Thetford C2 Cassette Toilet info

Good evening all. Has anyone changed the blade on Thetford C2 cassette? I have looked at the Thetford site but its not very forthcoming for the C2 so any help in removing the blade and mechanism would be helpful. Thanks, David.

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I've not actually changed the blade in a cassette but have done other things following the Theford instructions in the PDF at the end of the link above, page 12.

Peter

David,

The parts list you should look at for he C2 is here.

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When you see the exploded diagram you will see how easy it is.

Best regards,

Ian

Thanks Ian, Thanks Peter. I have already looked at those sites and there in no info for the C2. I will keep trying

Dutto wrote:David,

The parts list you should look at for he C2 is here.

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When you see the exploded diagram you will see how easy it is.

Best regards,

Ian

Peter,

The address is ******** /CassetteC2ElectricPartsNEW/****** !

If that isn't your toilet then please specify which one you have because the "blade" is the same for all cassette models.

By the way, I hope that you realise that the "blade" is an optical illusion! It is inside the cassette not at the bottom of the toilet bowl.

Best regards,

Ian

Hi David,

I see Ian has posted whilst I was typing, but Hay Ho two heads are better than one

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Click on .... Repair instructions for all Thetford Sanitation Products

Then in left column ...... C2 C3 C4 C200 (+ box)

7th line down is ..... C2 C3 C4 C200 Blade

And if you can understand it first time round ..... Well done

Brian

Dear Mr Hunter

I linked you to a pdf document and referred you to page 12 where starts a detailed instruction as to how to replace the blade in a C2 cassette. Please say what is not said.

Peter

Ah time for the rubber gloves matron.....

ubuntu1 wrote:Ah time for the rubber gloves matron.....

Loo rolls at 20 paces

Brian

Dear Mr Brown. The link you gave me shows the C200 cassette and it has a different blade. As you say in your first post you say you havnt changed one. The parts list as far as I can see doesnt show a blade on it, let alone the mechanism as another post says. I know the blade is in the cassette. I too have changed components on my cassette a nuber of times. I am not a novice
Regards, David.

By Jove David you are right!!

I have just this second emailed Thetford with a query as to whether or not the C20 Parts description of "33207 - Blade opener" includes the blade.

Will get back to you when (if?) I have a response.

In the meantime throw a bit of olive oil in the pan. It works wonders for sealing and easing the mechanisms!

Best regards,

Ian

Interesting thread as I have a 'seepage' problem on my Cassette which is a C2.

What I noticed each time I removed the tank to empty it there was a slight 'watery residue' (i think you guys get the picture!), on top and around where the rubber seal is, suggesting that it's not making a totally waterproof bond to the toilet underside when in situ.

Is the blade at fault.....or the seal?

Views and suggestions welcome!

Bulletguy wrote:Interesting thread as I have a 'seepage' problem on my Cassette which is a C2.

What I noticed each time I removed the tank to empty it there was a slight 'watery residue' (i think you guys get the picture!), on top and around where the rubber seal is, suggesting that it's not making a totally waterproof bond to the toilet underside when in situ.

Is the blade at fault.....or the seal?

Views and suggestions welcome!

I would think that the seal is favourite.

I'm afraid that you will just have to get down and dirty to sort it.

First of all empty and rinse out the cassette a couple of times.

Then slide back the plate that covers the blade whilst it is in transit and wash the seal on top of the blade with plenty of warm soapy water.

Dry the seal and then rub plenty of cheap olive oil on it.

Go into the compartment and wash the bottom of the bowl with warm soapy water. Dry the area and rub a smear of olive oil over it.

Re-insert the cassette.

Go inside and pour about 1cm of cheap olive oil into the bowl (until it covers the seal) and let it sit there for half an hour.

Then do the "Open/Close" bit on the blade to lubricate the seal/blade connection and drop the oil into the cassette.

Remove the cassette and check. If there is any olive oil on the top of the cassette it is definitely the seal between the cassette and the bowl and it will have to be changed.

On the other hand, this operation may actually improve the situation so much that the seal will start working again.

Hope this helps.

Best regards,

I.ve not sorted picture's yet but can anyone confirm the above link to instructions on replacing the C2 blade?

Peter
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The above link was found purely by putting Thetford C2 in a search engine. I think if the breakdown drawing cant be followed then its time to hand over to a specialist

Gives the parts list. I have changed the seals in a C2 which are quite straight forward and obtained from most decent dealers.

The link given in Peters first response [You must be registered and logged in to see this link.] certainly includes the C2 in the repairs manual.
Brian also posted the same link.
Ians post also shows a different Parts List

Think this thread has gone on long enough now

Bulletguy wrote:Interesting thread as I have a 'seepage' problem on my Cassette which is a C2.

What I noticed each time I removed the tank to empty it there was a slight 'watery residue' (i think you guys get the picture!), on top and around where the rubber seal is, suggesting that it's not making a totally waterproof bond to the toilet underside when in situ.

