style. Part number DXA9108 should be checked first. Listed voltage is 24. Listed output rating is 70. 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 DXA9108, 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 70 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Please confirm fitment by matching the part number DXA9108, the Delco 21SI style, the 24V 70A rating, the internal regulator, and the mounting and shaft measurements before purchase.

FAQ

What is the part number for this alternator?

The listed part number is DXA9108. For this listing, part number DXA9108 is the main reference point. Listed voltage is 24. Listed output rating is 70. Published fitment references include CATERPILLAR 120H, CATERPILLAR 12G, CATERPILLAR 12H. These details should still be checked against the original unit before ordering.

What voltage and output does this alternator have?

It is a 24V alternator with a 70A power rating. For this listing, part number DXA9108 is the main reference point. Listed voltage is 24. Listed output rating is 70. Published fitment references include CATERPILLAR 120H, CATERPILLAR 12G, CATERPILLAR 12H. 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 DXA9108 is the main reference point. Listed voltage is 24. Listed output rating is 70. Published fitment references include CATERPILLAR 120H, CATERPILLAR 12G, CATERPILLAR 12H. These details should still be checked against the original unit before ordering.

Is this alternator new or remanufactured?

It is listed as new. For this listing, part number DXA9108 is the main reference point. Listed voltage is 24. Listed output rating is 70. Published fitment references include CATERPILLAR 120H, CATERPILLAR 12G, CATERPILLAR 12H. These details should still be checked against the original unit before ordering.

What mounting measurements should be checked?

Check the twin leg mount, 101mm inside mounting legs, 198mm mount centre to centre, 13mm pivot hole diameter, 1/2 UNC adjusting hole diameter, and 22mm shaft diameter. For this listing, part number DXA9108 is the main reference point. Listed voltage is 24. Listed output rating is 70. Published fitment references include CATERPILLAR 120H, CATERPILLAR 12G, CATERPILLAR 12H. These details should still be checked against the original unit before ordering.

What warranty is listed?

The warranty listed is 3yr Passenger 1yr Commercial. For this listing, part number DXA9108 is the main reference point. Listed voltage is 24. Listed output rating is 70. Published fitment references include CATERPILLAR 120H, CATERPILLAR 12G, CATERPILLAR 12H. These details should still be checked against the original unit before ordering.