PLANETARY GP 7G4853 - Caterpillar

Valves
Start By:a. remove cylinder head assemblies 1. Use tool (A) to put valve springs (1) under compression.2. Remove locks (2) from the valve stem.3. Release the tension on springs (1) with tool (A), and remove tool (A), the rotor coil assembly, the oil shield, springs (1) and washer from the valve stem and guide.4. Remove the valves from the cylinder head. If the valves can be used again, put identification marks on them as to their location for installation purposes. 5. Check the valve spring force with tool (B). See Specifications for the correct spring force values.6. Do Steps 1 through 5 again for the remainder of the valves.Install Valves
1. Put clean engine oil on the valve stem, and install valve (4) in the cylinder head.2. Put washer (2), the inner spring, outer spring (1), the oil shield and rotor coil assembly (3) over the valve stem and valve guide. 3. Put the valve springs under compression with tool (A), and install locks (5).
The locks can be thrown from the valve when the spring compressor is released if they are not in their correct position on the valve stem. To prevent possible personal injury, be sure to stay away from in front of the valve retainer and springs.
4. Remove tool (A) and hit the top of the valve with a plastic hammer to be sure the locks are in their correct position on the valve stem.5. Do Steps 1 through 4 again for the remainder of valves.End By:a. install cylinder head assemblies