STUD-TAPERLOCK 6L8562 - Caterpillar

Engine:
3508 (S/N: CAW1-UP; 68Z1-UP; 69Z1-UP; 70Z1-UP)
3508B (S/N: S2A1-UP; CBB1-UP; S2D1-UP; S2F1-UP; 2HW1-UP; BGX1-UP)
3512 (S/N: PTG1-UP; FDR1-UP; 65Z1-UP; 66Z1-UP; 67Z1-UP)
3512B (S/N: BLF1-UP; S2G1-UP; S2K1-UP; PTM1-UP; S2N1-UP; 1PW1-UP; 4AW1-UP)
3516 (S/N: RKT1-UP; GZX1-UP; 71Z1-UP; 72Z1-UP; 73Z1-UP)
3516B (S/N: BMB1-UP; LEK1-UP; CBN1-UP; S2P1-UP; GZT1-UP; S2T1-UP; S2W1-UP; 1NW1-UP; 2FW1-UP; GZY1-UP; S2Z1-UP)
Engine News SEBD9557, 9 August 2008, "New Cylinder Head Groups Are Used". Disregard the article. The article below is updated with new part numbers.Description of Change: New cylinder head groups and assemblies are used for all engines that are listed above. The new head groups and assemblies include nitrocarburization of the valve seat inserts on the intake and exhaust valves. The nitrocarburization coating reduces the recession of the valves. Note: No machining is allowed on the installed valve seat inserts or the coating will be removed.Adaptable To: The new basic cylinder head groups and assemblies are now used for top end overhauls and for major overhauls on the engines that are listed above. The new basic cylinder groups and assemblies may be used individually in replacement of the former basic cylinder head groups and assemblies. The former cylinder head groups and the new cylinder head groups are listed in Table 1 and in Table 2. The part numbers of the former valve seat inserts and the new valve seat inserts are listed in Table 3. Table 4 lists the serial number effectivity of the new cylinder head groups.
Table 1
3500B and 3500C Engines        
Former Cylinder Head Group     New Cylinder Head Group     New Basic Cylinder Head     Service Replacement Cylinder Head with Guides     Reman Cylinder Head    
101-0830     299-3521     335-6220     299-3519     20R-0695
10R-8618 (1)    
( 1 ) Upgrade To New (UTN)Note: SIS Web may show the 10R-7765 Cylinder Head Gp instead of the 20R-0695 Cylinder Head Gp for the serial numbers prior to the effective serial numbers listed below. Use the 20R-0695 Cylinder Head Gp for the prior serial numbers of the effective serial numbers listed below.
Table 2
3500 Engines    
Former Cylinder Head Group     New Cylinder Head Group     New Basic Cylinder Head     Service Replacement Cylinder Head with Guides     Reman Cylinder Head    
4W-0095     299-3520     335-6217     299-3518     10R-8619 (1)    
( 1 ) Upgrade To New (UTN)
Table 3
Part Numbers for Valve Seat Inserts    
Valve Seat Inserts     Former Cylinder Head     New Cylinder Head    
Intake     130-2607     183-8809    
Exhaust     130-2608     289-9745    
Table 4
Effective Serial Numbers    
S/N:1NW00162-UP    
S/N:1PW00456-UP    
S/N:2FW00424-UP    
S/N:65Z01287-UP    
S/N:69Z00914-UP    
S/N:67Z02191-UP    
S/N:68Z01311-UP    
S/N:70Z01082-UP    
S/N:71Z00427-UP    
S/N:72Z00578-UP    
S/N:S2A00136-UP    
S/N:73Z00980-UP    
S/N:BGX00129-UP    
S/N:S2D00185-UP    
S/N:2HW00384-UP    
S/N:CBB00538-UP    
S/N:S2G00117-UP    
S/N:BLF00191-UP    
S/N:CBN00468-UP    
S/N:S2K00260-UP    
S/N:BMB00132-UP    
S/N:CAW00456-UP    
S/N:S2N00122-UP    
S/N:4AW01746-UP    
S/N:FDR00334-UP    
S/N:S2P00182-UP    
S/N:GZT00147-UP    
S/N:GZX00117-UP    
S/N:S2W00112-UP    
S/N:GZY00120-UP    
S/N:LEK00131-UP    
S/N:PTG00347-UP    
S/N:PTM00636-UP    
S/N:RKT00129-UP    
S/N:S2F00124-UP    
S/N:S2T00107-UP    
S/N:S2Z00131-UP