Here are the instructions for the reverse conversion. Seems there's a leak limiter plug and pin involved as well.
"Re: Kenmore Dryer LP to Natural Conversion
Hi,
You should have gotten a leak limiter in the Nat kit,
with the orifice. Just a small brass plug that screws into
the top of the regulator. The LP version has a pin
attached that holds the reg open, the Nat version's just
a plug, with no pin.
Be careful handling the igniter when doing the conversion.
These are very brittle, and shouldn't be dropped or
bumped.
Most guys pull the entire valve/burner assy to do this,
but it's unnecessary. I only pull the burner itself to do
this job. Prevents any possibility of gas leaks at the union.
You can do it this way without even turning off the gas.
Basically two 5/16" screws and just the burner assy -
with igniter attached - comes out, after which you can
replace the orifice using a little 3/8" box-end wrench.
The leak lim can just be grabbed with a pliers. Not a
tough job, this one's easier than it sounds.
Hope that's of some help.
God bless,
Dave Harnish
Dave's Repair Service
New Albany, PA
www.DavesRepair.com
drs@sosbbs.com
570-363-2404 "