344-5081 24V 115A Alternator for Cat C7.1 C9.3 C4.4 Engine

344-5081 24V 115A Alternator for Cat Engine

The 344-5081 alternator is a Caterpillar charging alternator used in heavy equipment electrical charging systems. Cat official parts information identifies 344-5081 as a 24 Volt 115 Amp heavy duty alternator, and this page focuses on the 344-5081 and 3445081 alternator signal for Caterpillar engine and equipment service.

Aftermarket references commonly connect this alternator with Cat excavator and construction equipment model references such as 320D2, 323D2, 336, 340 and 345, as well as Cat engine references including C7.1, C9.3 and C4.4. Because alternator output, pulley type, regulator layout, plug design and mounting structure may vary by machine configuration, final fitment should be verified by the old alternator label and physical structure before ordering.

Product Information

Cross Reference and Number Format

The main part number for this product page is 344-5081. The format 3445081 is the non-hyphen writing format and is commonly used in aftermarket searches, catalog listings and buyer inquiries.

Common cross reference numbers include 20R-0958, 20R0958, 0124655076 and 0124655297. Some aftermarket catalogs may also mention T412091, ALT10813, CA3445081, CA20R0958 or 366-2756 as related alternator references.

These references should be used as identification support, not as automatic interchange confirmation. Alternators with related numbers may still have different pulley, regulator, plug, terminal or mounting details.

Cat Engine Application Notes

The 344-5081 alternator is commonly searched for Caterpillar engine charging system service. Public aftermarket references connect this alternator with Cat engine references such as C7.1, C9.3, C9.3B and C4.4.

Some broader supplier references also mention C13, C15, C18, C27 and C32 engine families. These should be treated as catalog references only unless the old alternator label and physical structure match the replacement unit.

Cat Equipment Model References

This alternator is often searched for Cat excavator and construction equipment repairs. Common model references include 320D2, 323D2, 336, 340 and 345 excavators. Some supplier listings also mention loader, dozer and forestry machine references, depending on alternator configuration.

Model references should be used for initial search matching only. The old alternator label, machine serial number, voltage, amperage, pulley, connector and mounting layout should be checked before ordering.

Technical Identification Points

• Confirm the alternator label shows 344-5081, 3445081 or a matching cross reference.

• Check whether the machine charging system requires a 24V alternator.

• Verify the 115A current rating before replacement.

• Compare pulley grooves, pulley offset and pulley diameter with the old alternator.

• Check the B+ terminal, plug type, regulator position and wiring layout.

• Compare mounting ear width, bolt hole size and bracket position before installation.

Common Failure Symptoms

• Battery warning light stays on during machine operation.

• Battery voltage remains low after the engine is running.

• The battery cannot stay charged after normal work cycles.

• Machine electrical components become weak, unstable or intermittent.

• Abnormal noise appears from the alternator bearing or pulley area.

• Burning smell, overheating or visible damage appears around the alternator.

• Repeated belt wear occurs because of pulley misalignment or bearing resistance.

Troubleshooting Before Replacement

Before replacing the 344-5081 alternator, inspect the complete charging circuit. Battery failure, poor grounding, belt slip, damaged wiring or charging relay problems can create symptoms similar to alternator failure.

• Check battery condition and terminal connection.

• Measure charging voltage with the engine running.

• Inspect alternator belt tension, pulley alignment and belt wear.

• Check the B+ cable, ground cable, plug connector and charging relay circuit.

• Inspect whether oil, dust or water has entered the alternator body.

• Compare the old alternator part number and physical layout with the replacement alternator.

Installation and Maintenance Notes

• Disconnect the battery before removing the alternator.

• Clean the mounting bracket and check that the alternator sits correctly.

• Install the belt with the correct tension and pulley alignment.

• Tighten electrical terminals securely and protect them from short circuit risk.

• After installation, check charging voltage and battery warning light status.

• Recheck belt tension after initial operation if the belt was replaced.

• Avoid operating the machine with loose battery cables or unstable charging voltage.

FAQ

What is 344-5081?

344-5081 is a Caterpillar alternator part number used for heavy equipment charging system applications.

Is 3445081 the same as 344-5081?

Yes. 3445081 is the non-hyphen writing format of 344-5081 and is commonly used in aftermarket searches and catalog listings.

Is this product an alternator or a starter motor?

It should be described as an alternator or charging generator. It should not be described as a starter motor.

What voltage and amperage are commonly listed?

Cat official parts information lists 344-5081 as a 24 Volt 115 Amp heavy duty alternator.

What are the common cross reference numbers?

Common references include 20R-0958, 20R0958, 0124655076 and 0124655297. Some catalogs may also mention T412091, ALT10813 or CA3445081. Final interchange should be checked by old alternator label and structure.

Which Cat models are common references?

Common model references include Cat 320D2, 323D2, 336, 340 and 345 excavators. These model references should be verified by machine serial number and old alternator label.

What should be checked before ordering?

Check the old alternator label, 24V specification, 115A output, pulley grooves, pulley offset, plug type, B+ terminal, regulator layout and mounting hole position before ordering.