Service Overview of ISL G engine Gloria Stewart Account Manager
ISL G Natural Gas Engine 8.9 Litre (540 cu. In.) In line 6 cylinder Charge Air Cooled (CAC) Spark ignition Three Way Catalyst Aftertreatment Manufactured by Cummins in Cummins Engine Plant- Rocky Mount, North Carolina Over 13,000 in service. Available in Blue Bird and Thomas Bus 2
Cummins 2010 Engine Aftertreatment Comparison SCR Catalyst Particulate Filter 2010 Diesel Heated Urea Tank Urea Dosing Control Unit ECM Cummins TWC Three Way Catalyst 3
Three Way Catalyst Aftertreatment Similar to catalyst on gasoline passenger cars. Packaged as a muffler. Vertical or horizontal mount. Weighs ~100 pounds Passive device No Regeneration No SCR No Maintenance O 2 Sensor 4
Maintenance Follow Cummins maintenance intervals and procedures outlined on QuickServe On Line or in Operation and Maintenance manuals Use Cummins Authorized parts Set oil drain / service intervals based on average fleet speed Default interval is the hours stated. Interval is Defined by application and average speed hours, miles or time, which ever comes first Example: Oil Drain/Service Intervals Average Vehicle Speed Kilometers Miles Hours Months School Bus 15 20mph 16,000 10,000 500 6 Truck 30 mph 24,000 15,000 500 6 Transit Bus 10-15 mph 9,650 6,000 500 6 Refuse Truck 10-15 mph 9,650 6,000 500 6 Use only natural gas engine oil per Cummins Specification (CES 200074) Check air intake every 250 hours, and use only OEM approved air filters Perform Initial Overhead Valve adjustment at 1,000 hours
Maintenance Parts ISL G Recommended Spare Parts Cummins Fleetgaurd Description Notes 4955850 Spark Plug Kit Includes Spark Plug & Coil Boot 3607140 NG5900 Filter, Fuel Maintenance item 3401544 LF9009 Filter, Oil (Fleetguard) Maintenance item 3100304 WF2071 Folter, Coolant Maintenance item, Customer specific 3100307 WF2074 Filter, Coolant Maintenance item, Customer specific Filter, Air Maintenance item, Customer specific
Cummins Westport Engines are Compatible with INSITE Diagnostic Software
All Manuals and Current Repair Information for CWI Engines Can Be Found on QSOL
Distance Limited Service Items Maintenance Procedures at 24,000 Kilometers [15,000 Miles], 1000 Hours, or 1 Year (1)(2)(6) (Section7) Overhead Set - Adjust (initial) Fuel Filter (Spin-On Type) - Change Maintenance Procedures at 72,000 Kilometers [45,000 Miles], 1500 Hours, or 18 Months (2)(6)(7)(8) (Section8) Ignition Coil (Non Shielded) - Check Spark Plugs (Non Shielded) - Replace (7) Maintenance Procedures at 96,000 Kilometers [60,000 Miles], 2000 Hours, or 2 Years (1)(2)(6) (Section9) Overhead Set - Adjust 9
For Sections not containing distance intervals, use hours or refer to the Service Intervals ISL G Engines section and Table 2 to determine distance limits. Maintenance Procedures at Daily Interval (1) Air Intake Piping - Check Crankcase Breather Tube - Check Coolant Level - Check Fan, Cooling - Check (Section3) Maintenance Procedures at 250 Hours or 3 Months (1)(2) Air Cleaner Restriction - Check Charge-Air Cooler - Check Charge-Air Piping - Check Maintenance Procedures at 500 Hours or 6 Months (1)(2) Lubricating Oil and Filters - Change (4) Catalyst Housing - Check Coolant Filter - Change (5) (Section4) (Section5) Supplemental Coolant Additive (SCA) and Antifreeze Concentration - Check (5) Radiator Pressure Cap - Check Maintenance Procedures at 1000 Hours or 1 year (1)(2) Drive Belts - Check Cooling Fan Belt Tensioner - Check Fan Hub, Belt Driven - Check Oxidation Catalyst - Check Water Pump - Check Maintenance Procedures at 2000 Hours, or 2 years (1)(2) Air Compressor Carbon Buildup - Check Cooling System - Flush (5) Turbocharger - Check Vibration Damper, Rubber - Check Fuel Filter (Spin-On Type) - Drain (3) Lubricating Oil Level - Check Radiator Hose - Check Throttle Response Test - Test (Section6) (Section10) Vibration Damper, Viscous - Check 10
Technician Training Technicians need additional training and certification to repair natural gas fuel systems. Community College Natural Gas Vehicle Institute (www.ngvi.com) Cummins Virtual College training and certification available for CWI natural gas engines. Cummins Distributor Vehicle manufacturers typically provide orientation training, but often do not require special certification for vehicle fuel systems.
Natural Gas is a Safe Fuel CNG LNG Liquid fuels Lighter than air Rises Doesn t accumulate in low places Rich mixture burns off slowly Ignites at temperatures of approx. 600 C Non toxic Odorless-detection fragrance is added Evaporates quickly Heavier than air Descends Accumulates in low places Rich mixture explodes Gas and diesel vapors ignite at approx. 200 C Toxic, especially gasoline Strong inherent odor Evaporates slowly at room temperature
Are there any special service requirements for natural gas vehicles? Yes. Dealer facilities may need to be modified to meet building and/or fire codes. Technicians need to be trained and certified on natural gas components. Fuel System Engine Cummins Westport Confidential Dec 2011
Natural Gas Shop Upgrades As a reference the National Fire Protection Agency publishes an industry standard (NFPA 30A) for NGV facilities. Also have guidelines for installation and inspection of NG fuel systems on vehicles (NFPA 52) Both are available at the website - NFPA.org Local building codes and regulations vary by location Consult with industry experts and local officials Cummins Westport Confidential Dec 2011
Natural Gas Shop Upgrades Highlights of Repair Facility Guidelines Methane Gas Detection System Sounds an alarm, deactivates heating systems, and activates a mechanical ventilation system (i.e. opens bay doors and roof vents, fans etc) Air Handler System Opens doors and circulates/evacuates air within the shop to prevent accumulation of methane Electrical Upgrades All electrical relocated to be at least 18 below the ceiling Open Flame Heater Restrictions. Methane detection Ceiling exhaust fan Cummins Westport Confidential Dec 2011