WRENCH AS- 9U5131 - 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.
TERMINATION DATE
30Sep2012
PROBLEM
338-9219, 343-8751, and 355-1242 Harness Assemblies in Dealer parts stock need to be inspected. Some of the Harness Assemblies may be an earlier revision level that incorrectly connects the CAN D to the COM2 port on the radio when installed on various D6T, D7E, D8T, D9T, and D11T Track-Type Tractors. When this connection occurs, the signal is processed as a fault by the GPS radio resulting in the radio resetting about every 15 seconds, the "Required Device Missing" warning to flash on the display, and the GPS radio shown as "Not Connected" in the Diagnostic dialog.
ACTION REQUIRED
Inspect all 338-9219, 343-8751, and 355-1242 Harness Assemblies in Dealer parts stock. Inspect the 338-9219 Harness Assembly in 375-1064 and 375-2698 Accugrade Retrofit Kits and the 343-8751 Harness Assembly in 388-2548 Accugrade Retrofit Kits in Dealer parts stock. Rework any 338-9219 revision 03, 343-8751 revision 02, or 355-1242 revision 01 Harness Assemblies. See the attached Rework Procedure.
SERVICE CLAIM ALLOWANCES
Submit one claim for all parts reworked in Dealer parts stock.Two 9X-3402 Socket Connectors and 0.5 hours labor are allowed for each harness that is reworked.
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Rework Procedure
1) Verify the Harness Assembly part number and revision level before proceeding. Refer to Image 1.1.1 for the typical location of the part number and revision level identification tag.
Image1.1.1
2) On connector AK-C5 "TERM RES D1", remove the 134-2540 Resistor Receptacle Assembly. This will be reused later. Remove the 155-2266 Wedge and 155-2267 Plug. These will be reused later. Leave the 8T-8737 Seal in pin 3. Using electrical tape, wrap the ends of the 856 YL and 857 GN wires and tape the wires back to the harness. See Image 1.2.1 and 1.2.2.
Image1.2.1
Image1.2.2
3) On connector AK-C1, "FUEL TANK HARNESS", cut the 856-YL (pin 8) and 857-GN (pin 9) wires near the start of the harness braiding. Crimp on (2) 9X-3402 Sockets. See Image 1.3.1. Using the 155-2267 Plug Assembly, put the 856 wire into pin A and 857 into pin B and replace the wedge. Connect the 134-2540 Receptacle to the plug and secure it back to the main harness with the 7K-1811 Strap. See Image 1.3.2.
Image1.3.1
Image1.3.2