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Subject Topic: cassette toilet seal replaced Post Reply Post New Topic
07/3/2011 at 8:46pm
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Here is a quick and easy repair that anyone should be able to do.

My Thetford is a C2 but there must be loads of the other models using the same system. The seal looked ok from above, but the tell tale signs for replacement are the bowl emptying if you leave some flush fluid in it, and when the tank is full carrying it upright to the CDP fluid leaks out (yuk!)

Seal is easy to get hold of from your accessory shop of I got mine from the internet as I live in a remote part of Wales so postage is cheaper than a trip to the nearest dealer which is 25 minutes away. There are quite a few models so check you have the right seal.

Slide off the top cover.


Remove the the 8 screws with a Philips No2 screwdriver (not pozidrive) remember which side the yellow marker is on.


Lift off the cover plate and withdraw the seal.


Place the new seal in the recess, making sure the two cut-outs are in line with the two screw holes at the sides


Replace the top cover plate the same way around as you took it off.



Slide in the removable cover so the yellow markers line up.


Job done, now wash your hands


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07/3/2011 at 9:03pm
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Nice one il show it to the wife..

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Animals have feelings..

JEFF................


08/3/2011 at 12:32am
 Location: Cheshire
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Hi floggett, That reminds me i have to do ours, i changed the small vent seal about a month ago, cost a fiver from the local caravan shop but they want £17. for the lip seal sounds a bit expensive to me, so I think I’ll shop around, very handy post for anyone who doesn’t have the toilet book.



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Steve


08/3/2011 at 11:09am
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Also leave it open during the winter or if the van is not in use for long periods as not doing so will cause it to stick.

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Animals have feelings..

JEFF................


08/3/2011 at 2:05pm
 Location: Polesworth Warwickshire
 Outfit: Bailey Unicorn III Valencia (LR Disco)
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When carrying the cassette, if you see liquid coming out, don't always assume the worst.  It could quite easily be water left in the bottom of the pan after flushing.  The colour of the liquid is a clue.  If is is blue (or whatever colur your 'chemical' is) the it's time to replace the seal.  Thanks for the diagram.  I'll be able to do it next time I need to replace the seal.  Do you need to put vaseline on the seal?

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David


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08/3/2011 at 2:38pm
 Location: Lancashire
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Also leave it open during the winter or if the van is not in use for long periods as not doing so will cause it to stick.

also the cassette cannot be removed if left open without damage to it.

Do you need to put vaseline on the seal

i use olive oil ,lid and seal,have done for years without a problem.

£17 wow

last one cost us £8. 5 years ago.



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the only silly question is the one you do not ask.


08/3/2011 at 7:34pm
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Quote: Originally posted by Steve & Sue on 08/3/2011
<P style="MARGIN: 0cm 0cm 0pt" class=MsoNormal><SPAN style="FONT-SIZE: 11pt; mso-ansi-language: EN-GB" lang=EN-GB><FONT face="Times New Roman">Hi floggett, That reminds me i have to do ours, i changed the small vent seal about a month ago, cost a fiver from the local caravan shop but they want £17. for the lip seal sounds a bit expensive to me, so I think I’ll shop around, very handy post for anyone who doesn’t have the toilet book. <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN>



shop around found mine online for £9



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08/3/2011 at 7:39pm
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I dont think you need to use vaseline, you can get some lip and seal spray from Thetford which is a silicon lube? (like the window fitter use I think). Well a lot of furniture polishes contain silicon so could try that, it would make a wonderful picture, someone spraying mr sheen down the toilet bowl!

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18/7/2012 at 11:29am
 Location: sunny south east!
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Just found this post on a search as think my lip seal has gone as some leakage when carrying. looks like there are (at least) two versions for the C2 - pre june 2000 and post so do check which version you have

Great post thank you Floggitt  -  forum info at their best this is!



18/7/2012 at 12:28pm
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http://www.thetford-europe.com/en/service.aspx

The above link is a compehensive list and step by step instructions for repairs and spares

Saxo1



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18/7/2012 at 6:10pm
 Location: North Wales
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Regarding lubricating the seal, it's either vaseline or olive oil they tell you NOT to use. Might be worth checking on the instructions (available on line if you haven't got the original). You can buy a lubricant, too, that you spray on. Might be a bit dearer but you don't use a lot.

Nora



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