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Caterpillar 310135 is the 3LM turbocharger: a twin entry cast iron turbine housing with a four bolt inlet flange, and an aluminium compressor housing with an angled outlet. It is used on Caterpillar 3306 engines. This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
The same part is also sold as Caterpillar 7C7582, Caterpillar 178-0389 and Caterpillar 7N7748.
Sold as one unit. Check the number on your old part, or in the parts manual for your machine, before ordering.
| Part Type | Turbocharger |
| Replaces | Caterpillar 7N7748 |
| Turbo model | 3LM |
| Turbine inlet | Twin entry, 4 bolt |
| Engine | Caterpillar 3306 |
| Cross references | Caterpillar 7C7582, Caterpillar 178-0389, Caterpillar 310135 |
| Fits | Caterpillar 3306 engines, including the 330B excavator |
| Condition | New, aftermarket |
| Stat. HS-Code | 841480 |
| Country of Manufacture | China |
Caterpillar machines
Check the part number on your old unit before ordering.
| Caterpillar Part No.(SPM Part No.) | Fits |
|---|---|
| 7N7748(SPM-HEP-4592) | Caterpillar 3306 engines, including the 330B excavator |
| 7C7582(SPM-HEP-4592) | Caterpillar 3306 engines, including the 330B excavator |
| 178-0389(SPM-HEP-4592) | Caterpillar 3306 engines, including the 330B excavator |
| 310135(SPM-HEP-4592) | Caterpillar 3306 engines, including the 330B excavator |
What it does
Exhaust gas spins the turbine, which drives the compressor wheel on the same shaft and pushes more air into the engine. More air lets the engine burn more fuel cleanly, giving the rated power.
Where it is used
Made for the Caterpillar 3306 engines and including the 330B excavator. The full list is in the tables above.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (3 aftermarket sellers) | USD 293.17 to 316.66 | 31 Oct 2026 |
| Phessio | USD 369.00 | 1 Nov 2026 |
| SINOCMP | USD 469.00 | 31 Oct 2026 |
| MyMROmarts | USD 663.04 | 1 Nov 2026 |
| Spare Part Mart | USD 234.54 | Today |
Our price of USD 234.54 is 20% to 65% 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.
Yes, it is a direct replacement for the Caterpillar 310135 with the same fitting.
Often as long as the engine, 8,000 hours or more, when the oil and air filters are kept on schedule. Most turbos fail early from oil or dirt problems, not age.
Blue or black smoke, a whistle or siren noise, loss of power, oil in the intake or exhaust, or the shaft rubbing the housing.
Pour clean engine oil into the oil inlet and turn the shaft by hand, then crank the engine with the fuel cut until oil pressure shows. Let it idle for a minute before load.
Yes. Fit new oil and a new filter, and replace the oil feed and drain gaskets. Make sure the drain line is clear and runs downhill.
No. It is an aftermarket turbocharger made to replace the Caterpillar 310135. It is not made by the original manufacturer; the number only shows what it replaces.
Live rates for the quantity selected, delivered to your door. Confirmed at checkout.
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