2-3-107

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2020

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Mechanical Engineering

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Nov 24, 2024

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SERVICE BULLETIN NOTICE: The Type of Change and Recommended Compliance specified reflects Solar’s best judgment regarding the Service Bulletin. 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 of Caterpillar Inc. Specifications subject to change without notice. NUMBER: 2.3/107 ISSUED: November 1999 REVISED: PRODUCT: Mars, Taurus, and Centaur MODEL(S): All Specifics: With Direct Drive AC Start System SUBJECT: DIRECT DRIVE AC START SYSTEM OIL LEAKAGE Type of Change: Product Improvement Recommended Compliance: Earliest Convenience Purpose: This Service Bulletin announces the availability of Direct Drive AC Starter System upgrades and the kits to retrofit fielded units. This Service Bulletin also provides the recommended installation procedure for the starter motor to prevent lip seal damage. GENERAL INFORMATION: Some Direct Drive AC Starter Systems have reportedly been leaking from the following areas: Oil from the adapter housing flanges Oil or grease from the back end of the start motor Oil or grease from the motor grease supply or the relief ports Normal variations in component tolerances will result in different leakage points between similar units. SERVICE BULLETIN Page 1 of 5 NUMBER: 2.3/107
Centaur/Taurus: Figure 1 shows the potential leakage areas identified above. Leakage from these areas is most likely the result of one or some combination of the following: Damaged lip seal on the adapter housing Use of an early configuration of the adapter housing lip seal An improper adapter housing and clamp ring fit up Figure 1 Leak Paths For Centaur 40, 50, and Taurus 60, 70 Direct AC Start Adapter Assembly Mars: With Mars engines, leakage as identified above is most likely the result of a damaged lip seal on the adapter housing or using the earlier version of the adapter housing lip seal. Page 2 of 5 SERVICE BULLETIN NUMBER: 2.3/107
RECOMMENDED START MOTOR INSTALLATION PROCEDURE: In addition to hardware issues, the installation of the starter-motor can cause damage to the lip seal on the adapter housing, which can result in oil leakage. The installation of the starter-motor is a blind assembly into the starter adapter housing; through the lip seal and into the quill sleeve. When the starter-motor coupling passes by the soft lip seal, before sleeve engagement, the coupling can make contact with the lip seal causing the lip seal to be cut, scratched or torn. The Direct Drive AC Starter System has been modified to add a guide pin system that will help prevent lip seal damage (See Figure 2). For those units that do not have guide pins, use All-Thread, studs or bolts to help guide the starter-motor in place. Figure 2 Guide Pins NOTE For Centaur and Taurus product lines, it is a good practice to remove the starter motor and the starter adapter housing separately to avoid damaging the o-ring on the clamp-ring during reassembly. ACTION REQUIRED: If the Direct Drive AC Starter System is leaking it is recommended that all the leak paths, mentioned in this Service Bulletin, be addressed at the same time. SERVICE BULLETIN Page 3 of 5 NUMBER: 2.3/107
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Centaur/Taurus: A kit containing an improved lip seal, quill sleeve and clamp ring as well as instructions to rework the adapter housing, is available and can be ordered through Solar Service Parts. The kit part number for the Centaur and Taurus product lines is 1038752-XXX. (See Figure 3.) Figure 3 Mars: Order lip seal 1022447 through Solar Service Parts. Remove the start motor and then remove the starter adapter and replace the 1007421 lip seal with 1022447 lip seal as instructed below. Mars Seal Installation: NOTE For best results lay housing on a flat sturdy surface. Page 4 of 5 SERVICE BULLETIN NUMBER: 2.3/107
Improper installation could cause damage to the seal and oil leakage. Thermally fit lip seal into the starter adapter as shown: Heat seal bore to 250 F. by applying even heat. Press seal with even pressure until seal is seated. After the lip seal has been installed, the manufacturer’s information should be readable, example: USA NATIONAL 455013 on the exposed side of the lip seal, if installed correctly. (See Figure 4.) Figure 4 Mars Adapter Housing Contact your local Solar District Service Office for any assistance in installing the upgrade kit or replacing the lip seal. SERVICE BULLETIN Page 5 of 5 NUMBER: 2.3/107