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Vic,
Here are a few pics of the "form factor" I was asking about. For some reason the second pic is upside down (looking in the cowl inlet) Thanks Gary [IMG] [/IMG]![]() |
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What is not clear is why Vans chose this version, when they have always sold wide deck engines, and the P-860-5 has the correct gear ratio for that engine. Also, MT's application document recommends a P-860-19 for the RV-10 with an MT 12B prop. Don't know anything about that version of the governor. My P-860-5 is going back to MT today to have the SB31 done on it. |
I confirmed this week that the P-860-3 is the correct governor.
Vic |
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Does any one know the difference between a P860-4 and P860-3. I just looked up my paperwork and it indicates I have a P860-4
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Juergen from MT USA told me today that all P-860 are the exact same except for the clocking. He said he doesn't understand why MT does it that way, because it is very confusing.
This came up, because I asked him why the MT applicability chart shows the P-860-19 as the appropriate PG for the IO-540-D4A5, but MT sold me the -3. Also, the SB has now been pushed back to Monday next week. Please don't shoot the messenger here. I am only parroting what I was told an hour ago by MT. I am not a PG expert and barely have an idea of how the dang things work. |
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Service interval?
I'm just discovering this thread, kinda late, but I think I read through all the details.
I checked my paperwork, and my MT P-860-4 governor was manufactured in 2008 (thankfully outside the affected time period), and has been in service since September 2009 -- so, 7 years. It has 400 hrs on it. From this thread, I just learned that there is a 72-month service interval in addition to the 2000 hr service interval. That surprised me. Can someone speculate or explain why there would be a 6-year service limit on a prop governor? I would think that calendar age would have no bearing at all on the service life, except perhaps for age-hardening of elastomeric seals. If this service interval should be respected, I am a year overdue, and from what I have learned in this thread, it costs $800. It would seem a sensible choice to consider just buying a PCU-5000X instead. Another alternative would be to ignore the calendar-based service interval and just operating the MT P-860-4. I would love to hear supporting arguments for why a 6-yr service interval should be respected on a prop governor. Thanks |
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I am in exact same boat as you are with the age/model of the governor and only slightly more hours, at 560 now. I have asked MT via e-mail this question and for a quote but if there is convincing evidence for this overhaul at 6 year interval, I will certainly go with Harzel governor which does not have this calendar base overhaul requirement. With only $400 or so more, I will put a brand new instead of an overhauled one. |
Based on some of the information posted by those who have spoken to MT directly there is a specific date range. Can we assume the new units being shipped by Vans today are OK.
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