BRG-MAIN 8N6529 - Caterpillar

ACTION REQUIRED
If the machine is experiencing the described symptoms the 126-1357 Main Steering Control Valve can be replaced with an improved 301-4614 Control Valve.
Since machines can be field converted from standard steering to secondary steering, you need to identify the steering configuration of the main steering control valve. In order to determine which configuration the machine is equipped with, refer to Images 1 and 2. Image 1 is for standard steering, and Image 2 is for secondary steering.
This program only applies to machines with standard steering. If the steering configuration has been modified please contact the local Dealer Technical Communicator (T/C). The Dealer Technical Communicator (T/C) will contact the Caterpillar Hydraulic & Hydraulic Systems (H&HS) Service Engineering Group for additional instructions.
Image1
Image2
SERVICE CLAIM ALLOWANCES
Product smu/age whichever comes first Caterpillar Dealer Suggested Customer Suggested
Parts % Labor Hrs% Parts % Labor Hrs% Parts % Labor Hrs%
0-4000 hrs,
0-24 mo 100.0% 100.0% 0.0% 0.0% 0.0% 0.0%
4001-8000 hrs,
25-48 mo 100.0% 50.0% 0.0% 0.0% 0.0% 50.0%
This is a 6.0-hour job
PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Rework Procedure
1. Park the machine on a flat surface away from operating equipment.
2. Connect the steering frame lock. Refer to Disassembly and Assembly Manual "Steering Frame Lock - Separate and Connect".
3. Release the hydraulic system pressure. Refer to Disassembly and Assembly Manual "Hydraulic System-Pressure Release".
Cleanliness is an important consideration when servicing any hydraulic component or system. Before the disassembly procedure, the exterior of the component(s) should be thoroughly cleaned. This will prevent contamination from entering the system.
Put identification marks on all lines, tubes, hoses, and wiring harness assemblies for installation purposes. Plug all lines, hoses, and tubes. This helps to prevent fluid loss and keeps contaminants from entering the system.
4. Remove the 126-1357 Main Steering Control Valve. Refer to Disassembly and Assembly Manual, SENR5893, for instructions.
If the machine has previously been modified with an external pilot drain line, remove the 241-8678 Hose Assembly and replace the 8T6696 Tee with the original 6V8625 Elbow. (See Image 1.1.1 Modified Configuration and Image 1.2.1 Original Configuration)
Image1.1.1
5. Install 301-4614 Steering Control Valve.
Image1.2.1
6. Check the hydraulic fluid level. Add hydraulic fluid if necessary.
7. Remove the steering frame lock.
8. Perform functional steering test prior to re-commissioning machine.