Mahle Alternator 24V 55A Twin Leg Internal Regulator Part No. MG307

The MAHLE Alternator MG307 is a new 24V unit with a 55A charge current rating and an internal regulator. It is listed with a twin leg alternator mount, 82mm inside mounting legs, and 149mm mount centre to centre, so it is the sort of unit that should be checked carefully against the existing bracket and mounting layout before purchase.

This alternator is described as dust proof and insulated return, with a double pulley, 73mm pulley outside diameter, and a pulley section noted as AA. It is also listed with 2 belts, which makes the pulley arrangement and belt alignment important points to confirm on the vehicle or machine already fitted.

The stated part number is MG307 and the unit is identified as MAHLE brand, new condition, 24V, 55A. A one year warranty is listed. Those details make the part number, voltage, amperage, and mounting dimensions the key identifiers to compare when matching a replacement alternator.

Key Features

• 24V alternator with 55A charge current
• Internal regulator type
• Twin leg alternator mount
• Double pulley fitted
• Dust proof, insulated return
• New unit with one year warranty

Specifications

• Brand: MAHLE
• Part No.: MG307
• Product type: Alternator
• Voltage: 24V
• Power rating / charge current: 55A
• Condition: New
• Unit of measure: Each
• Alternator mount: Twin leg

Fitment Information

• Explicit fitment data supplied for: CATERPILLAR M322C
• Explicit fitment data supplied for: CATERPILLAR M322C 2001
• Explicit fitment data supplied for: VOLVO MARINE/PENTA TD40
• Explicit fitment data supplied for: VOLVO MARINE/PENTA TD40 1978

Application and Buying Notes

When comparing this MG307 alternator to the unit already fitted, check the 24V system requirement first, then confirm the 55A rating, twin leg mount, and the mounting dimensions of 82mm inside legs and 149mm centre to centre. These measurements are the practical points that usually decide whether the replacement will sit correctly in the bracket and line up with the drive system.

The pulley setup also needs attention. This alternator is listed with a double pulley, AA section, 73mm outside diameter, and 2 belts. If the existing unit uses a different pulley arrangement, belt count, or offset, the alternator may not suit without further checks. The listed distance from pulley to alternator is 38.3, which is another useful point when comparing physical spacing.

Electrical configuration matters as much as the mounting pattern. The unit has an internal regulator and insulated return, so the wiring arrangement on the machine should be checked before ordering. The note also describes it as dust proof, which is a useful construction detail, but it should not be treated as a substitute for confirming the correct part number and application.

The safest approach is to match the part number MG307, then compare the mount style, hole diameters, pulley arrangement, and voltage against the removed alternator. If the old unit is damaged or unreadable, the application details provided for CATERPILLAR M322C, CATERPILLAR M322C 2001, VOLVO MARINE/PENTA TD40, and VOLVO MARINE/PENTA TD40 1978 can help guide the check, but the final decision should still rest on the physical specifications.

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 MG307 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, Inside Mounting Legs 82mm, Power Rating (Amp) 55, Pulley Section AA, Suits Unit Make Mahle, Note Dust proof, insulated return, Mount Cnt to Cnt 149mm, Insulated Return Yes.

Additional published details for cross-checking include Pulleys with double pulley, Mounting points diameter 86.0, Distance from pulley to the alternator 38.3, Packaging width 18.60, Net Weight 5719, Product Group 1 ROTATING ELECTRICAL, Part No. MG307, Brand MAHLE, Description Mahle Alternator 24V 55A, Adjusting Hole Diameter M8x1.25.

Mahle Alternator 24V 55A. Part number MG307 should be checked first. Listed voltage is 24. Listed output rating is 55. 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 AA. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number MG307, 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 55 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include CATERPILLAR M322C, CATERPILLAR M322C 2001, VOLVO MARINE/PENTA TD40, VOLVO MARINE/PENTA TD40 1978. 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 part number MG307, 24V system voltage, 55A rating, twin leg mounting, and the listed pulley and hole dimensions against the existing alternator and application details before purchase.

FAQ

What is the part number for this alternator?

The listed part number is MG307.

What voltage and output does this alternator have?

It is a 24V alternator with a 55A charge current rating.

What mounting style is listed for this unit?

It is listed as a twin leg alternator mount with 82mm inside mounting legs and 149mm mount centre to centre.

Does this alternator have an internal regulator?

Yes. The regulator type is listed as internal.

What pulley arrangement is supplied?

It is listed with a double pulley, AA pulley section, 73mm pulley outside diameter, and 2 belts.

Which applications are explicitly listed?

Explicit fitment data is supplied for CATERPILLAR M322C, CATERPILLAR M322C 2001, VOLVO MARINE/PENTA TD40, and VOLVO MARINE/PENTA TD40 1978.