I have a kohler one pease model K-3434 I Have replaced all parts kohler parts the problem i had before was the flapper was not sealing properly after replacing all parts i still have the same problem nothing restricting the flapper if you just touch the top of the flapper it will stop leaking but when you let up it will start to trickel again.i have tried a nother flapper same thing.

Either the bottom outlet washer or the inlet valve washer needs replacing. It is a common condition, and if unsure, call a handyman in. An expensive plumber should not be needed.
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I have had similar problem . some one had put the wrong part in the box .Had to take the old part to the hardware store before they would believe me, and exchange it.

Hi,
The model 703 was replaced by part number 1068030. go to the kohler.com site and get to the part area and search for 1068030.

You may just need a new flapper - 1010376 part number

heatman101

Kohler toilets normally have the part numbers on the underside of the the tank lid. I was not able to find the 703 model listed on the Kohler sites; check under the tank lid there for a more complete model number and possibly a specific number for your toilet flapper.

Here is a fairly user friendly site with an illustrated selection of Kohler replacement parts. You may be able to match your model number or measure and visually match a suitable replacement:

http://www.toiletexperts.com/index.php?main_page=index&manufacturers_id=12&sort=20a&filter_id=2

Your other option is to turn off the water supply to your toilet; remove the flapper and pay a visit to your local plumbing supply store. In some cases you will be able to use a universal repalcement part as long as the means of attachment and the size are the same.

The Kohler Cimarron is one of the most popular and reliable toilets out there. (My Favorite). However, depending on the hardness of the water and if you use cleaner tabs in the tank, these factors can lead to a malfunction.
The first thing you should do is hold the flapper (rubber seal inside the tank that releases the water down to the bowl) down with your hands for a few seconds after a flush and see if the toilet stops running. Sometimes the flapper doesn't seal properly therefore the fill valve keeps working non stop. Stopping the fill while holding the flapper down will confirm that your flapper needs to be changed.
If this doesn't work then try this....
The other common problem with a running toilet is with the fill valve itself. There is an attached float on the fill valve that goes up and down depending on the water level. Once the water level rises, it rises the float, and the float tells the fill valve to stop filling the tank. While the toilet is running (hissing), try raising the float all the way up with your hand and see if it stops. If it stops but not consistently with every attempt, then you will need to change the fill valve. I believe the Fluidmaster 400A is the replacement model.

Toilets seem to run on their own because the water in the tank is seeping our past the seal that was designed to keep it in the tank inbetween flushes. Commonly called flappers, they go by seals, tank balls discs. etc. The K4632 requires a flat seal from Kohler. The actual part number is 1059291, however Kohler may only sell this as part of a kit by a different number with pieces not truely needed in your circumstance.

You should contact them at 1-800-4KOHLER, navigate the prompts, and talk to a service member. You may have to do some research in your area to find a retail or wholesale business that will order this for you. There are circumstances where, with some parts, Kohler will send the parts free to your doorstep. No promises on this one. I have put a link below that will give you a complete parts explosion for your reference.

http://www.kohlerserviceparts.kohler.com/ServicePartsPage.aspx?DocumentID=28e40a91273141a5b63e28ad7230d6a5&ModelID=e9143848792b4415a62b4e384caeb856

Found your part: http://www.kohlerserviceparts.kohler.com/AccessoriesInformation.aspx?ServicePartID=f5a368efd5b74bcfae7fa0d0bb69bd39

look under the tank, their should be a nut holding on the old one. by removing that nut the part should free itself.

That is a tricky one. Tighten the tabs, twist into place, then tighten a bit more. They are a pain in the a$$, but with patience you will get it done. Good luck

Had a similar problem with a Wellworth after changing out all the replaceable parts. The new triangle gasket + nut kit was missing the flat anti-friction ring needed to allow the plastic nut to be hand tightened enough against the rubber gasket - without the ring the friction stops the nut turning, and you get a leak because there isn't enough pressure on the gasket. Retrieved the old ring from the trash & put it in - works perfect now! not sure if this is your problem too, but you might want to check the locknut / gasket tightness & seal.