I had the same problem with an aluminum post stuck in a steel Bianchi Volpe frame. I tried all matter of twisting, tapping, penetrating, etc. I finally pulled the bottom bracket and turned the bike upside down. Ran about 2 or 3 cups of ammonia down the seat tube and let it sit overnight, did the same again the next day. On the third day I was able to work it out of the frame. The post was ruined but my frame was still intact.
Ammonia works well when it’s a chemical bond between steel and aluminum. From what I’ve read the penetrating oil won’t really help in this situation. On Jun 24, 5:20 am, Robert Linthicum <linthi...@gmail.com> wrote: > Thanks very much for the suggestions. I particularly like the advice > to wait a while & let the penetrant do its thing, because that is what > I'm doing now. I have the bike in my living room to remind myself to > drip a little more liquid wrench in every day, and to give the > seatpost a daily nudge or two for encouragement. I have been riding > with the seatpost bolt completely removed, and I spread the seatpost > bolt collar a bit with a flat-blade screwdriver. I went out for a ride > and took care to put as much of my weight on the saddle as possible, > but no luck. > > Since, as I mentioned, the thing is at the correct height, I've got > some time. My main concern about this situation is that my sons won't > be able to ride the bike, when they are big enough, and they are gonzo > cyclists. > > I am taking the Zen approach, for the moment. I will prevail. > > Best regards, > Bob > > On Jun 23, 10:16 am, Jim Thill - Hiawatha Cyclery > > <thill....@gmail.com> wrote: > > I'm with Bill C. Let it soak in a few applications of penetrating oil > > for a few days or a few weeks. It would probably be foolish to destroy > > the seatpost, since it's at the correct height. > > > On Jun 23, 5:23 am, Bob <linthi...@gmail.com> wrote: > > > > My daily rider, a vintage steel Trek, is now afflicted. This is > > > embarrassing, because I remember pulling the post about two years ago > > > and slathering it with Phil Wood grease and Park Anti-Seize. Oh well. > > > > Thus far, I have tried removing the saddle and tapping with a mallet > > > and wooden block; heating with a hair dryer after dripping Liquid > > > Wrench and other penetrants from all sides; and just about every > > > technique Sheldon recommended on his site. > > > > I am trying not do do something so rash that I damage any equipment. > > > > Luckily, the seat height is just about right, but I just can't sleep > > > knowing one of my rides has a frozen 'post. > > > > Word to the wise: Pull your post occasionally, because you can . . . > > > > Peace, > > > Bob --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To post to this group, send email to rbw-owners-bunch@googlegroups.com To unsubscribe from this group, send email to rbw-owners-bunch+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rbw-owners-bunch?hl=en -~----------~----~----~----~------~----~------~--~---
