Need help identifying and replacement instructions

[Brabbit]

Good morning all,

Just bought a new home that's about 10 years old. The shower head has started to drip, I have done a little research and taken off the shower head and the problem still exists. The shower handle is the problem I feel but I can't find any information on it or removal instructions. Most with this design have a screws that holds it on but mine has none. I've oncluded some pictures of what I'm working with. Any help would be greatly appreciated!

 

[johnjh2o]

The white insert on the handle comes off and the is a screw under it to remove the handle. Here is a breakdown of it's parts. take a look at the insulation guide.
http://www.faucetdirect.com/kohler-...lve-trim-only-with-metal-lever-handle/p177084