VALVE GP-CHECK 8J5913 - Caterpillar

G3606 (3XF),
G3608 (4WF),
G3612 (1YG),
G3616 (4CG) EnginesDescription of Change: A new bellows assembly provides more flexibility than the former bellows assembly. This additional flexibility reduces the chances of cracking in applications experiencing greater engine vibration. The additional flexibility also makes alignment of the bellows assembly with the mating elbow much easier during installation. The new bellows assembly uses a built-in liner which helps to extend the life of this part. This liner prevents the exhaust gases from coming in direct contact with the flexible portion of the bellows assembly. Also, a direction-of-flow arrow has been stamped on the flange of the new bellows assembly. To be correctly installed, this arrow must be pointed in the same direction as the flow of exhaust gas. Adaptable To: The new 123-5717 Bellows Assembly is a direct replacement for the former 6I-0340 Bellows Assembly. The former bellow assembly is canceled. If the 6I-2527 Elbow (part of 6I-2667 Exhaust Bypass Group) used on the G3606 and G3608 is reused, it must first be reworked by removing the aligning snout. Newer 6I-2527 Elbows are no longer manufactured with this aligning snout and no rework would be required using these parts. The 4P-7413 and 4P-7414 Elbows (part of 100-7856 Exhaust Bypass Group) used on the G3612 and G3616 Engines will also need to be reworked if they are reused. Refer to the following illustration showing the portion of the elbows to be removed.
Typical elbow showing the aligning snout (shaded portion) which must be removed.