CONTROL & MTG GP-ELECTRONIC 3992618 - Caterpillar

The components that are listed in Table 3 can be used to rebuild the new cylinder heads. The premachined valve seat inserts MUST be used with the precision valve guides.Note: The valve seat counterbores in the former cylinder heads were not machined to the same tolerance as the new cylinder heads. When the former cylinder heads are rebuilt, continue to use the former valve seat inserts.
Table 3
Major Components of the New Basic Cylinder Head Groups    
Basic Cylinder Head Group     Inlet Valves     Exhaust Valves     Valve Guides     Cylinder Head Assembly (1)     Inlet Valve Seat Inserts (2)     Exhaust Valve Seat Inserts (2)    
175-6340     7C-2422     9Y-6232     175-6344     175-6339     160-5769     160-5770    
175-6341     9Y-6232     9Y-6232     175-6344     175-6339     160-5769     160-5770    
175-6336     9Y-6232     9Y-6232     175-6344     175-6334     160-5769     160-5770    
180-5344     180-9044     4P-3079     175-6344     180-5345     171-3992     160-5771    
176-3600     9Y-6232     4P-3079     175-6344     176-3599 (1)     160-5770     160-5771    
( 1 ) The 176-3599 Cylinder Head Assembly is available for parts service. The remaining cylinder head assemblies in this column are not available for parts service. All cylinder heads are serviceable at the "Basic Cylinder Head Group" level.
( 2 ) The valve seat inserts are components of the cylinder head assemblies. The inserts are available individually for parts service.Note: Do not perform any machining or lapping on the valves or seat inserts after installation. Proper seating is established very early in the break-in period.Note: It is VERY IMPORTANT to perform bridge adjustment and valve lash adjustment at the proper interval. The recommended interval for each specific application can be found in the Operation and Maintenance Manual for the engine.