Product Support Program For Replacing Cracked Fuel Lines On Certain 3406C Engines Used In Certain Machine, Commercial, Industrial And Marine Applications Caterpillar

Product Support Program For Replacing Cracked Fuel Lines On Certain 3406C Engines Used In Certain Machine, Commercial, Industrial And Marine Applications

October 26, 1997
U-320
A-286
AU-256
S-154
H-82
O-273
TM-17

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 only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS5377" 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 lines on certain 3406C Machine, Industrial, Commercial and Marine Engines may crack and will need to be replaced.

Affected Product
Model & Identification Number

3406C (1LS370-394 1SS204 6TB16816-17074 2WB17603-17671 3ER1437-1766 4JK0289-310 4TB5736-5827 4ZR2016-2488 8FS556-697 )

16H (6ZJ248-2823JR37)

621F (4SK557, 4SK559, 4SK561-609, 4SK6178PL111-118, 8PL123)

623F (6BK395-412)

627F (1DL345-367, 1DL369, 1DL370)

RM-350 (5FK-132, 5FK133)

RR 250B (3RR106, 3RR107, 3RR111)

SS-250B (5GR109-111)

PM-465 (5ZS120)

5080 (6XK147, 6XK148, 6XK153-158, 8SL94, 8SL95)

375 (8XG2996NK218, 6NK220, 6NK221)

375L (9WL185, 9WL187, 9WL188 1JM304-318, 1JM320-323, 1JM325, 1JM326)

D8R (7XM1464-1466, 7XM1468-1536, 7XM1538-1722, 7XM1724, 7XM17279EM447-450, 9EM452-470, 9EM473, 9EM475)

824G (4SN345-349)

825G (6RN308-311, 6RN313, 6RN315)

826G (7LN257-281)

980G (9CM597, 9CM599-602, 9CM608, 9CM609, 9CM612-668, 9CM670-672, 9CM674, 9CM676-689, 9CM691, 9CM692, 2KR1082, 2KR1089-1110, 2KR1112-1283, 2KR1285, 2KR1286 2SR379-385, 2SR388, 2SR389, 2SR392)

D350E (9LR357-391, 9LR393-408)

D400E (2YR575-579, 2YR595-597, 2YR599-648, 2YR676, 2YR680)

Spare\Replacement Engines

11W15917-15967

Use the appropriate 99Z code when submitting a claim on an 11W prefix used as a spare component.

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

Action Required

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

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

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

Service Claim Allowances

NOTE: This is a 2-hour job.

Parts Disposition

Return all replaced fuel lines and associated parts to: