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SPM-HEP-4782 is the compact wastegated turbocharger with the actuator and boost hose fitted, a single entry four bolt exhaust inlet flange, an aluminium compressor housing and a cast iron turbine housing. It is used on Komatsu PC56-7 (Kubota V2403 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 Komatsu KT1G491-1701-01 and Komatsu KT1G4911701.
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 | Komatsu KT1G491-1701-01 |
| Engine | Kubota V2403-M-T; Komatsu 4D87 |
| Machine | Komatsu PC56-7, PC60 |
| Turbine inlet | Single entry, four bolt flange |
| Wastegate | Yes, actuator fitted |
| Cross references | Komatsu KT1G4911701 |
| Fits | the Kubota V2403-M-T engine used as the Komatsu 4D87 in PC56-7 and PC60 mini excavators |
| Condition | New, aftermarket |
| Stat. HS-Code | 841480 |
| Country of Manufacture | China |
Machines
Check the part number on your old unit before ordering.
| Komatsu Part No.(SPM Part No.) | Fits |
|---|---|
| KT1G491-1701-01(SPM-HEP-4782) | the Kubota V2403-M-T engine used as the Komatsu 4D87 in PC56-7 and PC60 mini excavators |
| KT1G4911701(SPM-HEP-4782) | the Kubota V2403-M-T engine used as the Komatsu 4D87 in PC56-7 and PC60 mini excavators |
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 Kubota V2403-M-T engine used as the Komatsu 4D87 in PC56-7 and PC60 mini excavators. 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 |
|---|---|---|
| Amazon (RobortStore) | USD 323.43 | 1 Nov 2026 |
| eBay (5 aftermarket sellers) | USD 346.00 to 522.00 | 1 Nov 2026 |
| SINOCMP | USD 439.00 | 1 Nov 2026 |
| Spare Part Mart | USD 311.86 | Today |
Our price of USD 311.86 is 4% to 40% 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 Komatsu KT1G491-1701-01 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.
Most failures come from oil starvation, dirty oil, or something passing through the wheels. Find the cause first: a blocked oil feed or dirty air path will kill the new turbocharger too.
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 Komatsu KT1G491-1701-01. 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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