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Newbie, in a "jamb"

jbwbhs

Member
Joined
Jan 13, 2013
Messages
6
Appreciate all the good info here, been learning much from the the forum while planning a shop. In the meantime I am replacing the trans. and clutch in a m/c (k1200lt bmw) and have run into troubles and hope some on this forum might have some insights...
Has to do with a threaded steel insert in the frame which is aluminum.

http://store.bobsbmw.com/microfiche...ame+and+mounting+parts&MBike=51717&GroupID=46

This site shows the parts: click on the pic left of "frame" and the issue is the threaded bushing at the bottom of the list below (#12 ) and the frame, (#1) which is the aluminum.
To make it short, the original insert is out, and a replacement (from BMW germany, 107.00) is half way in.
The new insert was put in the freezer for 3-4 hours, the frame was heated with two heat guns to 210+ and when I tried to drive it in I only got half way. I had no help to "back" the frame while driving with a hefty hammer, and was under the bike with limited clearance but felt like I gave it 90% + of what i felt comfortable with.
Now I'm thinking some kind of hefty threaded "puller" to crank it the rest of the way, after more heat(?). Sure don't want to damage the parts, and the rear wheel suspension starts here...
So... it's pretty much out of the question to take the frame to a press, what are my options?
Thanks in advance for any thoughts, thanks again to all who put so much effort in these forums, you're a bunch better on this computer than I am.
 
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ChevyEFI

Well-known member
Joined
Sep 2, 2012
Messages
8,729
Location
Phoenix, AZ
C-clamp or balljoint clamp would be correct.
It's obviously a press-fit that needs more force than your hammer has.

Not that you'll need it on this job, but a time saver:
Freezing spray (R134-A) saves time vs. the freezer and works as well if not better.
 
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cbccadet2002

Member
Joined
May 7, 2013
Messages
18
u really need to press it in rather than beat it in. But the shouldnt be that tight either. .0003 .0005 interferance i would think. A c clamp should work but might be a pain with rying to twist off. Anyway to get a real pic? And make sure ur leading it in with the beveled edge. If ur going in opposite there's a good chance to booger up the pathur trying to travel.
 

cbccadet2002

Member
Joined
May 7, 2013
Messages
18
Ohh and take it easy on the heat. if ir pressing into aluminum u shouldnt need any heat. some lube might do the trick ;). Honestly i'd try to remove the piece and give it another go. If ya have to, pick up some locktite assembly adhesive, if you have to end up lightly reworking the part to fit.
 
OP
J

jbwbhs

Member
Joined
Jan 13, 2013
Messages
6
The c-clamp didn't do it. I used the shaft from a spring compressor and got washers to make a press. Took quite a bit of heat and cooled the insert with propellant. Was not an easy press. But it worked, and the work proceeds... thanks for the suggestions
 
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