PUMP & MTG GP-SCREED VIBRATORY 2407325 - 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 (boom, stick and bucket) before any hydraulic lines or components are disconnected or removed.
1. Release the pressure in the hydraulic system as follows:a. Fully retract the rod in the stick cylinder.b. Adjust the position of the bucket so it will be flat on the ground when the boom is lowered.c. Lower the boom until the bucket is flat on the ground.d. Shut off the engine, and put the hydraulic activation control lever in the "Lock" position.e. Move the control levers for the boom, bucket, stick and swing through their full travel strokes. This will relieve any pressure that may be present in the pilot system.f. Slowly loosen the air breather cap on the hydraulic oil tank to release the pressure.g. Tighten the air breather cap on the hydraulic oil tank.h. The pressure in the hydraulic system has now been released. Lines and components can now be removed. 2. Put identification marks on eight hose assemblies (1) that are connected to the flow control pilot valve for installation purposes. Disconnect the eight hose assemblies from the valve. Put plugs in the ends of the hose assemblies to keep dirt and debris out of the hydraulic system.3. Remove two bolts (2) that hold the flow control pilot valve to the mounting bracket. Remove flow control pilot valve (3). Install the flow control pilot valve in the reverse order of removal.4. Check the oil level in the hydraulic oil tank. Fill the hydraulic oil tank with oil to the correct level. See the Operation & Maintenance Manual for the correct filling procedure.Disassemble & Assemble Flow Control Pilot Valve
Start By:a. remove flow control pilot valve1. Be sure the flow control pilot valve is thoroughly clean prior to disassembly. Put identification marks on all parts of the flow control pilot valve as to their location. 2. Remove three socket head bolts (1) and cover (2) from the valve body. 3. Remove two O-ring seals (4) and two springs (3) from the valve body. 4. Remove two spools (5) from the valve body. Remove washer (6) from each spool. 5. Remove three socket head bolts (7). Separate valve group (8) from valve body (9). 6. Remove spring (10) and O-ring seals (13) and (14) from the valve group.7. Remove O-ring seal (11) and guide (12) from the valve body. 8. Remove fitting (20) from the valve group.9. Remove plugs (15) and (21). Remove spring (16) and spool (17).10. Remove plugs (19) and (22). Remove two balls (18).11. Remove the O-ring seals from plugs (15), (21), (19) and (22). The following steps are for the assembly of the flow control pilot valve.12. Be sure all parts of the flow control pilot valve are thoroughly clean prior to assembly. Also, check the condition of all O-ring seals used in the flow control pilot valve. If any