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Old 08-27-2015, 06:39 PM   #11
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I emailed Jayco yesterday and told them I am considering ordering a new Greyhawk and asked about the vibration issue as well as the tank less hot water issue and what they were doing to address these problems.
Also asked to be informed of any other engineering design changes.

The Forest River owners forum sounds like they have the same issue with the vibration over there.
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Old 08-28-2015, 06:36 AM   #12
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I posted all about this is issue in a earlier thread. I ended up with a 2015 Greyhawk because I didn't what to deal with it and DW liked the color scheme better.

For the record the chassis was also a 2016. With the 6 speed.
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Old 08-28-2015, 03:27 PM   #13
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As far as I am concerned I don't think it takes this long to find the vibration problem.

I know for a fact it has been well over a month this problem has been known about, I think it is more of a question maybe between Jayco and Ford over who is going to pay for what on what has been built already.

If say just 20 motor homes have been sold with the problem thats 20 motor homes that might need a very expensive fix, or to be bought back.
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Old 08-28-2015, 04:19 PM   #14
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It will be interesting to see what comes of the vibration issue. Although I don't have a lot of knowledge in the MH side of a cutaway, I do know the E-series cutaways better than most. These chassis are used to build the busses I work on. Ive noticed a vibration in some of our vehicles, but will say its only the extended wheel base vehicles. A lot goes into extending the wheel base, including cutting a perfectly good frame, lots of welding, balancing the additional lengths of drive shaft, and fine tuning driveline angle (which im sure the last two is where the vibration is from). Ford does authorize those modifications to shops that meet their QVM requirements.
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Old 08-28-2015, 05:48 PM   #15
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Quote:
Originally Posted by vagabond 1 View Post
I talked to Jayco yesterday and was told that the 2016 Greyhawk will have a new tankless hot water system and not a hot water tank.
Are they going to a different tank less heater from the Girard or didn't they specify?
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Old 08-28-2015, 07:35 PM   #16
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It was in the 2016 Greyhawk specs in the Jayco Home papge so I asked and all i was told was the new tankless water heater was from a different company.

But from what i know the vibration is only in the 2016's the older Jaycos of the same length do not have the vibration problem, so why did it start this year?
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Old 08-30-2015, 10:07 AM   #17
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When I researched tank-less water heaters for the house, I found out why they are so expensive, and why the don't work well on a RV.


There is a computer that monitors 3 parameters: the input water temperature, the input water pressure, and the rate/volume of the water flow. The systems on the RV's don't do this, and thus the problems. A sudden change in any or all of those parameters can result in getting scalded.


Home systems run on 120v only, at high amperage, and are far more sophisticated. The tech who explained it all to me said that the systems available for RV's just aren't quite ready for that application as yet.
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Old 08-30-2015, 12:18 PM   #18
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What you say Mr. Logan is correct. I did a little checking into a home unit about 4 or 5 years ago and yes there were quiet a few items that had to be perfect for it to work correctly.
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Old 08-30-2015, 01:55 PM   #19
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Not all home systems run on 120v. Ours was a Noritz CNG unit, but the ignition was 120v. The electric ones drew too much power. We went with CNG as they use minimal gas, plus being able to use it in hurricanes with only the small 120v draw for ignition. I have no experience with the Truma tankless water heaters, but I think they're one worth watching, and appear to be far superior to Girard, Atwood, or any of the other ones that are problematic. I know Fleetwood starting using the Truma units. Hadn't seen too many bad reviews on them yet.
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Old 08-30-2015, 05:42 PM   #20
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Just happened to be looking at CW catalog and Suburban has an on demand heater that "monitors" inlet water temp, flow GPM, outgoing water temp and flow GPM. Sounds like that's closer to the residential systems. Curious to see what Jayco uses.
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