Piston and Ring Set, 3 1/8" M Engine see item GR1723

see item GR1723

The vintage Allis Chalmers logo stands out proudly on the front

501 Series 4 Cyl

Replaces OEM #AA5777R

3000 and 4000 3 cylinder series tractors only when they require a 3" piston (if you have this model of tractor

Piston and Ring Set, 3 1/8" M Engine see item GR1723Piston with single ring, 3 1 8" diameter. This piston would originally have had metal rings, but has since been updated to this single groove piston. Fits the following models: 133, 135, 140, 152, 165, 20C, 20D, 20E, 20F, 230, 230 US Built, 231, 240, 245, 250, 265, 282, 282 US Built, 30E, 40E, 50, 550. Please note that some of these models could have a swapped piston (different from the original factory piston). We recommend removing and measuring