|
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Cleaning inside of seat tube after removing seized seatpost
Earl Grey wrote:
Hi, I managed to remove two seized aluminum seatposts from a steel frame tandem, but even after I had broken the bond, the posts were very difficult to remove. The seatposts are stained brown from rust in the seat tubes. So I am thinking that I should thoroughly clean the inside of the seat tubes (and the outside of the posts) to make sure that they will move smoothly, and that there is enough space between the post and tube for a good coating of grease. I'll probably try Bon Ami and Scotchbrite for the posts, but the tubes are trickier. Any ideas? If it matters, the bottoms of the seat tubes are sealed off from the BB shells. I thought gun shops may have appropriate supplies, but the I/D of the tubes is 29.4 mm, and the biggest common shotgun I/D is about 19.7 mm... Cheers, Earl Grey What about a flex-hone? |
Ads |
#2
|
|||
|
|||
Cleaning inside of seat tube after removing seized seatpost
Hi,
I managed to remove two seized aluminum seatposts from a steel frame tandem, but even after I had broken the bond, the posts were very difficult to remove. The seatposts are stained brown from rust in the seat tubes. So I am thinking that I should thoroughly clean the inside of the seat tubes (and the outside of the posts) to make sure that they will move smoothly, and that there is enough space between the post and tube for a good coating of grease. I'll probably try Bon Ami and Scotchbrite for the posts, but the tubes are trickier. Any ideas? If it matters, the bottoms of the seat tubes are sealed off from the BB shells. I thought gun shops may have appropriate supplies, but the I/D of the tubes is 29.4 mm, and the biggest common shotgun I/D is about 19.7 mm... Cheers, Earl Grey |
#3
|
|||
|
|||
Cleaning inside of seat tube after removing seized seatpost
On May 3, 11:21*am, Earl Grey wrote:
Hi, I managed to remove two seized aluminum seatposts from a steel frame tandem, but even after I had broken the bond, the posts were very difficult to remove. The seatposts are stained brown from rust in the seat tubes. So I am thinking that I should thoroughly clean the inside of the seat tubes (and the outside of the posts) to make sure that they will move smoothly, and that there is enough space between the post and tube for a good coating of grease. I'll probably try Bon Ami and Scotchbrite for the posts, but the tubes are trickier. Any ideas? If it matters, the bottoms of the seat tubes are sealed off from the BB shells. I thought gun shops may have appropriate supplies, but the I/D of the tubes is 29.4 mm, and the biggest common shotgun I/D is about 19.7 mm... Cheers, Earl Grey Clean really well. Once you've done that, take it to a bike shop that has a seat tube reamer if you can. Any bike shop that works with steel bikes ought to have one, particularly if they worked with italian frames. They should leave it so that the proper seatpost glides smoothly in and out, when clean, with a little pressure, even with no grease. |
#4
|
|||
|
|||
Cleaning inside of seat tube after removing seized seatpost
On May 3, 1:35*pm, " wrote:
On May 3, 11:21*am, Earl Grey wrote: Hi, I managed to remove two seized aluminum seatposts from a steel frame tandem, but even after I had broken the bond, the posts were very difficult to remove. The seatposts are stained brown from rust in the seat tubes. So I am thinking that I should thoroughly clean the inside of the seat tubes (and the outside of the posts) to make sure that they will move smoothly, and that there is enough space between the post and tube for a good coating of grease. I'll probably try Bon Ami and Scotchbrite for the posts, but the tubes are trickier. Any ideas? If it matters, the bottoms of the seat tubes are sealed off from the BB shells. I thought gun shops may have appropriate supplies, but the I/D of the tubes is 29.4 mm, and the biggest common shotgun I/D is about 19.7 mm... Cheers, Earl Grey Clean really well. Once you've done that, take it to a bike shop that has a seat tube reamer if you can. Any bike shop that works with steel bikes ought to have one, particularly if they worked with italian frames. They should leave it so that the proper seatpost glides smoothly in and out, when clean, with a little pressure, even with no grease. Thanks, sounds like good advice. But do you have any advice on how to clean the tube? |
#5
|
|||
|
|||
Cleaning inside of seat tube after removing seized seatpost
On May 3, 1:21*pm, Earl Grey wrote:
