QSX for Construction (Tier 2)

Overview

QSX for Construction (Tier 2)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.

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

Specifications.
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 Finder Specifications

Markets
Certification Level Tier 2 / Stage II
Power 350 - 635 hp / 261 - 474 kW
Torque 1182 - 2050 lb-ft / 1603 - 2779 N•m

Ratings

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.

Features

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

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.

Brochures Available

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Encompass Tri-Fold Mailer 3624570 Request View  Download