Mahle Alternator 24V 55A MG623 Twin Leg 8 Groove

The MAHLE MG623 is a new 24V alternator rated at 55A, supplied as an each unit for rotating electrical applications. It is a twin leg alternator with 78mm inside mounting legs, a 93.7 mounting points diameter, and 2 mounting bores with 10mm mount and adjusting holes.

This alternator is fitted with an internal regulator and a V-ribbed belt pulley with 8 grooves. The pulley outside diameter is 56mm, and the unit rotates clockwise. Those details matter when matching the alternator to the machine setup, belt profile, and mounting arrangement.

The listed part number is MG623 and the brand is MAHLE. A one year warranty is supplied. If the vehicle or machine does not have a warning light circuit, the note supplied with this unit says to connect ignition feed to the R terminal plug using a 220 Ohm 3W resistor.

The product is identified as a MAHLE alternator, 24V, 55A, and is intended for applications that need this exact electrical and mounting specification. Confirm the part number, voltage, amperage, pulley type, and mounting measurements before ordering, especially where the original unit has been modified or replaced previously.

Key Features

• 24V alternator rated at 55A
• New unit, not remanufactured
• Twin leg alternator mount
• 8 groove V-ribbed belt pulley
• Internal regulator fitted
• Clockwise rotation

Specifications

• Brand: MAHLE
• Part No.: MG623
• Item type: Alternator
• Voltage: 24V
• Power rating: 55A
• Alternator charge current: 55A
• Mount type: Twin Leg
• Number of mounting bores: 2

Verified fitment

• JCB
• JCB JS130LC
• JCB JS200LC
• JCB JS200SC
• JCB JS20MH
• JCB JS210LC/ NLC
• JCB JS220LC/ NLC
• JCB JS235

Application and Buying Notes

Before ordering, match the part number MG623 and confirm the machine uses a 24V charging system with a 55A alternator output. The mounting details also need to line up: twin leg mount, 78mm inside mounting legs, 2 mounting bores, and 10mm mount and adjusting holes.

The pulley setup is equally important. This alternator uses an 8 groove V-ribbed belt pulley with a 56mm outside diameter and clockwise rotation. If the pulley section, belt profile, or rotation direction does not match the original unit, the alternator may not suit the application even if the electrical rating appears close.

The internal regulator design and the note about the R terminal plug are practical checks for installation. If there is no warning light circuit, the ignition feed needs to be connected to the R terminal plug with a 220 Ohm 3W resistor. That wiring step should be confirmed against the existing loom and charging circuit before fitting.

This unit is listed for JCB applications including JS130LC, JS200LC, JS200SC, JS20MH, JS210LC/ NLC, JS220LC/ NLC, and JS235. Even within those machine families, it is still best practice to confirm the exact alternator specification on the machine rather than relying on model name alone.

If you are replacing an existing alternator, compare the mounting bores distance of 78.0, the mounting points diameter of 93.7, and the pulley offset of 30.5 from pulley to alternator. These measurements help check whether the replacement will align correctly with the bracket and belt system.

The warranty supplied is one year. That gives a clear purchase reference, but it does not replace the need to verify the electrical rating, mount style, and pulley arrangement for the machine you are servicing.

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 MG623 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 78mm, Power Rating (Amp) 55, Pulley Section 8 Groove, Rotation CW, Voltage 24, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Pulleys with V-ribbed belt pulley, Mounting Bores Distance 78.0, Distance from pulley to the alternator 30.5, Packaging width 18.60, Net Weight 5677, Product Group 1 ROTATING ELECTRICAL, Part No. MG623, Brand MAHLE, Description Mahle Alternator 24V 55A, Adjusting Hole Diameter 10.

Mahle Alternator 24V 55A. Part number MG623 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 8 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number MG623, 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.

Compatibility note: Confirm fitment using part number MG623 together with the 24V, 55A specification, twin leg mounting, 8 groove V-ribbed pulley, and the listed mounting measurements before ordering.

FAQ

What is the part number for this alternator?

The part number is MG623.

What voltage and output does it have?

It is a 24V alternator with a 55A power rating.

What type of mount does it use?

It uses a twin leg alternator mount and has 2 mounting bores.

What pulley setup is fitted?

It has a V-ribbed belt pulley with 8 grooves and a 56mm outside diameter.

Is the regulator internal or external?

The alternator has an internal regulator.

Which machines are listed with this part?

Verified fitment is listed for JCB, JCB JS130LC, JCB JS200LC, JCB JS200SC, JCB JS20MH, JCB JS210LC/ NLC, JCB JS220LC/ NLC, and JCB JS235.