QSX (Tier 3)

Overview

The QSX not only meets Tier 3 and Stage IIIA emissions standards, it is the base platform to reach Tier 4 requirements as well. It uses in-cylinder technology, a simple and cost-effective solution that maintains the proven performance, dependability and durability of the QSX while operating cleanly and efficiently.

The QSX combines an advanced dual overhead cam design with proven heavy-duty components for dependability without compromise, every hour of every workday. Its unique dual overhead cam design allows the engineers at Cummins to optimize combustion efficiency, add to that our patented wastegated turbo with excellent response and powerful torque rise, and you have an engine capable of delivering optimum performance at every rpm.

Available in a range of ratings from 375-665 hp (280-496 kW), the QSX offers an impressive range of standard features. And options like REPTO (Rear Engine Power Take-Off) add functionality.

To maximize your uptime, maintenance requirements have been consolidated and service intervals extended.

To ensure that every QSX is perfectly matched to every piece of equipment, Cummins PowerMatch and Advisor are ready to provide expert assistance with your spec'ing and installation process.

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

Specifications

The high-pressure injection system and electronic controls of the QSX ensure clean, powerful and efficient operation every time. Fuel is injected at pressures of up to 30,000 psi for cleaner, more complete combustion. The intelligence of the electronic control system allows you to use a variety of fuel - even kerosene when diesel fuel isn't available.

Add to that our patented wastegated turbo with excellent response and powerful torque rise, and you have an engine capable of delivering optimum performance at every rpm. The wastegated turbo maximizes output without overboost at high speed and improves airflow at lower speeds for improved responsiveness And everything that makes this a great engine for original equipment also makes it a great engine for repowers. Every time.

Specifications.

Engine Type	In-Line, 6-Cylinder
Displacement	915 cu in	15 L*
Advertised Horsepower	375-630 hp	280-470 kW
Peak Torque	1346-1875 lb-ft	1825-2542 N•m
Bore and Stroke	5.39 in x 6.65 in	137 mm x 169 mm
Aspiration	Turbocharged and Charge Air Cooled
Oil System Capacity	48 U.S. qt	45.42 L*
Coolant Capacity	20 U.S. qt	18.9 L*
Length	56.8 in	1443 mm
Width	40.6 in	1032 mm
Height	51.1 in	1298 mm
Weight (dry)	3,200 lb	1,451 kg

* L = Liters/Litres

Engine Finder Specifications

Markets	Off-Highway Construction Mining
Certification Level	Tier 3 / Stage IIIA
Power	375 - 665 hp / 280 - 496 kW
Torque	1346 - 1875 lb-ft / 1825 - 2542 N•m

Ratings

Engine Model	Advertised hp (kW) @ rpm	Peak hp (kW) @ rpm	Peak Torque lb-ft (N•m) @ rpm
QSX 665*	665 (496) @ 2100	665 (496) @ 1900	1875 (2542) @ 1400
QSX 630*	630 (470) @ 2100	630 (470) @ 2100	1875 (2542) @ 1400
QSX 600	600 (447) @ 2100	610 (455) @ 1900	1875 (2542) @ 1400
QSX 600*	600 (447) @ 1800	600 (447) @ 1800	1875 (2542) @ 1400
QSX 560	560 (418) @ 1800	560 (418) @ 1800	1875 (2542) @ 1400
QSX 560*	560 (418) @ 1800	568 (424) @ 1700	1744 (2365) @ 1400
QSX 535	535 (399) @ 2100	589 (439) @ 1800	1873 (2540) @ 1400
QSX 535	535 (399) @ 2100	572 (427) @ 1800	1806 (2449) @ 1400
QSX 530	530 (395) @ 1800	530 (395) @ 1800	1744 (2365) @ 1400
QSX 520	520 (388) @ 2100	555 (414) @ 1800	1744 (2365) @ 1400
QSX 510**	510 (380) @ 1800	510 (380) @ 1800	1744 (2365) @ 1400
QSX 500	500 (373) @ 2100	550 (410) @ 1800	1744 (2365) @ 1400
QSX 500	500 (373) @ 2000	533 (397) @ 1800	1781 (2416) @ 1400
QSX 500**	500 (373) @ 1800	509 (380) @ 1700	1744 (2365) @ 1400
QSX 485	485 (362) @ 2100	519 (387) @ 1800	1639 (2222) @ 1400
QSX 450	450 (336) @ 2100	480 (358) @ 1800	1550 (2102) @ 1400
QSX 450	450 (336) @ 2000	480 (358) @ 1800	1550 (2102) @ 1400
QSX 450**	450 (336) @ 1800	450 (336) @ 1800	1550 (2102) @ 1400
QSX 435	435 (324) @ 2100	465 (347) @ 1800	1471 (1994) @ 1400
QSX 410	410 (306) @ 2000	410 (306) @ 2000	1346 (1825) @ 1400
QSX 400	400 (298) @ 2100	440 (328) @ 1800	1452 (1969) @ 1400
QSX 390	390 (291) @ 2000	390 (291) @ 2000	1346 (1825) @ 1400
QSX 375**	375 (280) @ 1800	375 (280) @ 1800	1346 (1825) @ 1400

All ratings are intermittent unless otherwise noted. Additional ratings may be available. Check with your Cummins distributor or dealer.

^*Indicates a restricted rating.

^**Indicates a continuous rating.

Features

Cummins QSX has these standard features:

Dual Overhead Cams - The first drives the high-pressure fuel system and the second operates the intake and exhaust valves.
Patented Wastegated Turbo - Maximizes performance at every rpm.
High-Pressure Fuel System - Up to 30,000 psi for cleaner, more complete combustion.
Quantum System Electronic Controls - Optimize engine performance. The intelligence of the system even allows you to use a variety of fuel such as kerosene when diesel fuel isn't available.
Heavy-Duty Rings, Pistons, Bearings - Built to last in excess of 21,000 hours (35% load factor) with high-strength alloys.
Engine Protection System - Early detection system minimizes potential damage and reduces downtime.
Fleetguard® ES Oil and Fuel Filters - Allow 500-hour service intervals.

Maintenance

Maintenance Intervals

The Cummins QSX was designed to minimize maintenance requirements and maximize your uptime. That's why oil drain intervals for the Cummins QSX are set for 625 hours or six months. Filters are vertically mounted for easy access and rapid changing, with no messy spills. Advanced Fleetguard® ES oil and fuel filters allow 500-hour service intervals. Polyvee belts have auto-tensioners, so they never need adjusting. Plus, with the QSX you won't need to adjust the overhead for 3,000 hours.

Dipsticks and oil fills are available from both sides of the engine. And there are three drain ports available, so you never have to worry about having access to maintenance points.

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

Brochures Available

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