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As a result of a recent thread I realised there were 4 separate warm air feeds from the Truma, I thought I only had 2. After dismantling the fixed bed, I now find that one of the rear two has dropped off which explains why I never have had warm air at the front of the MH. I have pushed it back on temporarily and ,wayhey, I now have heat.
According to Truma, the 65mm spiral ducting is just a push fit into the base of the heater with a slight twist to retain it in the collar. This method is very susceptible to failure due to vibration and I would be very interested in hearing suggestions of how to retain them more firmly especially as they are so inaccessible. Any ideas please?
I have seen Stelyns suggestion in this thread http://www.motorhomefacts.com/ftoptitle-116583-truma-6002-ducting-query.html
but I can only get one hand to the rear two them as they are wedged up against the rear wheel arch so cant remove the collar. I could whack some adhesive on prior to pushing it in but what one?
On our old van the collars had been drilled so that a self tapping screw could be driven through enough to catch the flexible pipe. This seamed to work.
That is what I have done for one of the front connections but there is no room to get a screwdriver in, let alone a drill. Thanks for the suggestion though.
A bit of good old duct tape from the collar to the pipe?
Thanks Cronkle, I think that might work. I have just checked and there is a 5mm step round the collar up from the ducting and I wont have sufficient working access to go round in one strip. However, I can probably apply thin strips lengthwise from collar to duct wherever I can get access, and hold these wth some radial strips. This should be sufficient to hold it in. If not it can easily be removed and redone, unlike glue.
Well that's job for tomorrow unless someone else has any other ideas.
I can't believe that Truma dont have a better means of fixing or make it easier to remove the collars. I can get access to the inside of these but unable to depress the two spring clips.
Well that's job for tomorrow unless someone else has any other ideas.
The only other thing I could think of is to go back along the pipe to where you do have reasonable access, screw a ducting clip or similar to the base and attach it so the pipe is holding the pipe 'towards' the collar if that make sense?
If you have line of sight and a long screwdriver then you can put a small lump of bluetac on the end of the screwdriver and push the screw on to the screwdriver.
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After dismantling the fixed bed, I now find that one of the rear two has dropped off which explains why I never have had warm air at the front of the MH. I have pushed it back on temporarily and ,wayhey, I now have heat. 
