Usage:
3406 And 3408 Truck Engines
Description of Change: New cylinder block groups are used on 3406 and 3408 Truck Engines. These new cylinder blocks have a top deck that is approximately 5 mm (.2 ") thicker. This thicker top deck helps prevent movement of the cylinder liner in the cylinder block. This movement can cause damage (erosion) to the cylinder block in the area below the cylinder liner flange.
Adaptable As: The new 2W6756 Cylinder Block Group is a direct replacement for the former 7N1203 Cylinder Block Group in 3406 Truck Engines. These new cylinder block groups are in effect on 3406 Truck Engines with Serial Numbers 92U63473-Up. The new 2W4640 Cylinder Block Group is a direct replacement for the former 7N853 Cylinder Block Group in 3408 Truck Engines. These new cylinder block groups are in effect on 3408 Truck Engines with Serial Numbers 28V4539-Up.