Motorhome mirrors frozen

[hdhogman]

I have a 2006 Tiffin Openroad that the mirror pivots at the base mount are faze up and cannot adjust. I have tried to soak with WD-40 and PB blaster with no luck. It has 1 bolt through bottom that locks it in place via a taper. I did try to shock with rubber mallet, no luck. Any suggestions would help.
I was going to remove but wire connections buried in spray foam

 

[Jarwop]

I would try to remove from the RV, I assume it is metal. Then you could mount in a vice upside down and soak with the PB Blaster through the locking bolt hole. Next, Secure in the vice with the jaws stradling the arm so the base is sitting on the vice jaws. Screw in the locking bolt, but leave extended some. Now the base is supported (above the jaws), the arm is free between the vice jaws, and the locking bolt is screwed into the taper of the arm and pointing up. The screw is not tight and extended some. Now smack the bolt head with a metal hammer. Some would say tap it. Mabe tap it, and it won't free up, them smack it. If it works, you saved a few hundred dollars for new mirrors ( as you would want a pair to match). Touch up with paint and maybe a little antisieze on the taper. Gotta have adjustable mirrors working on the rig.

 

[Captain Spaulding]

I’d guess those might have a detente so they only move when you hit something. Have you tried to lift on the arm at the base or tap upward with a mallet? It looks like if it was just a pivot point that wind would drive them back toward the RV when driving. The length of arm there should give enough leverage to allow twisting of even a rusty bolt.

But, I’m not the guy who’s going to be standing there cussing with a broken mirror in my hand if something goes wrong, so take it with a grain of salt.

 

[manwithtools]

Those things can be a ***** to get loose. I had similar issues with the same style mirrors on our 2007 Safari. I had to apply multiple applications of penetrating oil and then work it back and fourth forever before I got it apart. Much corrosion in the joints. Be careful, that's likely a $5-7 hundred dollar mirror. I think I ended up using Kroil on it.

 

[ez-duzit]

...ended up using Kroil on it.

This is what works. Plus heat.