PLATE-IDENTIFICATION 8T4998 - Caterpillar

Engines:
3618 (S/N: 2MW)
New thermocouples are used to measure the engine exhaust temperature. The new thermocouples provide the following improvements:
The new thermocouples have the same overall length but the length of the metal sheath has been reduced while the length of the cable has been increased.
In order to relieve stress on the cable, a spring has been installed on the end of the sheath.
Inside the metal sheath, silicone sealant that resists high temperatures has been applied to the splice between the external cable and the internal thermocouple.The new 226-7782 Thermocouple (90 Degree Bend) is a direct replacement for the former 179-8793 Thermocouple (90 Degree Bend). The new 226-7783 Thermocouple (Straight) is a direct replacement for the former 180-9043 Thermocouple (Straight). The former thermocouples are cancelled. These thermocouples are used in the 162-8442 Exhaust Temperature Sensor Gp. Eighteen 226-7782 Thermocouple (90 Degree Bend) and four 226-7783 Thermocouple (Straight) are used in each exhaust temperature sensor group.Note: The 189-5530 Nut and the 189-5531 Ferrule that were used with the former 179-8793 Thermocouple (90 Degree Bend) are still available for use with the new 226-7782 Thermocouple (90 Degree Bend).Note: The 164-0773 Nut and the 164-0774 Ferrule that were used with the former 180-9043 Thermocouple (Straight) are still available for use with the new 226-7783 Thermocouple (Straight).