GEAR-SUN 1912611 - Caterpillar

At operating temperature, the hydraulic oil tank is hot and under pressure. Hot oil can cause burns. To prevent possible personal injury, release the pressure in the implement hydraulic circuits (the boom, the stick and the bucket) before any of the hydraulic lines or any of the components are disconnected or removed.
2. Release the pressure in the implement hydraulic circuits (the boom, the stick and the bucket) before any of the hydraulic lines or any of the components are disconnected or removed. Release the pressure as follows:a. Shut off the engine and place key in the "ON" position. Put the hydraulic activation control lever in the "UNLOCK" position.b. Move the control levers for the boom, the stick and the swing to all full stroke positions. This will release any pressure that might be present in the pilot system.c. Return the key to "OFF" position.d. Slowly loosen the fill plug on the hydraulic tank, and release the pressure.e. Tighten the fill plug on the hydraulic tank.f. The pressure in the hydraulic system has been released, the lines and the components can be removed.3. Oil will drain from the hose assemblies that are connected to the shock reducing valve. Place a drain pan under the shock reducing valve to contain the drain oil. 4. Put identification marks on six hose assemblies (1) that are connected to shock reducing valve (3). Disconnect the six hose assemblies from the shock reducing valve. Put plugs in the ends of the hose assemblies to prevent oil loss and to keep contaminants out of the hydraulic system.5. Remove four bolts (2) and shock reducing valve (3) from the machine. The following steps are for the installation of the shock reducing valve.6. Check the condition of the O-ring seals used in the ends of six hose assemblies (1). If the O-ring seals are damaged, use new parts for replacement.7. Install the shock reducing valve in the reverse order of the removal. Refer to the topic "Lubricant Viscosities and Refill Capacities" in the "Operation & Maintenance Manual" for the proper filling procedure and the proper levels for the hydraulic oil system.8. Check the oil level in the hydraulic oil tank. Fill the hydraulic oil tank with oil to the correct level.Disassemble & Assemble Shock reducing Valve
Start By:a. remove shock reducing valve1. Make sure the shock reducing valve is thoroughly clean prior to disassembly. 3. Remove plug (6), spring (4), spool (3) and spring (2) from valve body (1).4. Remove O-ring seal (5) from plug (6). 5. Remove elbow (8) from the valve body. Remove O-ring seals (7) from the elbow.6. Remove connector (10) from the valve body.7. Remove O-ring seals (11) from the connector.8. Remove three plugs (9) from the valve body. Remove the O-ring seal from each plug. The following steps are for the assembly of the shock reducing valve.9. Check the condition of all of the parts of the shock reducing valve. If any of the parts are worn or damaged, use new parts for