Fixing Fordham Cistern - Instructions

[AndyPRoberts]

Fordham Cistern

• AndyPRoberts
• 14 Dec 2021

Fordham P 1035 Cistern

Fordham Cistern Parts

• AndyPRoberts
• 14 Dec 2021

to replace the parts of Fordham P1035 Cistern

The plastic arm in our Fordham cistern is splitting and I am fairly sure I've found the replacement parts to order (see above) but I can't find any instructions on how to dismantle the old cistern or insert the new one - do such instructions exist or come with the parts (probably not) or can someone confirm my guess about how it goes together?
It looks to me that with a bit of force I should be able to remove the plastic "pin" / pivot" (which is at the bottom middle of my picture and is the piece in the middle of the picture of the replacement parts). Is this the correct way of dismantling this mechanism?
My main worry is that the replacement piece in the kit seems slightly longer than would fit into my cistern - could the replacement kit be for a different but very similar cistern?

Thanks for any comments or advice

Andy