Glossary “rocker arm” Definition:
1). A pivoting part in a mechanical fuel pump, one end of which rides on a camshaft eccentric or pushrod, and the other end of which pulls on the diaphragm via a mechanical linkage, causing the diaphragm spring to be compressed. 2). A pivoting lever in the valve train of an overhead valve system which applies motion, directly or indirectly from the camshaft to open an intake or exhaust valve.