I put injectors in my 720 in '05, they have higher cracking pressure and a tad more advance. Don't remember what the hole diameter or the spray angle. Would have to contact the guy who built them.
Later I got a set of 13.5mm pumps from the same place. Together they put more than enough for a 720, I have the rack closed way down. They would be more suited for an 820.
Please email me at gpuller at hot mail dot com, we can talk more about the pumps. Plus I'd like to ask you some questions about the 830 valves in a 720/30 head.
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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