Description

The Cummins Piston Pin Retainer Clips 3901996 are precision-engineered retaining clips designed to securely hold the wrist pin in place when used with the Cummins piston 3919247 . Each piston requires two retainer clips , one on each side of the wrist pin, to prevent axial movement during engine operation. Manufactured from high-strength spring steel , these Cummins pin retainers are built to withstand extreme engine speeds, high temperatures, and continuous heavy-duty diesel operation. Properly installed piston pin clips are critical to preventing wrist pin contact with cylinder walls, which can cause severe engine damage if ignored. Designed to meet or exceed OEM Cummins specifications , retainer clips 3901996 ensure correct piston assembly, long service life, and reliable performance during Cummins diesel engine rebuilds, in-frame overhauls, and complete piston replacements . These clips are commonly replaced whenever pistons or wrist pins are serviced.