Cummins Westport T he Natural Choice

The Leading Natural Gas Engine For Truck And Bus. Lower Emissions, Improved Performance, Lower Costs. The ISL G is the natural choice in alternative-fuel engine technology. With industry-leading performance and first-fit OEM availability, it combines all the advantages of cleanburning, low-cost natural gas with the power and torque needed for shuttle and school bus, urban transit, vocational and medium-duty truck and tractor applications. Since the ISL G was introduced in 2007, thousands of truck and bus customers have benefited from the impressive low-end torque, transient response and quiet...

Features And Benefits.  Air/Fuel Regulation – Cummins closed-loop electronic control system based on Cummins Interact™ System. Improved sensors for engine parameters, including intake manifold pressure and temperature, fuel inlet pressure, knock detection, air/fuel ratio and fuel mass flow.   Intake System – Charge-air cooling reduces Air emissions by lowering intake manifold air temperatures.   Accessory Belt Drive System – Self-tensioning serpentine polyvee belt accessory drive system for water pump, engine-mounted fan hub and most alternators. Gear-driven air compressor with provision for...

Gearing Recommendations. Extended Coverage. For the best reliability and durability, the recommended maximum gross vehicle weight (GVW) for the ISL G is 66,000 lb (29,937 kg). Select gearing for fuel economy in regional-haul applications where engine speed is 1700-1900 rpm at optimal cruise. For vocational, transit and refuse applications, select gearing where engine speed is 1750-1900 rpm at cruise. Consult your Cummins or Cummins Westport representative to discuss specific gearing guidelines for your application. For additional peace of mind, Cummins Westport offers a variety of extended coverage...

Maintenance Intervals Maintenance Intervals ISL G Urban Transit Bus And Refuse Truck Maintenance Item Fuel Filter Coolant Filter Spark Plugs Fuel Filter Coolant Filter Spark Plugs Change Coolant Change Coolant Valve Adjustment** Valve Adjustment** Maintenance Item Follow vehicle manufacturer’s published recommendations Follow vehicle manufacturer’s published recommendations D efault interval is the hours stated. Interval is whichever comes first – hours, miles or time. *Requires natural gas engine oil (CES 20074). **Initial valve adjustment at 1,000 hours. R efer to QuickServe® Online or Owners...

101-1750 West 75th Avenue, Vancouver, B.C., Canada V6P 6G2 Phone 604-718-8100 [email protected] cumminswestport.com Bulletin 4971499 Printed in U.S.A. 3/15 ©2015 Cummins Westport Inc.