Never done it myself but the R pullers do it all the time to obtain 830 power from an R. They update the pumps to 13mm too. The info is in the two cylinder service manual. iirc the R uses the same 10mm pumps as the 70,80 and early 820.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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