QST30 for Construction (Tier 2)

Power 760 - 1200 hp
567 - 895 kW
Torque 2471 - 3750 lb-ft
3350 - 5084 N•m
Certification Tier 2 / Stage II



Available Regions

US and Canada,  Russia,  Africa & Middle East,  Mexico,  Philippines,  Singapore,  Brazil,  Bolivia,  Uruguay,  Paraguay,  Argentina,  Colombia,  Central America,  Europe,  Japan,  Korea


Cummins QST30 powers the biggest construction equipment and tackles the biggest jobs. For years, it's delivered exceptional performance and durability with low maintenance and operating costs.

Available in ratings from 760-1200 hp (567-895 kW), the QST30 uses advanced electronics and robust standard features for superior reliability and durability.

Every QST30 engine is covered by Cummins three-step warranty, one of the most comprehensive and simplest plans of the industry.

The QST30 delivers more power and more torque in a smaller package than competitive diesels. Known for its flexible calibrations, excellent power density, economical operation and exceptional uptime, the QST30 sets the standard for rugged dependable power. Every day. Every week. Every year.

The QST30 is an excellent choice to replace a number of engines - including some of our own. It has significantly more power, as much as 50% longer life-to-rebuild and better fuel economy than the Cummins V28, even though it is virtually the same size. Repowers are available with air-to-air cooling (for equipment which has to meet emissions standards) or jacket-water aftercooling (for non-emissionized equipment).

If you have an older competitive engine, you'll find that replacing it with the QST30 gives you up to 25% more power and torque, better fuel economy and longer service intervals, for increased productivity with lower costs. Every time.

Advertised Horsepower 760-1500 hp 567-1119 kW
Peak Torque 2764-4389 lb-ft 3747-5951 N•m
Cylinders 12
Oil System Capacity 94-156 U.S. qt 90-148 liters
Length 73-78.8 in 1855-2002 mm
Width 52.2-59.3 in 1327-1507 mm
Height 64.9-69.3 in 1647-1760 mm
Weight (wet) 7,337 lb 3,328 kg
Engine Model Advertised hp (kW) @ rpm Peak Torque lb-ft (N•m) @ rpm Rating Type
QST30-1200 1200 (895) @ 2100 3750(5084) @ 1400 Restricted
QST30-1100 1100 (820) @ 2100 3414 (4629) @ 1400 Intermittent
QST30-1050 1050 (783) @ 2100 3415 (4630) @ 1300 Intermittent
QST30-1050  1050 (783) @ 1900 3414 (4629) @ 1300  Intermittent
QST30-1050  1050 (783) @ 1800   3414 (4629) @ 1300  Intermittent
QST30-1000 1000 (746) @ 2100 3414 (4629) @ 1300 Intermittent
QST30-1000 1000 (746) @ 1800 3415 (4630) @ 1300 Intermittent
QST30-950 950 (709) @ 2100 3090 (4190) @ 1300 Intermittent
QST30-900 900 (671) @ 2100 2764 (3748) @ 1300 Intermittent
QST30-850 850 (634) @ 2000 2807 (3806) @ 1400 Intermittent
QST30-850 850 (634) @ 1800 2807 (3806) @ 1400 Continuous
QST30-760 760 (567) @ 2100 2471 (3350) @ 1300 Intermittent

Additional ratings may be available.  Check with your Cummins distributor or dealer.

Cummins QST30 shares the proven power cylinder design of our QSK78 engine, for reliability and durability you can count on. Here are some of the heavy-duty components that make the QST30 the right choice for your applications:

  • Holset HX60 Turbochargers - Designed for improved air handling with an extended life-to-rebuild.
  • Full-Authority Electronic Controls - Quantum System electronic engine management provides engine control and monitoring for superior performance, fuel efficiency, diagnostics and prognostics. Programmable parameters let you customize engine performance to equipment use, including:
    • Min/Max Governor
    • All-Speed Governor
    • Engine Protection
    • Multilevel Security
    • Switched Derate
    • Multiunit Synchronization
    • Programmable Intermediate Speeds
    • Remote Throttle
    • Load Profile Monitor
    • Low Idle Controls
    • Ambient Condition Derate
    • Tailshaft Governor
    • Engine Start-Up Speed Limiter
    • And much more
  • Ductile Iron Pistons - Provide increased strength and durability to handle increased cylinder pressures for longer life-to-overhaul while allowing higher ratings over larger displacement engines with aluminum pistons.
  • Bosch RP39 Fuel Pump - Highly reliable, highly durable. Provides the higher injection pressures needed for higher horsepower with lower emissions.
  • Advanced Valve Metallurgy - Exhaust valves are stelite-faced for longer life. Intake valves have a Nitride coating, with triballoy valve seats and chrome stems for reduced wear.
  • High-Capacity Oil Pump and Pan - Provide superior lubrication for longer component life and extended service intervals.
  • Swirl-Port Cylinder Head - Provides advanced airflow to reduce emissions and increase low-end torque.
  • Electric Fuel Lift Pumps - Eliminate the need for manual priming of the fuel system and provide for quicker, more reliable starts.
  • Prelub Starter - Prevents starts without oil pressure and dry starts, resulting in increased life-to-rebuild.
  • Flexplate Coupling - Factory-engineered for direct mounting of Allison DP 8962 and S 9800 transmissions.

Options include:

  • CENTINEL™ - The Advanced Engine Oil Management System from Cummins, totally eliminates oil changes when used in conjunction with an oil quality program.
  • CENSE™ Advanced Engine Monitoring - Allows you to monitor engine performance cylinder by cylinder on a real-time basis. Also provides trending charts for preventive maintenance planning.
  • Grid Heater Option - Eliminates the need for ether and will start the engine down to -20 degrees Fahrenheit.
Maintenance Intervals

The less time an engine spends in service, the more productive it is on the job. That's why Cummins QST30 engines come with a high-capacity oil pan and pump. The increased capacity, along with advanced Fleetguard oil filters, let you operate the QST30 for up to 500 hours or 12 months between oil and oil filter changes.

Also standard is our PreLub system, which prevents starts without oil pressure and dry starts, resulting in an increased life-to-rebuild on every QST30.

For complete maintenance information, please consult your Owner's Manual or Operations and Maintenance Manual.

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