Toto toilet ultra max flush

Check flushing mechanism at the bottom of tank to check if it vopens and closes securely. and nothing blocks it.

It could be the type of flap you are using. I would suggest you try a different shaped flapper (a cone would work best) and if that doesn't do it, put a new kit into the unit, because it could be that the float system is sticking causing it to continue running.

if the flapper is on a chain, you just need to shorten slack on chain to handle.

If i recall correctly there is a retaining nut on the inside of the tank, this will slide down the interior lever toward the chain.
It MAY be reverse threaded, I am not sure but wished to suggest enough caution.

move the chain to a different slot on the handle it is pulling the flapper up too far

hi , replace your flapper on your flush valve assembly .
the link below is a spares dealer in the US
http://www.guillens.com/Toto/Flappers.htm

hope this helps
p.s. these parts do wear out

Is it not refilling the tank or the bowl? I've got a toto also that is not fully refilling the bowl after each flush. No leaks or other problems. Tank refills fine. Seems that the flapper doesn't float long enough to allow a sufficient amount of water to drain into the bowl before closing. Any ideas?

did you try a new flapper? sometimes those are the reason they wont flush properly. check out the american standard cadet 3 it's half as much as a toto and works just as well

One of two things is the problem. First, make sure that you have a tight chain with little slack. If there's too much slack, the flapper won't catch in the passing air to stay up. Second, the flapper is not correct for that style of toilet. You might want to look into purchasing a new Kolby filter that has a removeable cone in the center. Move that cone to 12 o'clock to allow the maximum amount of water to run through the flush valve. If the flapper you have now is flat, it needs to have a cone in the center on the underside.

check the discharge hole, meaning you have to take down the toilet.
and make sure the water in the tank is at a proper high. you need the volume to create the wirlpool and push the waste.