3165977 Spring Fits Caterpillar Fits CAT Industrial Construction Models model-FG-35-LP 8N (serial number 263844 and

8N (serial number 263844 and up

and 410 wheel/backhoe loader models

BX1850 (with RCK54-23BX Mid-Mower)

Hole size: 1-1/2"

4610 (5/83>)

3165977 Spring Fits Caterpillar Fits CAT Industrial Construction Models model-FG-35-LP 8N (serial number 263844 andOne New Aftermarket Replacement Inner Valve Spring Fits Caterpillar (Fits CAT) 3500 Series Engines This aftermarket replacement inner valve spring Fits Caterpillar (Fits CAT) OEM part number 3165977 and fits the heavy duty 3500 Series diesel engines used in large construction and industrial equipment. The inner valve spring seats inside the cylinder head valve spring assembly, working alongside the outer spring to maintain precise valve timing and