EXTRACTOR 1951179 - Caterpillar

Table 1
Description     New Part Number     Old Part Number    
Valve     236-5605     153-7023    
Valve Seat     280-3979     224-3983    
Cylinder Head Gp.     396-8375     359-0936
20R-0503
10R-9942    
Cylinder Head As.     396-8374     357-7398    Note: All valves and seats are paired together to give the best wear performance for the material type. Changing the combination can increase the valve/seat wear rates. For this reason, if any valve needs to be changed, all of the valves and seats will need to be changed on the engine. Engines cannot have a split setup of different kinds of intake valves and seats.The new valves and inserts are adaptable back to the first production of the listed engines.The new 236-5605 Inlet Valve and the new 280-3979 Valve Seat Insert are included in the new cylinder head group. The change to the new 396-8375 Cylinder Head Gp is effective at the factory with the engine serial numbers that are listed in Table 2.
Illustration 1 g03234437
(1) The 396-8374 Cylinder Head As is part of the 396-8375 Cylinder Head Gp.The cylinder head coding is stamped on the outside surface of the cylinder head. The coding identifies the head that contains the newly designed inlet valves and seats. Refer to Illustration 1
Table 2
Effective Serial Numbers    
S/N:EED01370-UP    
S/N:EXD00146-UP    
S/N:JWS00214-UP    
S/N:MWH00243-UP    
S/N:T5S00114-UP    
S/N:T5T00002-UP    
S/N:DLS01561-UP    
S/N:EYG00105-UP    
S/N:MJS00332-UP    
S/N:RFM00434-UP    
S/N:T5W00108-UP    
S/N:JRP03341-UP    
S/N:JXP00259-UP    
S/N:RDR00208-UP    
S/N:TNM00422-UP    
S/N:T4Y00132-UP    
S/N:T5A00108-UP    
S/N:BTW00249-UP    
S/N:22168301-UP    
S/N:H9K00305-UP    
S/N:BWX00631-UP    
S/N:88000402-UP    
S/N:H8M00303-UP    
S/N:H4C00608-UP    
S/N:ZMX00417-UP    
S/N:Z4D00183-UP    
S/N:Z9K00544-UP    
S/N:Z4Z00271-UP    
S/N:JNW00275-UP    
S/N:AMA00370-UP    
S/N:GEB01022-UP    
S/N:JEL00283-UP    
S/N:JNS00134-UP    
S/N:MDG00164-UP    
S/N:TPB00212-UP    
S/N:RJG04425-UP