A-PR181-AI Rings, Piston model-686G XR Note: Serial number restrictions apply

Note: Serial number restrictions apply to S67 and S77 models

Fits John Deere TRACTOR: 4640

590SM (Super M Series 1

This Manifold is also available w/o the Gasket Set -- search our Store for Part # G176E601

Includes: One Hundred (x100) Composite Starter Drive Gears

A-PR181-AI Rings, Piston model-686G XR Note: Serial number restrictions applyOne New Aftermarket Replacement Piston Ring Set Fits Ford Tractors with 172 CID Diesel Engine This aftermarket replacement piston ring set (A PR181 AI) is designed Fits Ford tractors equipped with the 172 CID four cylinder diesel engine and 5 ring style pistons at standard 3. 90" bore. Piston rings seal combustion gases, control oil consumption, and transfer heat from the piston to the cylinder wall making them a critical component during any engine