TRACK GP 5594920 - Caterpillar

Removal Procedure
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. 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 on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
At operating temperature, the hydraulic oil is hot and under pressure. Hot oils can cause burns.To prevent possible personal injury, release the pressure in the implement hydraulic circuit (boom, stick, bucket, and swing), travel circuits, and the hydraulic oil tank at the filler cap before any hydraulic lines or components are disconnected or removed.Remove the filler cap only when the engine is stopped and the filler cap is cool enough to touch.
Note: The pilot relief valve is in the pilot manifold valve which is located on the right rear of the machine.
Release hydraulic system pressure.Reference: Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release" in this manual.
Open the right rear access door. Lock the access door in the OPEN position.
Illustration 1 g00659722
(a) Pilot manifold valve
Remove pilot relief valve (1) from the pilot manifold.
Illustration 2 g00615291
Remove O-ring seal (5) from cartridge (4) .
Remove spring (6). Remove spool (7). Remove poppet (10) .Note: Count the number of turns while you remove the socket setscrew.
Loosen nut (3). Remove socket setscrew (2) .
Remove plug (8). Remove O-ring seal (9) .Installation Procedure
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. 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 on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Make sure that all of the components of the pilot relief valve are free of dirt and debris prior to installation. Put clean hydraulic oil on the components prior to installation.
Replace all O-ring seals that were removed with new O-ring seals.
Illustration 3 g00615291
Install new O-ring seal (9). Install plug (8) in cartridge (4) .
Install socket setscrew (2) to the original position. Tighten nut (3) to a torque of 16 1.6 N m (12 1.2 lb ft).
Install new O-ring seal (5) .
Install poppet (10). Install spool (7). Install spring (6) .
Illustration 4 g00659722
(a) Pilot manifold valve
Install pilot relief valve (1) in the pilot manifold. Tighten cartridge (4) to a torque of 78 8 N m (57.5 5.9 lb ft).
Close the right rear access door.
Check the hydraulic system oil level.Reference: Refer to Operation and Maintenance Manual, "Lubricant Viscosities and Refill Capacities" for the proper filling procedure and the proper level for the hydraulic oil system.
Adjust the pilot relief valve pressure. Refer to Testing and Adjusting for the correct adjustment procedure.