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 Topic: conway tardis - elevation mechanism
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25/9/2013 at 12:10pm
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The Jayco system is a blessing - and a curse!
It's all internal (no exposed cables or pulleys under the camper) which helps it last a long time with minimal maintenance.
However, when things finally do go wrong, it's one of the more complicated systems to fix.
It relies on large 'bendy' springs (a bit like plumbers pipe springs) to push up the telescopic lifer arms. The guides for these springs are bolted to the camper floor (one in each corner, obviously)
One of the most common causes of failure is the fact that the floor rots, and pressure exerted by the springs tends to tear the guides out of the floor.
The floor gets wet because rain water trickles down the lifter posts and pools at the bottom, on the floor. When new, all Jayco-type lift systems are supplied with a zipped canvas cover for each lifter post, designed to keep the rain out.
These tend not to be used by owners - and usually end up getting lost after a couple of years.
The roof *should* raise very easily - i.e, smoothly, and without any undue effort. I always found the Jayco system one of the easiest to operate - and if raising the roof is at all hard, it suggests that something needs looking at pronto.
Another possibility is that the roof might become waterlogged due to a leaking centre seam - thus increasing the weight. You could tell if this was the case by using a damp meter.
I don't want to sound too gloomy, however - and the lift system is certainly fixable, but you do need some DIY skills.
Here is a link to someone who successfully repaired and strengthened the floor due to the guides pulling away from the floor
Link Here
It's for a Cardinal, but the lift system is exactly the same as the Tardis.
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