SERVICE BULLETINNOTICE: The Type of Change and Recommended Compliance specified reflects Solar’s best judgment regarding the ServiceBulletin. All questions should be directed to your Solar Field Service Representative. Solar, Saturn, Centaur, Taurus, Mercury,Mars, Titan, SoLoNOx, and Turbotronic are trademarks of Solar Turbines Incorporated. Cat and Caterpillar are trademarks ofCaterpillar Inc. Specifications subject to change without notice.

NUMBER: 8.8/122ISSUED: October 2005REVISED:PRODUCT: AllMODEL(S): All

Specifics:

SUBJECT: FUEL INJECTOR SERVICES

Type of Change: Product Information

RecommendedCompliance: Information

Purpose:

This Service Bulletin is to communicate the availability of fuel injector services at various world-wide Solar facilities.

GENERAL INFORMATION:

The complex nature of fuel injectors, especially those for SoLoNOx™ products, requires that spe-cific procedures be followed when cleaning fuel injectors. Prolonged operation with contaminatedfuel injectors can be detrimental to engine performance, emissions, hot section components andthe fuel injectors themselves. Contaminated or plugged fuel injectors may reach a point where theycan no longer be cleaned, but rather, require extensive repair or replacement. Attempts to clean fuelinjectors “on-site”, or through 3rd party services may lead to injector damage, through the use ofimproper equipment and procedures to clean and flow test a set of fuel injectors [damage to fuelinjectors caused by attempts to clean fuel injectors through unapproved methods will not becovered under warranty]. Without proper testing, leaks and poor flow patterns may exist but notbe discovered, which in turn may result in lower performance or premature failures.

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It is important to regularly inspect the fuel and fuel system for sources of contamination; visuallyinspect the fuel injectors at the regular maintenance intervals; and watch for changes in operatingparameters such as power, T5 spread and emissions. SB 8.0/129 and SB 8.0/137 describe theseconcerns in greater detail. On all dual fuel and liquid-only fuel injectors, Solar can also quantifythe amount of plugging that is present in the liquid fuel circuits, without removing the fuel injectors,using our in situ flow kit. This service can be scheduled through your Solar district office.

The key to cleaning fuel injectors is to fully remove deposits from the internal fuel passages and notjust the visible build-up in the premix section (i.e., injectors may appear to be clean, but could stillbe plugged internally). Solar offers fuel injector services to clean and flow test fuel injectors throughproven methodology, including thermal oxidation, alkaline high frequency ultrasonic cleaners, andfully computerized injector flow test benches. Those injectors that do not pass Solar’s clean andflow procedure can be credited towards an exchange or repair option.

Please refer to Service Bulletin 1.0/115 for details on shipping parts to our worldwide facilities.Contact your local Solar district office for more information on Solar’s Fuel Injector Services.

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REFERENCES:

1. Service Bulletin 8.0/129 “Recommendations for Sourcing, Handling, Storage andTreatment of Fuels for Solar Gas Turbines”

2. Service Bulletin 8.0/137 “Revised Liquid Fuel Requirements for SoLoNOxApplications”

3. Service Bulletin 1.0/115 “Reman Repair/Exchange Worldwide Returns Procedures(Return Material Authorization (RMA) of BAAN Order (CS))”

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