RING-WEAR 2D0714 - Caterpillar

Engine:
3512 (S/N: 50Y1-UP)
3512B (S/N: S2H1-UP; S2J1-UP; S2L1-UP; S2M1-UP; 7HM1-UP; 8EM1-UP; 4TN1-UP; 2EZ1-UP)
3512C (S/N: TTC1-UP; TTF1-UP; TTG1-UP; MKH1-UP; E3W1-UP; E3Y1-UP)
3516 (S/N: 3XS1-UP)
3516B (S/N: 8CN1-UP; 8KN1-UP; 9AN1-UP; S2R1-UP; S2S1-UP; 4BW1-UP; S2X1-UP; S2Y1-UP)
3516C (S/N: TTD1-UP; PAG1-UP; TTH1-UP; TTJ1-UP; JTS1-UP)
Engine News SEBD9916, 05 December 2013, "A New Exhaust Temperature Sensor Group Is Used on Certain 3500 Marine Engines". Disregard the previous article, serial number effectivity has been changed.Description of Change: The new temperature sensor groups utilize gold plated pins. The gold plating has a higher resistance to wear than the typical nickel plating.Adaptable To: The new 449-3985 Temperature Sensor Gp replaces the existing 243-5752 Temperature Sensor Gp. The new temperature sensor group is adaptable back to first production on the serial numbers listed above.Note: When the new 449-3985 Temperature Sensor Gp is installed, also install new 9X-3402 Connector Sockets in the factory wiring harness connectors.This change is effective for the serial numbers listed in Table 1.
Table 1
Effective Serial Numbers    
S/N:50Y01909-UP    
S/N:2EZ00376-UP    
S/N:4TN00868-UP    
S/N:7HM00271-UP    
S/N:8EM00562-UP    
S/N:MKH00283-UP    
S/N:S2H00643-UP    
S/N:S2J00793-UP    
S/N:S2L00984-UP    
S/N:S2M00203-UP    
S/N:E3W00361-UP    
S/N:E3Y00381-UP    
S/N:TTC00623-UP    
S/N:TTF00577-UP    
S/N:TTG00348-UP    
S/N:3XS00408-UP    
S/N:4BW00591-UP    
S/N:8CN00212-UP    
S/N:8KN00588-UP    
S/N:9AN00412-UP    
S/N:PAG00483-UP    
S/N:S2R00803-UP    
S/N:S2S00495-UP    
S/N:S2X01699-UP    
S/N:S2Y00119-UP    
S/N:JTS00450-UP    
S/N:TTD00418-UP    
S/N:TTH00813-UP    
S/N:TTJ00518-UP