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SPM-HEP-4778 is the Mitsubishi TD08H type turbocharger without wastegate, with a twin entry (divided) four bolt exhaust inlet flange, an aluminium compressor housing and a cast iron turbine housing. It is used on Hitachi ZAX470 (Isuzu 6WG1 engine). This aftermarket version is made to the same mounting and connections as the original, so it fits where the old one came off.
It replaces Hitachi 114400-4440 and Mitsubishi 49188-01830.
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 | Hitachi 114400-4440 |
| Turbo model | TD08H-31M |
| Engine | Isuzu 6WG1 |
| Machine | Hitachi ZAX470 |
| Turbine inlet | Twin entry, four bolt flange |
| Wastegate | No |
| Cross references | Mitsubishi 49188-01830 |
| Fits | the Isuzu 6WG1 diesel engine in the Hitachi ZAX470 excavator |
| Condition | New, aftermarket |
| Stat. HS-Code | 841480 |
| Country of Manufacture | China |
Machines
Check the part number on your old unit before ordering.
| Hitachi Part No.(SPM Part No.) | Fits |
|---|---|
| 114400-4440 / 1144004440 / Mitsubishi 49188-01830(SPM-HEP-4778) | the Isuzu 6WG1 diesel engine in the Hitachi ZAX470 excavator |
| Brand | Part No. |
|---|---|
| Hitachi | 114400-4440 |
| Mitsubishi | 49188-01830 |
All of these numbers are the same part.
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 Isuzu 6WG1 diesel engine in the Hitachi ZAX470 excavator.
We check what other aftermarket sellers charge for this same part. Their prices on the date we checked:
| Seller | Price | Checked |
|---|---|---|
| eBay (5 aftermarket sellers) | USD 440.41 to 515.00 | 1 Nov 2026 |
| SINOCMP | USD 499.00 | 1 Nov 2026 |
| Amazon (RobortStore) | USD 508.24 | 1 Nov 2026 |
| FridayParts | USD 546.00 | 1 Nov 2026 |
| Amazon (JP - Construction Machinery Parts Store) | USD 580.32 | 1 Nov 2026 |
| Amazon (Prosper-Trading) | USD 580.92 | 1 Nov 2026 |
| Spare Part Mart | USD 357.94 | Today |
Our price of USD 357.94 is 19% to 38% 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 Hitachi 114400-4440 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.
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.
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.
No. It is an aftermarket turbocharger made to replace the Hitachi 114400-4440. 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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