Thank you for your question! To get to the handle, first pop off the temperature cover and remove the Phillips head screw holding the dial in place. You can then slide off the dial, rotational limit stop, and volume handle. Install the new volume hand and the other parts in the reverse order. The How-To Video linked below will also walk you through this process. Please be sure that the water supplies are turned off if you disassemble the valve any further.http://www.deltafaucet.com/tools-re...