PushnFords
Member
I'm putting together a 520 that I'm rebuilding. The new pistons have 6 grooves...one is below the wrist pin as an oil wiper. The piston set only came with rings for the top 5 grooves. The old pistons had 6 sets of rings including a set in the wiper groove. I looked in the parts catalog and they list AR21882R "Ring, heavy-duty oil control" so I'm wondering if that bottom groove was an optional ring for heavy duty use?
This isn't where I got my piston set (probably should have) but the picture is what I have: http://www.yesterdaystractors.com/store/parts/pics/wm_R1987.jpg
This isn't where I got my piston set (probably should have) but the picture is what I have: http://www.yesterdaystractors.com/store/parts/pics/wm_R1987.jpg