EVERY dESTInaTIon. - Cummins Engines

For MotorhoMes.The Cummins ISB XT combines the performance of350 horsepower with the industry-leading fuel economyand low cost of ownership of the legendary ISB to set anew standard for 350-horsepower motorhomes. The “XT”in its name refers to extra displacement (new 6.7 liter), extrapower for acceleration and climbing hills, and extra stoppingpower from the electrically actuated Variable GeometryTurbocharger (VGT Turbocharger) that acts like anintegrated exhaust brake.The ISB XT was developed to optimize every aspect ofthe engine’s operation, utilizing Cummins comprehensivein-house design approach to every engine system from theair intake to the exhaust system. Integration of Cumminsadvanced electronic controls, VGT Turbocharger,high-pressure fuel system, combustion technology andexhaust aftertreatment is how the ISB XT delivers on theperformance and value expectations of the motorhomeowner. And the ISB XT does it while being certified andcompliant to the toughest standards, the 2007 EPAemissions regulations.specifications350 hP/750 @ 1800 Fr 91662-rVPower (hp) torque (lb-ft)(kW) (N•m)Advertised Horsepower 350 Hp 261 kwpeAk torque 750 lb-ft 1017 N•mGoverNed speed2600 rpmClutCH eNGAGemeNt torque 400 lb-ft 542 N•mNumber of CyliNders 6oil system CApACity 4 u.s. GAlloNs 15.1 literssystem weiGHt 1,190 lb 540 kGeNGiNe (dry) 1,150 lb 522 kGAftertreAtmeNt* 40 lb 18 kG*Increase over standard muffler.Cummins is a pioneer in product improvement. Thus specifications may changewithout notice. Illustrations may include optional equipment.

Features And Benefits.The High Pressure Common Rail (HPCR) fuel system andVGT Turbocharger combine to deliver enhanceddriveability and improved fuel economy.Benefits include:■ Outstanding performance with fully integrated design– Enhanced High Pressure Common Rail fuel systemdelivers optimum balance of performance, emissionscontrol and fuel economy across the entireoperating rangeequipment that Makes A Difference.■ Cummins 15.2-cfm air compressor is standard■ Water-in-fuel sensor alerts drivers of contamination thatcould cause performance and durability problems■ RoadRelay 4 is an onboard monitoring system thatprovides the driver with trip information such as mpg,engine fault details and optional anti-theft protection– Patented VGT Turbocharger has enhanced responseand control with electric actuation for infiniteadjustment– Cummins Particulate Filter is fully integrated foruncompromising performance, reliability. Reducesparticulate matter more than 90%enhanced reliability And Durability.The Cummins ISB XT is designed for years of dependableuse in many different applications, including motorhomes.■ Directed piston cooling– Lowers piston and oil ring temperatures– Heavy-Duty engine feature– Crankcase ventilation system is electronicallymanaged for optimum efficiency and eliminatesoil carryover■ Industry-leading fuel economy– 24-valve cylinder head provides superior “breathing”– Vertical-centered injector position optimizescombustion– Cooled Exhaust Gas Recirculation lowerscombustion temperatures for reduced emissionsand optimized mpg■ Low cost of ownership– 15,000-mile (24,000 km) or 1-year oil changeintervals– “No-adjust” 150,000-mile (240,000 km)engine overhead■ Vertical-centered fuel injection– Results in uniform piston ring temperatures– Improves oil consumption control■ The VGT Turbocharger– Enhances reliability because it has only one movingpart in the hot exhaust flow■ Integrated combustion air heater– Proven durability– Eliminates the need for glow plugs or add-onstarting aids■ Combination full-flow/bypass lube oil filter– Delivers better filtration for longer component life

Coach Care. Coach Care is a network of service centers dedicatedto making every maintenance or repair event a pleasantexperience. Coach Care facilities are:■ Designed to meet the needs of motorhome owners■ Cummins distributor locations, fully certified by Cumminsand Cummins Power GenerationQuickserve ® online.The right information is priceless. Things change sorapidly today, you can’t afford to take a chance onoutdated information. Paper manuals and CD-ROMscan’t always keep pace with ever-changing partsand service information. You need the most currentinformation – continuously updated – every minute ofevery day. The Internet is the answer. QuickServe Onlineis your complete reference for Cummins parts andservice information on the Internet. For more information,contact your local Cummins distributor or log on toquickserve.cummins.com.■ 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 motorhomedestinations. Call our 1-800-DIESELS CustomerAssistance Center for locationsFor more information, check out the Coach Care section atfunroads.com.Cummins Customer support.Our Customer Care programs for motorhome buyers areunmatched by anyone else in the motorhome industry.Key elements of Cummins customer support include:■ Personalized factory assistance regarding general productand warranty support, product information, servicelocation assistance and general Cummins informationare available by calling 1-800-DIESELS Monday throughFriday from 7:00 a.m. to 7:00 p.m. EST■ The largest parts and service network in the industrywith over 3,500 authorized repair locations throughoutthe U.S. and Canada■ Certified motorhome repair locations■ Accelerated problem diagnosis at every CumminsQuickServe location■ 24/7 access to Cummins– 1-800-DIESELS (1-800-343-7357) – select Option 4 forservice location assistance any time of the day or night– Log on to everytime.cummins.com and click the“Service Locator” link in the top bar for 24-hourservice location assistance

Cummins Inc.Box 3005Columbus, IN 47202-3005U.S.A.Phone: 1-800-DIESELS (1-800-343-7357)Fax: 1-800-232-6393Internet: everytime.cummins.comBulletin 4971104 Printed in U.S.A. Rev. 9/09©2009 Cummins Inc.