Usage:
Start By:
a. Install the steering frame lock pin. Refer to Disassembly and Assembly, "Steering Frame Lock Pin - Remove and Install" for the machine that is being serviced.
b. Release the pressure from the hydraulic system. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release" for the machine that is being serviced.
| NOTICE |
|---|
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide", for tools and supplies suitable to collect and contain fluids in Caterpillar machines. Dispose of fluids according to local regulations and mandates. |
NOTE: Put identification marks on all lines, on all hoses, on all wires and on all tubes for installation purposes. Plug all lines, all hoses and all tubes. This will help prevent fluid loss and this will help to prevent contaminants from entering the system.
1. Disconnect the six hose assemblies from towing brake release sequence valve assembly (1).
2. Remove the two bolts and the washers that hold valve assembly (1) to the rear frame. Remove the valve assembly.
Installation Procedure
NOTE: Check the condition of all O-ring seals and of all parts. If any components are worn or damaged, use new parts for replacement.
1. Put towing brake release sequence valve assembly (1) in position, as shown. Install the bolts and the washers that hold the valve assembly to the rear frame.
2. Connect the six hose assemblies to sequence valve assembly (1).
3. Fill the hydraulic tank with oil to the correct level. Refer to Operation and Maintenance Manual for the machine that is being serviced.
4. Purge the air from the parking brake. Refer to Systems Operation, Testing and Adjusting, Braking System, "Brake System Air - Purge" for the machine that is being serviced.
5. Purge the air from the towing brake release system. Refer to Systems Operation, Testing and Adjusting, Braking System, "Towing Brake Release System Air - Purge" for the machine that is being serviced.
End By:
a. Remove the steering frame lock pin. Refer to Disassembly and Assembly, "Steering Frame Lock Pin - Remove and Install" for the machine that is being serviced.