Delta shower faucet and tub spout--No hot water

Turn off main water valve first.

Big chrome ring should unscrew readily counterclockwise. Do not force it, because those teeny copper tubes behind the valve will twist off or pinch.



Copper tubes visible here.
Didn't get a picture, but there was a pea gravel sized chunk of rust in the hot water valve side.
That was enough to choke off hot water flow.

Old tub spout did not want to come off. I started cutting it off. Here is the little 1/2 inch pipe stub the spout attaches to. The threads were totally gunked up with plumbers putty or something.

Old tub spout fragments. Had to hacksaw off the shower diverter stem.

New tub spout installed.

References:

http://www.askmehelpdesk.com/plumbing/just-warm-water-stand-alone-shower-7021.html

http://www.masterplumber.net/delta/delta_single.htm

http://www.jammersix.com/archives/how-to-fix-repair-a-leaky-delta-shower-head-faucet/

http://www.askmehelpdesk.com/plumbing/no-hot-water-shower-but-plenty-hot-water-sink-7774.html

http://www.askmehelpdesk.com/plumbing/just-warm-water-stand-alone-shower-7021.html