VALVE MECHANISM GP 3054910 - Caterpillar

SEBE7624-01 May 19, 2001
(Revised August 2001)
U-116
A-76
O-88
beforeor
after failure PRODUCT SUPPORT PROGRAMFOR REPLACING SPRING IN THE MERLIN GERIN MASTERPACT UNIVERSAL POWER CIRCUITBREAKER ON CERTAIN 3512 AND 3516 GENERATOR SETS
4461 PS40589
This Program can be administered eitherbefore or after failure. In either case the decision whether to apply theProgram is made by the dealer. When reporting the repair, use "PS40589"as the Part number and "7755" as the Group Number. If administered beforefailure, use "56" as the Warranty Claim Description Code and use "T" asthe SIMS Description Code. If administered after failure, use "96" as theWarranty Claim Description Code and use "Z" as the SIMS Description Code. The information supplied in this serviceletter may not be valid after the termination date of this program. Donot perform the work outlined in this Service Letter after the terminationdate without first contacting your Caterpillar product analyst. This Revised Service Letter replacesthe May 19, 2001 Service Letter. Changes have been made to the AffectedProduct.TERMINATION DATE
May 31, 2003PROBLEM
The main generator circuit breaker may fail toclose after repeated operations on certain 3412, 3512, 3516, and 3516bgenerator sets in Caterpillar Power Modules. A defective spring in theMerlin Gerin Masterpact Universal Power Circuit Breakers, (112-4147, 112-3528and 157-1911) may affect the normal closing operation of the breaker.AFFECTED PRODUCT
Model Identification Number3512 24Z9536, 95793516 25Z6688-6689,6696, 6699-6700, 6705-6710, 6713, 6715-
6718, 6723, 6734, 6767, 6773-6781, 6783, 6787-6792,
6794-6801, 6803, 6805, 6807, 68103516B 7RN939, 1089, 1091,1166, 1180-1182, 1201, 1209-1211,
1213-1214, 1220, 1223-1224, 1228, 1231, 1235-1237,
1241-1242, 1246, 1251-1252, 1278, 1280, 1282, 1284,
1286-1288, 1290, 1293, 1298-1299, 1306, 1310-1311,
1316-1317, 1319, 1325, 1327-1328, 1385, 1407, 1431-
1433, 1435, 1439-1443, 1452-1453, 1456-1460, 1463,
1468, 1474, 1476, 14783412 81Z24149, 241613516 5SJ715PARTS NEEDED
Parts will be provided by the supplier at timeof rework.ACTION REQUIRED
See the attached Rework Procedure.SERVICE CLAIM ALLOWANCES
Product smu/age whichevercomes first Caterpillar Dealer Suggested Customer Suggested
Parts Labor Hrs Parts Labor Hrs Parts Labor Hrs
0-24 months 100 % * 0 0 0 0
*If the date code series iswithin the specified range:
This is a 5.0- hour job.*If the date code is outside of thespecified range:
This is a 1.0- hour job.PARTS DISPOSITION
Handle the parts in accordance with your WarrantyBulletin on warranty parts handling.Attach. (1-Rework Procedure)Rework Procedure
: This inspection and rework should ONLYbe performed by
field electrical personnel.: Always use a properly rated volt-sensingdevice to
confirm power is off.
Locate the circuit breaker mounted in the lowerpart of the switchgear cabinet.
Inspect the outside case of the circuit breakerand locate the date code on the top of the left side. See Figure A forlocation of the code label.
If the date code series is from and including00074 up to 00105, complete Step 3. Caterpillar will then contactthe supplier, Square D Company and coordinate their technician?s trip tothe facility where the power module is located. We will make every effortto schedule the necessary service on the requested date. This service willtake up to four hours per breaker to complete.
It will be necessary for the dealer?s technician to accompany the supplier?stechnician to the site to assist, as necessary, with the repair. This shouldinclude exercising all required safety procedures, including those outlinedin the notices above, and assuring that the power module is left in theoriginal operational