New Lever Rocker for Cummins 4003911 3064597 4003903

Lever Rocker for Cummins

This lever rocker acts as a valve train actuator for Cummins engines, referencing OEM part numbers 4003911, 3064597, and 4003903 to ensure correct cylinder intake and exhaust timing.

Overview

This lever rocker is designed to transfer the motion of the camshaft to the engine valves with minimal mechanical friction. Engineered specifically for Cummins heavy-duty diesel engines, this lever rocker maintains precise valve clearance to maximize combustion efficiency. Diesel mechanics and fleet service centers install this lever rocker to repair worn valve train components and prevent cylinder misfires.

Built For Performance

• Forged from high-strength steel alloy to endure heavy valve spring pressures
• Hardened contact pad surfaces reduce wear and extend overall timing component life
• Precision-bored pivot journal ensures smooth rocker arm oscillation
• Direct replacement design matches original OEM dimensions for seamless integration

On-The-Job Use

• Replacing worn or pitted rocker arms during top-end engine overhauls
• Restoring precise valve timing and clearance on industrial diesel engines
• Resolving excessive engine noise and valve train clatter during routine maintenance

Specs At A Glance

Good To Know

Q: Does this lever rocker come with the adjustment screw? A: This lever rocker is sold as the rocker body itself; the original assembly should be checked if the adjustment hardware needs to be reused.

Q: Why do rocker arms typically need to be replaced? A: Wear on the contact pads or pivot journals over millions of cycles can alter valve lift and timing, requiring replacement.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.