Product Support Program For Replacing The Jacket Water Radiator Top Tank On Certain 789 Trucks With A Separate Circuit Radiator Top Tank 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 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 "PS4499" as Part Number, "7755" as Group Number, and "96" as Description Code.

Termination Date

Problem

Certain 789 Trucks equipped with a high ambient radiator group are operating above 5000 feet in altitude. This may result in too high an exhaust gas temperature (and contribute to lower exhaust system component lift) when operating in ambient temperatures above 70 degrees F.

Affected Product
Model & Identification Number

789 (9ZC195, 9ZC226, 9ZC233, 9ZC234, 9ZC236-240, 9ZC248, 9ZC255, 9ZC259, 9ZC264-274, 9ZC276-279, 9ZC313-327, 9ZC340, 9ZC341, 9ZC346, 9ZC347, 9ZC354-360, 9ZC363-365, 9ZC369, 9ZC370)

Parts Needed

1 - 9H5829 Gasket

1 - 1M8649 Ring

1 - 8M2888 Gasket

1 - 7N2957 Cover

1 - 7N5565 Cap

1 - 8N1425 Switch

1 - 2P3230 Gasket

1 - 5P8502 Padlock

1 - 1S0286 Stud

1 - 2S2846 Retainer

1 - 2S6097 Tang

4 - 5S4629 Gasket

1 - 9S9979 Ring

2 - 1W3601 Gasket

1 - 7W4243 Tank Assembly

29 - 9Y1654 Seal (Use as Required)

29 - 9Y1655 Seal (Use as required)

Action Required

Replace the existing jacket water radiator top tank with the new parts for a separate circuit radiator top tank. This will reduce exhaust temperatures by lowering aftercooler water temperatures.

Service Claim Allowances

NOTE: This is a 10-hour job.

Parts Disposition

Any parts removed can be rendered useless and scrapped immediately upon completion of the repair.