Is the blade at fault.....or the seal?

Views and suggestions welcome!

After the loo has been flushed and the blade closed, the bowl will still have a thin film of water around it, which will then run down and accumulate on the top of the blade. Are you sure this isn't simply the cause of the residue you to which you refer?
As a matter of routine, I always open and close the blade before removing the cassette for emptying otherwise I find the same thing.

Good point that Roger,
also for those who are new to toilets Thetford and other Pinks can produce "black bits" when you flush

Hi there,

If Roli is thinking of closing this Thread then before it happens can I just point out that maintaining a Thetford Toilet isn't rocket science.

My tips are:

1) Wash all non-elecrical surfaces really well with COLD water to start (as warm water develops certain aromas!) then with warm soapy water, then with warm fresh water then dry everything with paper kitchen towel. (Dump the kitchen towels after one use!)

2) Keep a bucket of warm soapy water nearby to drop any pieces into after they are removed. They will ultimately need drying and lubricating if they are to be refitted.

3) Make sure that you have the replacement Parts ready before you start. (A leaky toilet is often better than no toilet!)

4) ALWAYS use a screwdriver or spanner that fits the piece you are trying to remove.

5) ALWAYS lubricate whatever you are fitting or repairing or cleaning with olive oil or silicone grease before reassembly.

6) NEVER force ANYTHING. Parts are precision made and if you have to force something to make it fit you are probably doing it wrong!

7) If all else fails READ THE MANUAL!

8) WASH AND SCRUB YOUR HANDS WHEN YOU HAVE FINISHED AND BEFORE YOU PREPARE THE NEXT FAMILY MEAL!

Hope this helps.

Best regards,

Ian

There was I following this thread and thinking I’m going to have to change that blade as I had noticed the stain as well but we have only changed the cassette twice. So I thought give it a good clean first and check when we get back at the end of next weeks trip. Then came Rogerblack and Roli’s post………simples……….

What a brilliant forum, that’s my small donation back and some thank you all for the info not just on this post but all the others as well.

Herewith the response from Thetford:

Thank you for your email

Attached is a complete spare parts list for all the toilets which we manufacture. I have also attached the sanitation repair instructions as this maybe of some use to yourself

As a rule of thumb, if a part number is not listed then unfortunately it will not be available to buy

Retailers of the spare parts can be found using the instructions below

Regards
Thetford
Customer Care

I found the blade assembly on the first pass of Sanitation Spare Parts! (There was a change in 2000 so you need to know the year.)

Best regards,

Hello Dutto. Thanks, at last some of the trees have cleared. I still cant find any repair instructions other than the C200 which has a different mechanism by the look of the parts breakdown. Anyway, thanks again for your perseverence on my behalf. I will get my hand inside and have a fiddle around now I can get an idea fron the parts list. Hope I can repay the favour some time. Regards, David.

I went through a phase of having to change the main lip seal no. 16175 on an annual basis. I never used anything other than approved chemicals but the underside of the seals kept going wrinkly and not sealing properly. I suspect that Thetford changed the rubber formulation at some stage as more recent ones have lasted much longer.

I think there were also changes in the C2 blade mechanisms. Early ones (like mine) had a blade which just slid across the seal. However later mechanisms, on closing, slid across clear of the seal then lifted upwards against the seal. In principle I suspect the latter design must have been an improvement. Not sure when this change was made but I suspect around 2000.

Hope this helps,

Bartfarst

Hi,

Just bought a 2001 Pollensa with a C200 toilet with manual flush:so_sad: , had electric previously, it was producing black bits on pumping:frustrating: , low and behold, this thread says why, then I wondered about the blade not doing a straight slide but raising at the end, answered above, brilliant!  Now, my problem, the flush was very weak so I assumed out of water so, I though I'd just empty it (to get rid of the black bits) and re-fill, guess what? A very wet me discovered it wasn't empty!  So, firstly, any ideas why the weak flush and secondly, is there any way of checking the water level in the holding tank? Also, the 'full' light for the cassette is hardly visible, can you get inside and move the bulb?
 
Thanks in advance

Peanuts

Maybe I'm not really getting the whole thing yet, but to me, once the blade gets damaged and the cassette needs significant servicing, the C2 etc affaire might be getting a bit ropey. In some cases, it could be that like me, you have purchased your van second hand and it is already several moons old (17 years in the case of mine). How many strange glutae maxima have sat up on the seat - how much alien efluent has hit the blad, or been chopped by it... how well has the cassette been cleaned out in the past.... I have ordered this:

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It includes a whole new cassette, toilet seat and chemicals all for under £90 squids..... The cassette on its own costs £145!

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If you follow the link above it will take you to a page on the Thetford web site. Click on repair instructions fro sanitation products and it will open a pdf document. Page 78 is the start of the section on stripping the manual pump which should enable you top check the operation.

I fill my flush tank every day we are in the van take a peek at the level in the cassette very time the valve is open so have no need for level indicators.

Peter