Toilet cassette maintenance

Discussion in 'Tech/Mech General' started by Dolomite Pete, Feb 19, 2015.

  1. Dolomite Pete

    Dolomite Pete Read Only Funster

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    The center of the toilet cassette shown in the pic looks like it should rotate and come out for maintenance? is that the case as mine doesn't won't to rotate. It may just need a bit more force but I thought I'd consult the forum first. The mechanism has got stiff and I think the seals may need replacing. Presumably this stuffs all available? Any advice appreciated.
    Cassette 1.jpg

    Cassette 2.jpg
     
  2. DavidG58

    DavidG58 Funster

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  3. phase3begins

    phase3begins Read Only Funster

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    Don't think it does rotate. Never tried but....

    Google thetford cassette parts diagram which should give some idea of the construction
     
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  4. DiggerJon

    DiggerJon Funster

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    If it ain't broke..........
     
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  5. Dolomite Pete

    Dolomite Pete Read Only Funster

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    The reason to want to remove the plate is due to the mechanism becoming stiff and the seal for the operating spindle leaking a bit.
     
  6. Mousy

    Mousy Funster Life Member

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    @Techno100 did a very good thread on taking his apart to clean it.

    Try a search, I think he might of replaced the seals too.
     
  7. tonka

    tonka Funster Life Member

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    Go to the Thetford website.. Lots of info on doing repairs etc..

    BUT as above.. "if it aint broke etc"
     
  8. Mousy

    Mousy Funster Life Member

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    Have you tried spraying silicon lubricant?
     
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  9. GJH

    GJH Funster Life Member

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    It doesn't rotate. As you are probably aware, the centre cover slides out to reveal the seal and the disc which is opened when the toilet is in use. The disc can be opened by twisting the green knob.

    When the cover is removed there may be some screws visible depending on model. The two bars either side of the cover pull off and reveal more screws. Removing the screws allows the seal to be removed (and also gives access for more thorough cleaning).

    Thetford sell special stuff for cleaning/lubricating the seal but olive oil is as good in my experience (not sunflower or vegetable oil or other lubricants). You may find the seal has hardened but replacing it (check eBay, much cheaper than the full kit) is easy. The original can then be rubbed with olive oil and may recover its suppleness enough to be used as a spare.

    Thetford have maintenance manuals downloadable at their web site.
     
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  10. Techno

    Techno Funster Life Member

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    Mine is a C200 the one pictured is a different model but which one?
     
  11. Lenny HB

    Lenny HB Funster

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    Yep it just rotates, if you open the flap you can put your hand in to get a bit more pressure it is quite stiff.
    Take a note of which way it was fitted as it can be fitted the opposite way round, this is for for LH or RH fitting.
     
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  12. Lenny HB

    Lenny HB Funster

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    From the photo I would say it's a C400 series, the bench seat models.
     
  13. Techno

    Techno Funster Life Member

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    It actually looks out of parallel in the picture, could that be why it is stiff?
     
  14. Lenny HB

    Lenny HB Funster

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    It does rotate the older ones had screw fitting no screws on the newer ones.
     
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  15. GJH

    GJH Funster Life Member

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    Thank you Lenny. I've only used the old fashioned ones :D
     
  16. Roryboys Dad

    Roryboys Dad Read Only Funster

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    It does move.

    If you look alongside the Red marker on the picture you can see an 'arrow' indentation.

    Move the Red marker anti clockwise towards the Blue marker and then you can lift it off and access the interior.

    It is usually stiff to move, it's supposed to be a tight fit, but if you slide the lid across it's easier to get a grip and move it round.

    To spend around £60, as suggested earlier, for a new Cassette rather than spend a few minutes cleaning or easily repairing the cassette seems to reinforce the theory that a fool and his money are soon parted.

    Cassette 2.jpg
     
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  17. Lenny HB

    Lenny HB Funster

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    Nar it's his lope sided photo.:LOL:
     
  18. Dolomite Pete

    Dolomite Pete Read Only Funster

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    Cassette 3.jpg Thanks to all who have replied, I put a little more force on and it rotated out easily, as you can see from the photo. Its now very easy to clean and lub the seals with with the Thetford spray which I do have. I like the olive oil advice though. Many thanks for your help guys.
     
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  19. Gromett

    Gromett Funster

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    Was just about to post my adventures with this very subject.

    http://www.fulltiming.info/fulltiming/another-toilet-disaster

    But you have got it done already so well done....

    I put a new one in mine and now once every 3-6 months I strip it down and soak it in citric acid to get rid of limescale build up. I am a fulltimer so it happens quicker for me.

    The stiffness is what caused my rod to break so preventative maintenance is required for my setup I think.
     
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  20. phase3begins

    phase3begins Read Only Funster

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    Live and learn. Thanks
     
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