DW10 D6 9U Pony Engine- Need Piston Ring Part Numbers

Compression ring 5B2
Oil ring 4B9997
Set of Rings 4F9876 count is wrong because it includes 2 oil rings per piston instead of 1

Thanks CCJersey.

When did they switch from the cast iron pistons to aluminum? My service books show pistons with a ring at the bottom of the skirt.

Hi Team,
to the best of my knowledge cast iron pistons were only used in Vertical ponies.

Scan chart below gives standard oversized pistons and dimensions for both Horizontal and Vertical ponies.

The semi-finished pistons could then be machined to your required dimensions for the least metal removed bore cleanup--and/or depending upon rings available.

From memory some after market semi-finished pistons will cleanup to larger bore sizes depending upon the supplier.

To make the old style Part Numbers work in the Dealers computer the number format needs to be 6 digits so the 5G3 ring Part No will be 5B0003 for it to work today--if still available.
Also for reference only as an example a L364 lock would become 0L0364 to work today.

Hope this helps.
Cheers,
Eddie B.

Eddie,

Thank you very much for your effort and sheets. This does help as it gives me the typical skirt clearance that they run on these. I'm going to have the cylinders bored and honed to fit my aluminum pistons. Why they are marked .040 and are actually .030 over is unknown to me, but it will work. I'm going to have the crank ground to match my bearings so all should be like new.

Thanks again

Greg