ENGINE AR-COMPLETE 3878583 - Caterpillar

--------------- END SUPPLEMENT ---------------Description of Change: The turbocharger exhaust coupling on 3500 Engines in the above machines is being installed with a Vee Band Clamp. This clamp will help to ensure that the exhaust coupling keeps a tight fit during engine operation, and should reduce exhaust leaks.Adaptable To: See the chart for adaptability of the 6L-3005 Vee Band Clamp, and the 123-6979 Vee Band Clamp. Couplings and supports are also shown with the models they are used on. A coupling change is necessary to accommodate the new 6L-3005 Vee Band Clamp and 123-6979 Vee Band Clamp. See illustration 1. The 3508 and 3512 engines also require a change to the coupling support. See illustration 2. Shimming of the turbocharger and/or exhaust elbow may be necessary on field rework. Some settling of the manifold and turbocharger support during operation may create the need for realignment also.
Illustration 1. Typical view of turbocharger exhaust coupling (1), and 6L-3005 Vee Band Clamp or 123-6979 Vee Band Clamp (2).
Illustration 2. View of the new 127-8112 (LH) Support (A) and the new 127-8113 (RH) Support (B).