Piston Ring Set RE66820 for John Deere Engines STD 6410 6420 2950

Restore your engine performance with this piston ring set designed as the standard replacement for legacy part number RE66820. This kit is now serviced under part number RE507852 and serves as a direct fit for John Deere diesel engines featuring a 106.5mm bore. Whether you are performing a routine rebuild on a classic 4.239 or 6.359 engine or maintaining a modern PowerTech unit this set provides the necessary compression and oil control to keep your machinery running at peak efficiency. Each ring is manufactured to exact tolerances to ensure a tight seal within the cylinder liner reducing internal wear and preventing power loss. Please verify your specific engine serial number and current piston markings to confirm this standard size ring set matches your rebuild requirements.

• Piston Ring Set: Standard / STD piston ring set for select John Deere diesel engines; replaces OEM part numbers RE66820 and RE507852.
• Engine Compatibility: Designed for John Deere 4.239 and 6.359 diesel engines with 106.5mm / 4.19 inch bore size.
• Ring Size Details: Includes standard piston rings with ring sizes 3.16mm x 2.38mm x 3.5mm. Please verify your ring dimensions before ordering.
• Fits Models: 2040, 2150, 2350, 2550, 2750, 2940, 2950, 3055, 3150, 3255, 4050, 5200, 5300, 5500, 6110, 6120, 6210, 6400, 6410, 6420, 7200, 7210, 7400, 7410, 7510, 7600, and 7610.
• Important Fitment Note: Please confirm your old part number, engine model, bore size, and ring sizes before purchasing, as fitment may vary by serial number and application.