Quite literally - I'm in the sh....... - Motorhome Forums, Motorhome Discussion, Motorhome Chat

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post #1 of 17 (permalink) Old 17-08-2017, 12:16 Thread Starter
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Quite literally - I'm in the sh.......

The other morning when we returned from France the Thetford toilet mechanism failed to work - the circular disc had disappeared into the depths of the cassette and we couldn't 'block' rising odour.

I presumed the disc had dropped off but after donning gloves, rinsing out the cassette and opening it up I've found the black crescent shaped piece (identified by a red cross in picture) has sheared off and is not repairable.

Would your advice be to buy a replacement mechanism as illustrated (about 46 on Ebay) or is it more sensible, but costly, to buy a new cassette for around 104?

The cassette is around four years old and seems reasonably okay but I don't know if there's any kind of 'sell by date' on Thetford cassettes.

Any one else had a similar problem or is it just me having a one off?
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post #2 of 17 (permalink) Old 17-08-2017, 12:36
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The moving parts will suffer wear and year I guess and therefore need replacing depending on frequency of use! The holding tank should last pretty much for the lifetime of the van. I would go for the cheaper option. These toilets are dead easy to work on and should you need a tutorial just look on YouTube. Also, if you get genuine Thetford parts you should get comprehensive fitting instructions in the package.

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post #3 of 17 (permalink) Old 17-08-2017, 12:41
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I'd just fit a new blade valve assembly, as shown in your photo. I've had to do that several times over the years. It's easy to do.

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post #4 of 17 (permalink) Old 17-08-2017, 13:03
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Hello Mate
You realize that the white part snaps over the orange part and holds in place dont you.

Have you tried gorilla glue. Its very good and is activated by water.

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post #5 of 17 (permalink) Old 17-08-2017, 13:08
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I'd suggest to obtain a 'freshup' kit of new cassette and toilet lid, and then to repair if possible.

If the repair works then you have a spare, or if it fails in use, you still have a replacement.

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post #6 of 17 (permalink) Old 17-08-2017, 13:35 Thread Starter
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Thanks for the replies.

I'll order a replacement mechanism and fit that.


I daren't risk it breaking again so I'll replace it.

I had some experience of working with the gubbins of a cassette a few years ago and the work holds no terrors - but if you've got a few minutes and live nearby .........
tugboat and tugboat like this.

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post #7 of 17 (permalink) Old 17-08-2017, 14:13
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Quote:
Originally Posted by KeithChesterfield View Post
Thanks for the replies.

I'll order a replacement mechanism and fit that.


I daren't risk it breaking again so I'll replace it.

I had some experience of working with the gubbins of a cassette a few years ago and the work holds no terrors - but if you've got a few minutes and live nearby .........
We dont know where you live Barm Pot

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post #8 of 17 (permalink) Old 17-08-2017, 14:31
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Quote:
Originally Posted by Sprinta View Post
I'd suggest to obtain a 'freshup' kit of new cassette and toilet lid, and then to repair if possible.

If the repair works then you have a spare, or if it fails in use, you still have a replacement.
That's what I did after the same problem, I don't remember the repair parts being that expensive though.



Malcolm
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post #9 of 17 (permalink) Old 17-08-2017, 14:38 Thread Starter
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We dont know where you live Barm Pot

The clue is in the name!

Here is another clue (just in case the first clue eluded you) -
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post #10 of 17 (permalink) Old 17-08-2017, 16:44
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Plus one for the fresh up kit, 80 ish with new seat etc.
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