Product Support Program For Replacing Cracked Fuel Lines On Certain 3406B And 3406C Truck Engines Caterpillar

NOTE: 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.

NOTE: This Program can be administered only after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS5376" as the Part Number and "7755" as the Group Number. Use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.

Termination Date

Problem

The under valve cover fuel line on certain 3406B and 3406C Truck Engines may crack and will need to be replaced.

Affected Product
Model & Identification Number

3406B (5KJ8332-8380)

3406C (3ZJ61802-61810 8PN11507-11854 )

Parts Needed

3 - 4B2047 Nut

6 - 7C3427 Fuel Line Assembly

3 - 7M9831 Screw

1 - 4P9661 Line Assembly

1 - 4P9662 Line Assembly

2 - 5P4939 Screw

6 - 6V7699 Washer

1 - 1W9167 Clamp Assembly

7 - 1W9168 Clamp

2 - 1W9169 Clamp

1 - 1293948 Gasket

Action Required

1. If an under valve cover fuel line breaks (cracks) or a number 2 external fuel line breaks (cracks), replace all six under valve cover lines (7C3427) with new parts of the same part number.

2. Drain Coolant.

3. Remove Air Compressor.

4. Replace the number 1 and 2 external fuel lines with a new fuel line assembly.

5. Tighten the fuel line nut to a torque of 40± 7 N·m (30 ± 5 lb ft).

6. Install compressor.

7. Refill coolant system.

8. Change oil and install a new oil filter.

Service Claim Allowances

Parts Disposition

Return all replaced fuel lines and associated parts to: