ACTUATOR AS-VALVE 3134622 - Caterpillar

(8RB),
3608 (6MC, 8LL, 7WR),
3612 (9RC, 9FR),
3616 (1PD, 1FN) EnginesDescription of Change: The new thermowells have an improved steady state and transient response time. The thermowells can be used in engines that operate with distillate fuel and in engines that operate with heavy fuel oil.
Adaptable To: The new 149-1976 Thermowell is a direct replacement for the 4P-0419 Adapter in the engines with the standard exhaust manifolds that are listed in Chart A. The part numbers for the exhaust manifolds have not changed. The 149-1976 Thermowell is also a direct replacement for the 137-5084 Thermowell which was used on some engines.
The new 150-7137 Thermowell is a direct replacement for the 134-6692 Thermowell in the engines with the sensor groups that are listed in Chart B. The sensor groups that are listed in Chart B have Marine Society approval. The part numbers for the sensor groups have not changed. The 150-7137 includes one 164-0773 Nut and one 164-0774 Ferrule that are used to attach the thermocouple to the thermowell. The nut and the ferrule are serviceable parts.