2-3-107
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University of the People *
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2020
Subject
Mechanical Engineering
Date
Nov 24, 2024
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Pages
5
Uploaded by engminamaged1991
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
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