PULLEY AS-CRANKSHAFT 8N6567 - Caterpillar

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 "PS8860" 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.
Termination Date
February 28, 1998Problem
VIMS software can be updated to version 9.3X. When the new 9.3X software is installed on 784B, 785B, 789B, 793B and 793C Trucks the existing pressure sensor used to monitor the system air pressure will need to be changed. The existing sensor (100-4311) will not work with the new software. The new air pressure sensor has a tighter tolerance band and thus new scaling in the software. Also, the new air pressure sensor is not usable with the old version 7.X software.
Affected Product
Model & Identification Number
784B (5RK16-25)
785B (6HK103, 6HK370-377, 6HK385-387, 6HK414, 6HK433-434, 6HK437-444, 6HK447, 6HK450-451, 6HK454-457, 6HK465, 6HK476-510, 6HK514-515, 6HK519, 6HK522-530, 6HK534-541, 6HK543-546, 6HK548-686 )
789B (7EK205-209, 7EK278-281, 7EK284, 7EK286, 7EK288, 7EK292, 7EK296, 7EK299-301, 7EK303-308, 7EK311-315, 7EK318-324, 7EK332-334, 7EK336, 7EK338, 7EK344, 7EK356-357, 7EK359-391, 7EK393-415, 7EK420-427, 7EK432-441, 7EK447-461, 7EK467-552 )
793B (1HL38-39, 1HL43-46, 1HL59-65, 1HL74-82, 1HL132-133, 1HL138-140, 1HL146-148, 1HL154-155, 1HL159-166, 1HL195-197, 1HL216-221, 1HL231-236, 1HL239-254, 1HL257-262, 1HL266-277, 1HL283-300, 1HL307-313, 1HL321-339, 1HL341-347, 1HL349, 1HL357-360, 1HL365-371, 1HL375-380, 1HL384-394, 1HL398, 1HL406-524)
793C (4AR76-121)
Parts Needed
1 - 1415746 Sensor Group1 - 1409474 Software Group (Source)1 - _______ Software Group (Configuration) Software Group (Configuration) should be selected below based upon each machines current capabilities. The selection is based upon wiring vintage and attachment options which have been installed. Only one configuration per machine in needed.
See attached instructions.
Action Required
1. Install the new 1415746 Sensor Group in the air system.2. Upload 1409474 Source Code.3. Upload configuration code as chosen from 9.3X Chart.
Location Of Sensor Requirements and Recommendations
...Data Collection and Merging - all 9.3X data MUST BE downloaded, merged and analyzed using VIMS-PC version V2.1.All prognostic files MUST begin anew; data collected with 7.X software MUST NOT BE COMBINED with data collected with 9.3X software.
...Service Manual - new VIMS service manual SENR6059-03 is now available.It is recommended that this manual be available for use when using 9.3X software.
Service Claim Allowances
This is a 1-hour job.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.(1-Configuration Chart Instructions)Rework Procedure
Configuration Chart Instructions