Hi, I managed to remove two seized aluminum seatposts from a steel frame tandem, but even after I had broken the bond, the posts were very difficult to remove. The seatposts are stained brown from rust in the seat tubes. So I am thinking that I should thoroughly clean the inside of the seat tubes (and the outside of the posts) to make sure that they will move smoothly, and that there is enough space between the post and tube for a good coating of grease. I'll probably try Bon Ami and Scotchbrite for the posts, but the tubes are trickier. Any ideas? If it matters, the bottoms of the seat tubes are sealed off from the BB shells. I thought gun shops may have appropriate supplies, but the I/D of the tubes is 29.4 mm, and the biggest common shotgun I/D is about 19.7 mm... Cheers, Earl Grey Hi there. I used a rag with varsol. Squeeze out the excess varsol so the rag is just really damp. You can make a rod from a length of dowel wrap the rag arounfd the dowel and secure it so it can't fall off. Swab the tube, changing rags as needed, until the tube interior is clean to your satisfaction then dry the tube with another piece of rag. You can then lightly grease another piece of rag and apply it to the interior of the tube if you like. Cheers from Peter |
#6
|
|||
|
|||
Cleaning inside of seat tube after removing seized seatpost
Earl Grey wrote:
I managed to remove two seized aluminum seatposts from a steel frame tandem, but even after I had broken the bond, the posts were very difficult to remove. The seatposts are stained brown from rust in the seat tubes. So I am thinking that I should thoroughly clean the inside of the seat tubes (and the outside of the posts) to make sure that they will move smoothly, and that there is enough space between the post and tube for a good coating of grease. I'll probably try Bon Ami and Scotchbrite for the posts, but the tubes are trickier. Any ideas? If it matters, the bottoms of the seat tubes are sealed off from the BB shells. I thought gun shops may have appropriate supplies, but the I/D of the tubes is 29.4 mm, and the biggest common shotgun I/D is about 19.7 mm... " wrote: Clean really well. Once you've done that, take it to a bike shop that has a seat tube reamer if you can. Any bike shop that works with steel bikes ought to have one, particularly if they worked with italian frames. They should leave it so that the proper seatpost glides smoothly in and out, when clean, with a little pressure, even with no grease. Earl Grey wrote: Thanks, sounds like good advice. But do you have any advice on how to clean the tube? bore polisher: http://www.discount-tools.com/sup-bpm.cfm Degrease throughly first. For further reading: http://www.yellowjersey.org/goodn.html -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#7
|
|||
|
|||
Cleaning inside of seat tube after removing seized seatpost
"Earl Grey" wrote in message ... Hi, I managed to remove two seized aluminum seatposts from a steel frame tandem, but even after I had broken the bond, the posts were very difficult to remove. The seatposts are stained brown from rust in the seat tubes. So I am thinking that I should thoroughly clean the inside of the seat tubes (and the outside of the posts) to make sure that they will move smoothly, and that there is enough space between the post and tube for a good coating of grease. I'll probably try Bon Ami and Scotchbrite for the posts, but the tubes are trickier. Any ideas? If it matters, the bottoms of the seat tubes are sealed off from the BB shells. I thought gun shops may have appropriate supplies, but the I/D of the tubes is 29.4 mm, and the biggest common shotgun I/D is about 19.7 mm... Cheers, Earl Grey Brake cylinder hone. Just one example at: http://www.drillspot.com/products/53..._cylinder_hone Dirt cheap, available any El Rancho Cheapo auto supply supermarket and worked for me. Otherwise length of 5/8 or 3/4 wooden dowel with long slot cut in end to take strips of abrasive cloth (cut from a portable belt sander belt to length and width that suits) or cotton cloth of your choice soaked in solvent or cleansing paste. If using abrasive cloth use two strips back to back so it abrades coming and going if you get what I mean. Tape end of slot tightly closed so strips of whatever don't fall out. Also worked for me. PH |
#8
|
|||
|
|||
Cleaning inside of seat tube after removing seized seatpost
On May 3, 10:52*pm, "Peter Howard"
