3-0-100

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University of the People *

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2020

Subject

Mechanical Engineering

Date

Nov 24, 2024

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pdf

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5

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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: 3.0C/100 ISSUED: September 1977 REVISED: PRODUCT: Centaur MODEL(S): Generator Specifics: GS 4000 with AC Electric Fuel Pump SUBJECT: RETROFIT OF LIQUID FUEL SYSTEM PRODUCT SAFETY Type of Change: Product Safety, Campaign Retrofit Recommended Compliance: Immediate Purpose: This Bulletin announces a potentially dangerous condition which exists in the fuel system on the above units and the procedure necessary to correct the problem. The changes suggested here are of a mandatory nature. Accomplishment of this Service Bulletin by Solar Service Representatives requires notice by owner as to date and time of equipment availability. GENERAL INFORMATION: High vibration levels have been experienced on the 1/2-inch rigid metal tubing fuel lines between the AC electric-motor driven main fuel pump and the fuel control. To reduce the vibration and prevent possible fuel line failure, the fuel pump electrical control circuit will be revised to re-sequence the turn on point of the AC motor driven fuel pump. The rigid fuel line SERVICE BULLETIN Page 1 of 5 NUMBER: 3.0C/100
will be replaced with special high temperature resistant flexible lines. After these two modifications have been completed, normal operations can be resumed. Subsequent to these modifications, the existing AC motors will be retrofitted with an improved model which incorporates a stronger cast iron case. This is an additional requirement which is felt to be necessary to insure that safe vibration levels are maintained in this system. The AC motor retrofit will occur at a later date because of lead time to procure the motors, and will be subject to further notification. ACTION REQUIRED: Contact your local Solar Power Support district office for an appointment to have the first part of this retrofit completed. An appointment for the second part of the retrofit of the AC motor will be arranged by your Solar district Power Support office at a later date when parts are available. Enclosed are instructions with illustrations which should be used when future maintenance is per- formed on the packages. Insert these pages in your OMI under fuel system and use them whenever maintenance on the lines is required. INSTALLATION PROCEDURE, HIGH TEMPERATURE FLEXIBLE FUEL LINES (SEE FIGURE 1 AND FIGURE 2) (This procedure, derived from Service Bulletin No. 3.0C/100, which replaced rigid fuel lines with flexible lines, replaces the existing procedure in the Operation and Maintenance instructions for the generator set.) 1. Install 90-degree elbow, P/N 23607Rl on the discharge fitting of pump, and 90-degree elbow, P/N 23920R1 on the inlet fitting of the fuel control. THIS IS A CRITICAL STEP. IF THE FUEL LINE IS NOT POSITIONED AS SHOWN IN FIGURE 2 AND EXCESSIVE PRELOAD IS ALLOWED TO BE APPLIED TO THE 90-DEGREE ELBOW IT MAY CAUSE FAILURE OF THIS PART. 2. Position the 90-degree elbow as shown in Figure 1 so that no preloading is applied to the fitting. Page 2 of 5 SERVICE BULLETIN NUMBER: 3.0C/100
ENSURE THAT LINES ARE PLACED SO THAT NO CHAFING CAN OC- CUR BETWEEN THE LINES AND ANY OBJECT ON THE PACKAGE. 3. Install flexible lines (hoses). These are identical and can be used in either location. 4. Lubricate and torque all the 1/2-inch fittings to 24-29 ft.-lb. (32.5 to 39.3 Nm). SERVICE BULLETIN Page 3 of 5 NUMBER: 3.0C/100
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