How did they manufacture that without any method of driving that keeper in place? I see a few pipe wrench bites in that gland housing, nothing that I would expect to see to rotate that.
I would like to see how you prepare the bore of the cylinder.
I repaired the two on my skid steer 30 years ago. I made an extension shaft from some 5/8" round bar, that I drilled a hole into the end, with cross holes for set screws that could clamp the end of a cylinder hone (for engine cylinders). And used an electric drill to drive that long shaft. I had a 5 gallon pail of cutting oil with a pump to flush the cylinder as I honed. Worked real well. Don't know if this would be the way it's done, so would be interesting to see how you do it.