ROLLER GP-TRACK DOUBLE FLANGE 7K8571 - Caterpillar

3512B (7HM, 8EM, 4TN),
3516 (4MJ),
3516B (8CN, 8KN, 9AN) Marine Engines;
3516 (5SJ) Generator Set Engines;
3516 (9KF) Locomotive EnginesSUPPLEMENT: 02/01/97Engine News, August, 1996, Page 3, "Manifold And Shield Groups Have Changed In Order To Provide For A Side Accessed Thermocouple Port"Under the "Adaptable To:" section in this article, a sentence needs to be added for explanation of the 5SJ serial number effectivity. Some of the part numbers in the "Maniford And Shield Group Adaptability And Effectivity Chart" are incorrect. The added sentence and corrected chart follows:
Adaptable To: The above changes are adaptable to the 3516 (5SJ) Generator Set Engines as an attachment only. --------------- END SUPPLEMENT ---------------Description of Change: Manifold groups, exhaust elbows, shield groups and shield assemblies have been changed. The new changes allow for side access to the thermocouple port in the above engines. The new changes repositions the inlet to the turbo sensor out of the extreme heat from the engine.
Typical view of exhaust shield groups and exhaust manifold groups. New shield group (A). New manifold group (B). Side access to the thermocouple port (C). Adaptable To: The 9Y-4599, 100-3144 and 107-7184 Exhaust Manifold Groups have been changed to provide a side accessed thermocouple port. The new 128-9506 Exhaust Elbow has the port repositioned and has replaced the former 115-7855 Exhaust Elbow. The 107-9520, 107-9521 and 119-5661 Exhaust Shield Groups have been changed to provide for the side access position.
See the illustration.
The 128-9507 Exhaust Shield Assembly has replaced the former 116-1353 Exhaust Shield Assembly.
See the chart for adaptability and effectivity.