DOWEL 3F0957 - Caterpillar

Product Support Program For Replacing The Fuel Lines And/Or Brackets On Certain 3412 Generator Set, Industrial, And Marine Engines
SMCS - 1252 PS4762
April 30, 1992
(Revised December 1992)
U-66
A-48
AU-44
B-28
E-39
O-55
TM-6 The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4762" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and use " T" as the SIMS Description Code. If administered after failure, use "96" as the Warranty Claim Description Code and use " Z" as the SIMS Description Code.
Although this Program is to be administered as described above on the Affected Product, parts should be removed from parts stock as soon as possible.
This Revised Service Letter replaces the April 30, 1992 Service Letter. Group 4 Affected Product has been added. The Affected Product covered by Group 4 includes the identification numbers in Groups 1, 2, and 3 as well as additional serial numbers.
Any Group 1, 2, or 3 Affected Product previously reworked under this Program needs to be reworked again as Group 4 Affected Product includes the latest changes.
Termination Date
April 30, 1993Problem
In some applications, the fuel lines may fail on certain 3412 Generator Set, Industrial, and Marine Engines.
Affected Product
Model & Identification Number
Group 1
3412 (5AG101-173; 7HG1-87; 60M3255-4497; 38S13772-15290; 81Z6748-11441)
Group 2
3412 (60M4498-4750; 38S15291-15648; 81Z11442-12567)
Group 3
3412 (60M4751-4896; 38S15649-15853; 81Z12568-13134)
Group 4
3412 (5AG101-173; 7HG1-87; 60M3255-5087, 60M5089; 38S13772-16396; 81Z6748-14183)
Parts Needed
Group 1
1 - 7C6589 Clamp1 - 6I0349 Lines Group *1 - 6I0350 Lines Group *2 - 0L2070 Bolt4 - 9N3388 Screw5 - 0S1590 Bolt3 - 8T1296 Washer1 - 9Y3357 Clamp7 - 9X6458 Washer2 - 688438 Spacer*Lines Groups are used only for this portion of the Program. These lines groups contain the new 4P7801 through 4P7812 Fuel Lines. Engines covered by Rework Procedures '2' and '3' already have the new lines groups. After the completion of this Program, lines groups will not be available in the parts system.Additional parts needed for DIT (non-aftercooled) Engines
1 - 6I0348 Bracket Assembly5 - 0L1351 Bolt **2 - 0S1594 Bolt ****Use in place of the 0L2070 and 051590 Bolts.Group 2
2 - 7C6525 Clamp1 - 7C7747 Clamp1 - 6I4813 Clamp Kit *2 - 0L2070 Bolt5 - 9N3388 Screw1 - 4P7137 Bracket1 - 4P7144 Bracket3 - 0S1590 Bolt3 - 8T1296 Washer2 - 1W9167 Clamp Assembly1 - 1W9168 Clamp1 - 1W9169 Clamp5 - 9X6458 Washer2 - 688438 Spacer*Includes: 1 -