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Gearing Recommendations. <br />For the best reliability and durability, the recommended <br />maximum gross vehicle weight (GVW) for the ISL G is <br />66,000 lb (29,937 kg). Select gearing for fuel economy <br />in regional -haul applications where engine speed is <br />1700-1900 rpm at optimal cruise. For vocational, transit <br />and refuse applications, select gearing where engine <br />speed is 1750-1900 rpm at cruise. Consult your Cummins <br />or Cummins Westport representative to discuss specific <br />gearing guidelines for your application. <br />Optimizing Performance With PowerSpec."" <br />-ummins PowerSpec helps you find the ideal gearing <br />specs for engine performance or fuel economy, making <br />it possible to tailor the operation of Cummins Westport <br />engines to fit every customer's application. PowerSpec <br />can also read fault codes, and can be programmed to <br />collect trip information for multiple drivers. PowerSpec <br />works on both ISL G and ISX12 G engines. See <br />cumminsengines.com/powerspec for more information. <br />Base Warranty. <br />Cummins Westport engines <br />feature the same factory base <br />warranty coverage as Cummins <br />diesel engines. For transit bus <br />and shuttle engines, a standard <br />2-year/unlimited-mileage/kilometers warranty with full <br />parts and labor coverage on warrantable failures" applies. <br />For school bus engines, standard coverage is 5 years/ <br />100,000 miles (160,934 km), whichever comes first. <br />Major components are covered for 3 years/300,000 miles <br />(482,803 km), whichever comes first. <br />For truck customers, full engine coverage is provided <br />for 2 years/250,000 miles (402,336 km), whichever <br />comes first. <br />"Warrantable failures are those due to defects in materials <br />or workmanship. <br />Extended Coverage. <br />For additional peace of mind, Cummins Westport offers <br />a variety of extended coverage plans to meet every <br />customer's need. For full extended coverage plan details, <br />contact your local Cummins distributor or Cummins <br />Westport representative. <br />Better Customer Care. <br />Cummins Westport -powered <br />vehicles are supported by <br />Cummins service network, the <br />largest and most capable in North <br />America. Cummins -authorized <br />technicians are fully trained on Cummins Westport natural <br />gas engines, with ready access to Genuine Cummins <br />parts and warranty support. For questions regarding your <br />Cummins Westport engine or for assistance in finding <br />a repair facility in the United States or Canada, call <br />Cummins Care at 1-800-DIESELS" (1-800-343-7357). <br />Cummins Westport —The Natural Choice. <br />Cummins Westport Inc. designs, engineers and markets <br />6- to 12-liter spark -ignited natural gas engines for <br />commercial transportation applications such as trucks and <br />buses. Our dedicated 100 percent natural gas engines are <br />manufactured by Cummins, and are available as a factory - <br />direct option from leading truck and bus manufacturers. <br />The Natural Gas Academy. <br />To learn more about natural gas engines for transportation, <br />and how natural gas can work for your fleet, visit the <br />Cummins Westport Natural Gas Academy online. You'll find <br />videos, information and resources about engines, OEM <br />availability, fuel systems, refueling, maintenance and more: <br />cum minswestport.com/natural-gas-academy <br />