QSX for Construction (Tier 2)

Power 350 - 635 hp
261 - 474 kW

Torque 1182 - 2050 lb-ft
1603 - 2779 N•m

Certification Tier 2 / Stage II

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Overview Construction Agriculture Mining Engines

Overview:

The QSX is designed to deliver dependable performance without compromise, every hour of every workday. With a unique dual overhead cam design that allows the engineers at Cummins to optimize combustion efficiency.

Available in a range of ratings from 350-635 hp (261-474 kW), the QSX not only meets Tier 2 and Euro Stage II emissions standards, it's advanced design can reach Tier 3 and Stage III requirements as well, with minimal changes. Maintenance has been consolidated so your QSX has less downtime, with extended service intervals. Cummins Advisor makes specifying the right standard features and operating parameters easy every time. And options like REPTO (Rear Engine Power Take-Off) add functionality.

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

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 everything that makes this a great engine for original equipment also makes it a great engine for repowers.

Advertised Horsepower	350-635 hp	261-474 kW
Peak Torque	1182-2050 lb-ft	1603-2779 N•m
Cylinders	6
Oil System Capacity	48 U.S. qt	45.42 liters
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

Engine Model	Advertised hp (kW) @ rpm	Peak hp (kW) @ rpm	Peak Torque lb-ft (N•m) @ rpm
QSX 635*	635 (474) @ 2100	680 (507) @ 1900	2050 (2780) @ 1400
QSX 600*	600 (447) @ 2100	660 (492) @ 1900	2050 (2780) @ 1400
QSX 600*	600 (447) @ 1800	625 (466) @ 1700	2050 (2780) @ 1400
QSX 560*	560 (418) @ 1800	568 (424) @ 1700	2050 (2780) @ 1400
QSX 540	540 (403) @ 2100	557 (415) @ 1900	1730 (2346) @ 1400
QSX 530	530 (395) @ 1800	530 (395) @ 1800	1706 (2313) @ 1400
QSX 525	525 (391) @ 2100	578 (431) @ 1800	1800 (2441) @ 1400
QSX 510**	510 (380) @ 1800	531 (396) @ 1700	1743 (2364) @ 1400
QSX 500	500 (373) @ 2100	550 (410) @ 1800	1743 (2364) @ 1400
QSX 475	475 (354) @ 2100	534 (398) @ 1700	1743 (2364) @ 1400
QSX 460**	460 (343) @ 1800	465 (347) @ 1600	1743 (2364) @ 1400
QSX 450	450 (336) @ 2100	450 (336) @ 2100	1690 (2292) @ 1400
QSX 435	435 (324) @ 2100	465 (347) @ 1800	1469 (1992) @ 1400
QSX 425	425 (317) @ 2100	468 (349) @ 1800	1435 (1946) @ 1400
QSX 400	400 (298) @ 2100	440 (328) @ 1800	1452 (1969) @ 1400
QSX 380	380 (283) @ 2100	380 (283) @ 2100	1163 (1577) @ 1400
QSX 360	360 (268) @ 2100	396 (295) @ 1800	1215 (1648) @ 1400
QSX 350	350 (261) @ 2100	350 (261) @ 2100	1182 (1603) @ 1400

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

^*Restricted rating.

^**Continuous rating.

Cummins QSX has standard features that other diesel engines can't even offer as options.

Dual Overhead Cams - The first drives the high-pressure fuel system and the second operates the intake and exhaust valves
High-Pressure Fuel System - Up to 30,000 psi for cleaner, more complete combustion
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, downtime
Advanced Fleetguard® ES Oil and Fuel Filters - 500-hour service intervals

Maintenance Intervals

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. 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.

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