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For superior performance, exceptional fuel efficiency and incredibly strong braking power, ultra-luxury motorhome owners choose Cummins ISX. Every time.

With ratings from 525-600 horsepower, the ISX delivers uncompromising performance for towing heavy loads and climbing steep mountain grades. Standard features include the patented Variable Geometry Turbocharger (VG Turbo), now with electric actuation for enhanced engine response at every rpm. While the standard Intebrake system produces over 600 braking horsepower for superior driver control on downhill slopes.

Plus, the ISX is certified and compliant to the toughest standards -- the 2007 EPA emission regulations. A Cummins-designed and built particulate filter reduces particulate matter by over 90%, and a crankcase ventilation system virtually eliminates oil carryover. Best of all, there's very little maintenance to these components, along with the rest of the engine.

Ask any owner, and they'll tell you that ISX reliability is second to none. Every ISX is backed by the most extensive customer support network in the industry, with programs like Coach Care™ to meet your service needs as you travel across North America in your motorhome.

For Cummins-branded merchandise, electronic tools, literature and more, visit our PowerStore web site.

 

Engine ModelAdvertised hp (kW)Peak Torque lb-ft (N•m) @ rpmGoverned Speed
ISX 650650 (485)1950 (2644) @ 13002100
ISX 600600 (447)1850 (2508) @ 14002100
ISX 525525 (392)1650 (2237) @ 14002000
Specifications.
Advertised Horsepower525-600 hp392-447 kW
Peak Torque1450-1850 lb-ft1966-2508 N•m
Governed Speed2000-2100 rpm
Clutch Engagement Torque1000 lb-ft1356 N•m
Number of Cylinders6
Oil System Capacity14 U.S. gallons52.9 liters
System Weight3,093 lb1,403 kg
   Engine Weight (Dry)3,021 lb1,370 kg
   Aftertreatment*72 lb33 kg

*Increase over today's muffler.

 

The ISX braking system (Intebrake) comes standard with every engine and provides driver comfort and control while reducing service brake wear. The combination of the Holset Variable Geometry Turbocharger (VG Turbo), dual overhead camshafts and integrated electronic control of the engine fan results in over 600 braking horsepower.

 

 MilesKilometers Months
Oil and Filter15,000 mi
24,000 km
12
Fuel Filter*25,000 mi
40,000 km
12
Coolant Filter50,000 mi
80,000 km
12
Overhead Adjustment500,000 mi
800,000 km
48
Coalescing Filter125,000 mi
200,000 km
24
Particulate Filter Cleaning200,000-400,000 mi
320,000-640,000 km
 

*Oil, fuel and water filters should be changed at every oil change.

See your Owner's Manual for every detail. And when it's time for maintenance, be sure to visit your authorized Cummins distributor or dealer.

Cummins ISX is fully compatible with long-life coolant/antifreeze formulas which allow changes out to 6 years. Follow maintenance guidelines recommended by the manufacturer for safe use with extended service intervals.

 

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

Complete warranty details are provided in Cummins Bulletin 3381340

Coach Care™

Coach Care is a network of service centers dedicated to making every maintenance or repair event a pleasant experience. Every Coach Care facility is:

 

  • Designed to meet the needs of motorhome owners
  • A Cummins distributor location, fully certified by Cummins
  • Certified to work on most motorhome chassis
  • Capable of performing many appliance repairs (most locations)
  • Equipped with overnight parking, electrical hookups, sanitation and sewage disposal
  • Located near America's most popular motorhome destinations. Call 1-800-DIESELS (1-800-343-7657) for locations

 

For more information, check out the Coach Care section at www.funroads.com.