40003 55 Mariner SCREW, TRIM TAB (35MM)

August 16, 2001
U-217
A-147
O-160
beforeor
after failure PRODUCT SUPPORT PROGRAMFOR REPLACING THE RELAY IN CERTAIN 3400 AND 3500 SERIES GENERATOR SET ENGINES
4491 PS40621
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 "PS40621"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.TERMINATION DATE
August 31, 2002PROBLEM
An 81-frequency relay on the power module switchgearmay not operate because of a potential problem with a thumbwheel switch.Due to an assembly error by the manufacturer, position 7 of the thumbwheelswitch may not make proper contact. The trip point adjustment for the relayis accomplished by setting the four switches to the corresponding desiredfrequency.AFFECTED PRODUCT
Model Identification Number3412C BAK153,1583508B 6PN679,682, 6843512 24Z98723512B 8RM550-551,557-558, 564, 596PM3512B BNR268-271, 274-275,278, 281, 2843516 25Z6843,6846, 6849, 6854-6855, 6951, 6953, 6955, 6958-69593516B 1NW133 6HN733, 742, 1372 7RN1426, 1429, 1431-1433, 1435, 1442-1443, 1445, 1451-1454, 1456-1460, 1463, 1468, 1474, 1476, 1478, 1482-1483, 1488, 1490, 1499, 1502, 1505, 1508-1509, 1512-1514, 1516-1524, 1527, 1530-1535, 1537-1538, 1541-1550, 1553-1554, 1557-1558, 1562, 1571, 1584-1589, 1593, 1595, 1597-1601, 1603-1606, 1609-1610, 1614, 1617-1626, 1629-1631, 1634, 1637-1638, 1641-1642, 1644-1645, 1648-1649, 1651-1664, 1666, 1668, 1670-1672, 1674-1675, 1678-1679, 1681, 1683, 1686, 1690-1692, 1697-1699, 1704-1705, 1714-1715, 1721-1724, 1728PM3516B BPD142-167, 169-179,185, 191-193, 203-204, 313PARTS NEEDED
1 - 1316473 RELAYACTION REQUIRED
See the attached Rework Procedure.SERVICE CLAIM ALLOWANCES
Product smu/age whichever comes first Caterpillar Dealer Suggested Customer Suggested
Parts Labor Hrs Parts Labor Hrs Parts Labor Hrs
0-36 mos 100% 3* 0 0 0 0
This is a 3.0?hr job. * Includes 1 hour for inspection and2 hours for replacing/repairing the relay.PARTS DISPOSITION
Return the used part to:Caterpillar Inc.Attention Miro Halicek (PS40621)325 Green Valley RoadGriffin, GA 30224.Any questions call Miro Halicek at (770) 233-5877.Attach. (1-Rework Procedure)Rework Procedure
Prevent the engine from starting and lock outthe equipment before working on or inside the equipment.
Only a qualified electrical service personnelshould service this equipment.
Always use a properly rated voltage-sensingdevice to confirm power is off.
Note: The switchgear will operate withoutthis relay only if the power module is utilized in the standby mode application.
Turn off all supply power.
Locate the type 81 over/under frequency relay(p/n 1316473).
Note: The relay is either in the door of theswitchgear or it is installed in the utility conversion box.
Grasp the handles on the front relay panel andpull out the printed circuit assembly to see the ABB serial number on thebottom side of the printed circuit board.
Verify that the serial number is 9151-9155, 9157-9164,9166-9171, 9173, 9174, 9176-91