wrote: "Earl Grey" wrote in message ... Hi, I managed to remove two seized aluminum seatposts from a steel frame tandem, but even after I had broken the bond, the posts were very difficult to remove. The seatposts are stained brown from rust in the seat tubes. So I am thinking that I should thoroughly clean the inside of the seat tubes (and the outside of the posts) to make sure that they will move smoothly, and that there is enough space between the post and tube for a good coating of grease. I'll probably try Bon Ami and Scotchbrite for the posts, but the tubes are trickier. Any ideas? If it matters, the bottoms of the seat tubes are sealed off from the BB shells. I thought gun shops may have appropriate supplies, but the I/D of the tubes is 29.4 mm, and the biggest common shotgun I/D is about 19.7 mm... Cheers, Earl Grey Brake cylinder hone. Just one example at:http://www.drillspot.com/products/53...44_brake_cylin... Dirt cheap, available any El Rancho Cheapo auto supply supermarket and worked for me. Otherwise length of 5/8 or 3/4 wooden dowel with long slot cut in end to take strips of abrasive cloth (cut from a portable belt sander belt to length and width that suits) or cotton cloth of your choice soaked in solvent or cleansing paste. If using abrasive cloth use two strips back to back so it abrades coming and going if you get what I mean. Tape end of slot tightly closed so strips of whatever don't fall out. Also worked for me. PH Thanks for all the good advice. In further searching, I found a very detailed article on honing and reaming a seat tube: http://poehali.net/content/b00007/07...be_milling.pdf Cheers, EG |
#9
|
|||
|
|||
Cleaning inside of seat tube after removing seized seatpost
http://www.biketoolsetc.com/index.cg...&sc=Flex-Hones Tide, mixed into a fluid paste thne brushed in degreases, removes dirt (rust). brush slowly, add water. clean rinse repeat. unless you know someone at McClaren or John's Hopkins, a TV camera is unlikely so assume the tube is half done. dry thoroughly, hair dryer/heat gun/infrared. DRY DREY DRY. coat with thinned linseed oil and dry dry dry. coat linseed with thinned rustoleum semi gloss white - 2 coats. dry dry dry reassemble with a 1/2 1/2 or ??? its fingerpaint - linseed straight mixed with aluminum anti seize as a tube grease. remaining rust will if DRY consume the supply of H20 and 02 then starve into a very hard relatively inert mass contracting over time to somewhat loosen itself from the host's depression. the assemble will outlive you. |
#10
|
|||
|
|||
Cleaning inside of seat tube after removing seized seatpost
On May 3, 11:48*am, AMuzi wrote:
*Earl Grey wrote: I managed to remove two seized aluminum seatposts from a steel frame tandem, but even after I had broken the bond, the posts were very difficult to remove. The seatposts are stained brown from rust in the seat tubes. So I am thinking that I should thoroughly clean the inside of the seat tubes (and the outside of the posts) to make sure that they will move smoothly, and that there is enough space between the post and tube for a good coating of grease. I'll probably try Bon Ami and Scotchbrite for the posts, but the tubes are trickier. Any ideas? If it matters, the bottoms of the seat tubes are sealed off from the BB shells. I thought gun shops may have appropriate supplies, but the I/D of the tubes is 29.4 mm, and the biggest common shotgun I/D is about 19.7 mm... " wrote: Clean really well. Once you've done that, take it to a bike shop that has a seat tube reamer if you can. Any bike shop that works with steel bikes ought to have one, particularly if they worked with italian frames. They should leave it so that the proper seatpost glides smoothly in and out, when clean, with a little pressure, even with no grease. Earl Grey wrote: Thanks, sounds like good advice. But do you have any advice on how to clean the tube? bore polisher:http://www.discount-tools.com/sup-bpm.cfm Degrease throughly first. For further reading:http://www.yellowjersey.org/goodn.html -- Andrew, what is with the melted looking SR (?) seat post. It looks like you went at that thing with a plasma torch. And I don't get the last picture with the benign looking Cinelli stem with melted and broken looking stuff. What happened there? -- Jay Beattie. |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Seized Seat Post | BeeRich | Techniques | 14 | November 19th 08 02:40 AM |
Setback seatpost - why not smaller seat tube angle? | Konstantin Shemyak | Techniques | 6 | April 9th 06 01:51 AM |
What size tube inside a KH Trials 20" | iamthewaltrus | Unicycling | 8 | May 11th 05 12:37 AM |
Help sought : removing helicomatic block seized to hub | Philip TAYLOR | UK | 5 | May 28th 04 04:07 PM |
Seized Seatpost | Tony B | UK | 11 | May 4th 04 10:35 AM |