Cummins QST30-C1050 Diesel Engine 1050HP Construction Engine
Cummins QST30-C1050 diesel engine rated 783 kW (1050 HP) at 2100 rpm Peak Torque/Speed: 4629 N.m @ 1300 rpm with 30.5 L displacement for excavators, wheel loaders, cranes, drill rigs and other off-highway machines.
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What This Engine Is Built For
The Cummins QST30-C1050 is a construction diesel engine of 30.5 L with a N/A mm bore and stroke supplied by MEP Power as a complete assembly. It is rated at 783 kW (1050 HP) at 2100 rpm Peak Torque/Speed: 4629 N.m @ 1300 rpm. The engine is turbocharged and after-cooled, with a Bosch Electronic fuel system. It is built at the Chongqing Cummins Plant and carries US EPA Tier 2. Typical duty is excavators, wheel loaders, cranes, drill rigs and other off-highway machines; dry weight with flywheel and alternator is 3328 kg and the overall envelope is 1855mm*1327mm*1647mm.
Key Benefits
- Delivers 783 kW (1050 HP) at 2100 rpm Peak Torque/Speed: 4629 N.m @ 1300 rpm from 30.5 L as a factory-rated assembly.
- Turbocharged and After-cooled induction keeps charge temperature under control in continuous duty.
- Supplied to US EPA Tier 2, so the unit can be registered in markets that require it.
- Dry weight 3328 kg and envelope 1855mm*1327mm*1647mm are published so the installation can be checked before ordering.
- Published fuel consumption of 218g/Kw.h @ 2100 rpm QST30-C1050 – Technical Specification Emission makes running cost predictable.
- Starts without auxiliary aids down to -12℃.
Application Scenarios
- 20-35 t excavator power unit replacement
- Wheel loader and grader repower
- Crawler crane and drill rig drive
- Concrete pump and batching plant drive
Who It Is For
- Excavator and loader rebuilders replacing a failed power unit
- Plant hire fleets that need machines back on rent quickly
- OEM machine builders sourcing a proven engine for a new chassis
- Quarry and earthmoving contractors running machines in dusty, high-load duty
Problems It Solves
- A machine down in the middle of a job stops the whole site, not just one asset.
- Rebuilt short blocks of unknown history fail again inside the warranty window.
- Dust, vibration and long hours at high load expose any weakness in the power unit.
- Identifying the right QST30-C1050 variant from a serial number takes experience; MEP Power checks the configuration before quoting.
Specification As Published
Values below are the published data for this unit. Where a figure is not listed it was not stated by the source data sheet; ask and we will confirm before you order.
| Model | QST30-C1050 |
| Displacement | 30.5 L |
| Bore x Stroke | N/A |
| Net Weight (with flywheel and alternator) | 3328 kg |
| Overall Dimension | 1855mm*1327mm*1647mm |
| Manufacturing Plant | Chongqing Cummins Plant |
| Rated Power | 783 kW/1050HP |
| Rated Speed | 2100 rpm Peak Torque/Speed: 4629 N.m @ 1300 rpm |
| Fuel Consumption at Rated Power | 218g/Kw.h @ 2100 rpm QST30-C1050 – Technical Specification Emission |
| Certification | US EPA Tier 2 |
| Aspiration | Turbocharged and After-cooled |
| Fuel System | Bosch Electronic |
| Compression Ratio | 15.7:1 |
| Electrical System (starter motor/alternator) | 12V/24V |
| Lowest Starting Temp (without auxiliary system) | -12℃ |
Technical Features
- Displacement: 30.5 L
- Bore and stroke: N/A
- Aspiration: Turbocharged and After-cooled
- Fuel system: Bosch Electronic
- Electrical system: 12V/24V
- Compression ratio: 15.7:1
Quality Control
- Every engine is inspected by the MEP Power inspection team before it leaves the warehouse
- Engine, configuration and serial numbers are recorded and photographed for the buyer
- Genuine and OEM units are quoted separately so the buyer knows exactly what is supplied
- Warranty on genuine and OEM new engines and generator sets is one year or 1000 hours, whichever comes first; parts and repair labour are covered for quality faults inside that period.
Use and Installation Guide
- Quote the model QST30-C1050 when ordering so the correct variant is supplied.
- Confirm flywheel housing, SAE size and pump drive against the machine
- Transfer the machine's own wiring harness only after checking the connector layout
- Run the first 50 hours at moderate load before full-duty work
- Keep the warranty terms in mind: one year or 1000 hours, whichever comes first.
Customisation Options
- OEM and ODM builds, including your logo and company name on the unit
- Cummins engine customisation and modification to your requirement
- Mining and special explosion-proof builds
- Genuine or OEM parts specified on the quotation
How It Compares
| Compared with | What to consider |
|---|---|
| A rebuilt or used engine of the same rating | A rebuilt unit may show the same 783 kW (1050 HP) on paper, but its running history is unknown and the warranty rarely covers the whole engine. |
| A larger engine in the same QST30 range | Moving up a frame size adds weight, envelope and fuel burn; specify the next size up only if the duty cycle really needs the headroom. |
| A non-Cummins engine of similar output | Parts and service for Cummins families are available in most markets, which matters more over ten years than the purchase price on day one. |
QST30-C1050 Questions
Is this QST30-C1050 a genuine Cummins engine
What power does the QST30-C1050 produce
What warranty comes with the engine
How do I confirm this is the right variant for my machine
How is the engine shipped and what payment terms apply
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View specificationQuote The QST30-C1050
Send your serial number or nameplate photograph and we will confirm the configuration, then price genuine and OEM options side by side.