TILT CYLINDER GROUP--R.H.,TILT CYLINDER GROUP--L.H. 7K9435 - Caterpillar

ACTION REQUIRED
If the machine is experiencing the described symptoms the 133-8609 Main Steering Control Valve can be replaced with an improved 301-4602 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 secondary 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 133-8609 Main Steering Control Valve. Refer to Disassembly and Assembly Manual, RENR2173 for the 988G and RENR6222 for the 988H, for instructions.
If machine has previously been modified with an external pilot drain line the 191-6248 and 4E3664 Hose Assemblies along with the 7X0872 Swivel Tee and 6V8636 Connector will have to be removed from the hydraulic tank bulkhead. (See Image 1.1.1 Modified Configuration and Image 1.2.1 Original Configuration)
Image1.1.1
5. Install cap on tank bulkhead until you are ready to install the 155-3683 Hose Assembly as part of the normal installation procedure.
6. Install 301-4602 Steering Control Valve.
If machine has been modified with an external pilot drain line, install a new 155-3683 Hose Assembly (See Image 1.2.1) when new steering control valve is installed.
Image1.2.1
7. Check the hydraulic fluid level. Add hydraulic fluid if necessary.
8. Remove the steering frame lock.
9. Perform functional steering test prior to re-commissioning machine.