First thing I would suggest no matter what used motor home you might be seriously considering to purchase, is to get the following fluids analyzed:
- Engine Oi
Generator Oil
Engine Coolant
Generator Coolant
Transmission Fluid
You can get kits and watch videos on how to take the samples at
RV Oil Analysis | Leading RV Analysis Company | JG Lubricant Services
I would also check the date of the tires. You will probably have to crawl under the coach to see the back side of the tires. You would be looking for DOT followed by four numbers. The first two is the week the tires were manufactured, and the second two is the year. So 1007 would mean the tires were manufactured the tenth week of 2007.
Specific to the Tiffin coach, there are a few main concerns that you should ask and/or require proof from the owner that they have been inspected and/or taken care of since some or all are known issues from 2007 through 2012:
Roof rails - The roof is a one piece fiberglass with radius edges where it meets the vertical side walls. There is a history of those radius edges developing cracks. These cracks will first appear as very fine white lines. The white you would be seeing is the fiberglass below the base and clear coat. The cracks will eventually get wider and spread to the roof itself. The only fix is to have that radius portion cut off and replaced with aluminum rails.
Wet bay floor rotting out - The floor under the fresh, black and gray tanks is prone to rot out. The way check it is to crawl under the coach past the wet bay pan and poke a screwdriver in the floor. If it is soft, then it is bad. The fix is to completely remove the floor and replace it with a composite material that won't rot.
Front driver's side slide floor rotting - There can be a leak develop at the lower front corner of the driver's slide that allows moisture to get to the slide floor that eventually can lead to the floor rotting out. The way to check it is to open the slide and poke a screwdriver in the front corner of the slide floor. Again if it is soft, then moisture intrusion has started. The fix is to completely remove the slide and remove and replace the floor.
A vertical stress crack in the side wall at the drivers side bedroom slide. It would be on the lower front corner.
Tiffin has been covering the costs of these repairs for a number of years, but the coach you're going to look at might be past that coverage period. If the owner cannot provide you with proof that any or all them have been taken care of, get the serial number of the coach and call Don Boyd at Tiffin (256) 356-0261 Ext 3290
If any of the above conditions have not been repaired, Don will be able to tell you if Tiffin would still pick up the cost. He could also tell you of a Tiffin authorized repair facility that could take care of at least the first two. Depending on where you live the slide floor replacement would most likely have to be done at Red Bay. I have heard there is a facility in CT and in northern CA that can do it, but that would be something to discuss with Don.
The coach probably has electric leveling jacks. I would have the owner run them through an up and auto down cycle at least three or four times. Again, electric jack failure is another known issue. It got so bad that Tiffin stopped using them and now only installs hydraulic jacks.
My Phaeton is a 2009 and I have had all the of the above repaired or replaced, except the driver's side slide floor (no evidence of a problem).