CARRIER-PLANETARY 9W4957 - Caterpillar

Remove Valves
START BY:a. remove cylinder head assembliesb. remove precombustion chambers/direct injection adapters 1. Put springs (1) under compression with tool (A).2. Remove the locks from the valves.3. Remove tool (A), the rotocoil, spring and valve. If the valves can be used again, put identification marks on the valves for location at installation. 4. Check the spring force with tool (B). Spring force must be 344.7 17.3 N (77.5 3.9 lb.) when the length of spring under force is 54.99 mm (2.165 in.).5. Do Steps 1 through 4 again for the remainder of the valves.Install Valves
1. Put clean engine oil on the valve stem. Install spring (2), rotocoil (1) and the valve. 2. Put the springs under compression with tool (A).3. Install locks (3) with the thick end up.
Locks can be thrown from the valve when the spring compressor is released if the locks are not in their correct position.
4. Remove the compressor, and hit the valve with a soft hammer to be sure the locks are in their correct position.5. Do Steps 1 through 4 again for the remainder of the valves.END BY:a. install precombustion chambers/direct injection adaptersb. install cylinder head assemblies