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Caterpillar 344-5081 is the 24 volt heavy duty alternator with its multi groove pulley, regulator and terminal studs. It is used on Caterpillar C9.3, C13 and C18 engines. This aftermarket version has the same mounting and electrical connector as the original, so it plugs in and bolts on where the old one came off.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Alternator |
| Replaces | Caterpillar 344-5081 |
| Voltage | 24 V |
| Pulley | Multi groove (poly V) |
| Fits | Caterpillar 320D2 excavators, 924K, 938K, 966H and 972H wheel loaders and 525D and 545D skidders with the C9.3, C13 and C18 engines |
| Condition | New, aftermarket |
| Stat. HS-Code | 851150 |
| Country of Manufacture | China |
Caterpillar machines
Check the part number on your old unit before ordering.
| Caterpillar Part No.(SPM Part No.) | Fits |
|---|---|
| 344-5081(SPM-HEP-4152) | Caterpillar 320D2 excavators, 924K, 938K, 966H and 972H wheel loaders and 525D and 545D skidders with the C9.3, C13 and C18 engines |
Battery not charging
A charge warning light or flat batteries every morning point to the alternator once the belt and wiring check out.
Noise
A worn bearing whines or grinds.
Low voltage at idle
Weak output shows as dim lights and slow electrics at idle.
Fit with a new belt
Change the belt and check the tensioner when fitting the alternator.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (7 aftermarket sellers) | USD 261.00 to 463.94 | 25 Oct 2026 |
| Fab Heavy Parts | USD 269.42 | 24 Oct 2026 |
| FridayParts | USD 299.25 | 24 Oct 2026 |
| Amazon (RAREELECTRICAL) | USD 386.89 | 24 Oct 2026 |
| Spare Part Mart | USD 231.10 | Today |
Our price of USD 231.10 is 11% to 50% less than these sellers.
Found this part cheaper somewhere else? Send us the listing and we will beat it by 5% under our Price Beat Guarantee. Every order is also covered by our 30 day money back guarantee.
No. It is an aftermarket part made to fit in place of Caterpillar 344-5081. It is not made by or affiliated with Caterpillar; the Caterpillar part number is used only to show what it replaces.
It fits Caterpillar 320D2 excavators, 924K, 938K, 966H and 972H wheel loaders and 525D and 545D skidders with the C9.3, C13 and C18 engines. Machines change parts between serial number ranges, so check the number on your old part or in your parts manual.
It has the same mounting and electrical connector as the original. Check the plug and terminals match your old part, and test it before putting the machine back to work.
Yes, we ship worldwide. Shipping is calculated at checkout, and every order is covered by our 30 day money back guarantee and price beat guarantee.
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