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Old 09-30-12, 04:18 PM   #1
RaleighSport
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Tips for changing a threaded headset please.

Hi, this isn't my first rodeo but this time the stakes are much higher then before. I have a Shimano 600 arabasque headset I want to put on my bike, the inside was faced etc for the previous generic same size headset I have on the bike currently, but the 600 headset is in another bike. I have previously used the screwdriver (not sharp)/mallet method for removal, I also am capable of removing the fork race without issue. What I'm looking for here, is maybe an outline of how to do this smoothly and any common mistakes I might make? I have only done this a few times now. I have a pipe for setting the fork race, a rubber mallet and some 2x4 or 2x6 or 4x4 etc for setting the headtube cups... I hope I supplied enough info too! Thanks in advance.
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Old 09-30-12, 04:29 PM   #2
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Other than the proper tools I think you have things under control.

I have an old crownrace I always use upside down, like a buffer, when installing a new crown race. Even with the proper tools this method helps prevent damage to the new crown.
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Old 09-30-12, 09:43 PM   #3
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Quote:
Originally Posted by Bianchigirll View Post

I have an old crownrace I always use upside down, like a buffer, when installing a new crown race. Even with the proper tools this method helps prevent damage to the new crown.
+1, this or an old washer or whatever to ensure that the crown is pressed from it's inner edge is good practice.
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Old 09-30-12, 09:44 PM   #4
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+1, this or an old washer or whatever to ensure that the crown is pressed from it's inner edge is good practice.
It's PVC pipe, does that help?
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Old 09-30-12, 09:53 PM   #5
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It's PVC pipe, does that help?
PVC pipe against a steel crown race, it doesn't really matter since the pipe can't ding the race. OTOH, having a target that doesn't have a sharp lip might protect the pipe's edge.
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Old 09-30-12, 10:33 PM   #6
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Since you mention a Shimano 600 Arabesque, I'm thinking this in 1-inch threaded systems.

Make sure both headsets are the same. Headsets of that era came in JIS and ISO standards, and they aren't interchangeable. I once had an Eisentraut frame handed to me that had been built for a JIS headset and had an ISO headset crammed into it. The headset cups didn't fit, had expanded the head tube, and ruined the frame.

http://sheldonbrown.com/cribsheet-headsets.html
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Old 09-30-12, 10:56 PM   #7
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Just out of interest, does this older headset have a recess or raised lip for the tabbed washer so it can't pop out of the groove like a later 600 headset?
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Old 10-08-12, 06:02 PM   #8
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Just out of interest, does this older headset have a recess or raised lip for the tabbed washer so it can't pop out of the groove like a later 600 headset?
Well as it is indeed a later 600 headset yes

Wanted to thank you guys, everything went smoothly.

Quote:
Originally Posted by Jeff Wills View Post
Since you mention a Shimano 600 Arabesque, I'm thinking this in 1-inch threaded systems.

Make sure both headsets are the same. Headsets of that era came in JIS and ISO standards, and they aren't interchangeable. I once had an Eisentraut frame handed to me that had been built for a JIS headset and had an ISO headset crammed into it. The headset cups didn't fit, had expanded the head tube, and ruined the frame.

http://sheldonbrown.com/cribsheet-headsets.html
The only hiccup like that was crown race size, and that was easily fixed with a different one from my pile! Good looking out though.
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Old 10-10-12, 09:58 AM   #9
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I thought the 'arabesque' stuff was the 70s gear, like so:

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Old 10-10-12, 10:43 AM   #10
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Quote:
Originally Posted by Kimmo View Post
I thought the 'arabesque' stuff was the 70s gear, like so:

It's a star nutted 600 headset for sure, but it seems to be newer then I first suspected (It had come on a backup bike). I can double check the model later if you'd like.
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Old 10-10-12, 11:25 AM   #11
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Well as it is indeed a later 600 headset yes
So I think it isn't a later one; I've had a few from the tricolour gruppos, and they all have the normal flats AFAIK.

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File Type: jpeg E1960068-AC84-462A-B06A-D637DCAD5232.jpeg (20.7 KB, 3 views)
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Old 10-10-12, 09:08 PM   #12
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So I think it isn't a later one; I've had a few from the tricolour gruppos, and they all have the normal flats AFAIK.

Very interesting, I was looking at the top nut today for anything identifying but there really wasn't.. however a little research shows it as 600ex/arabasque. So yes my old one has a tabbed washer for the steerer tube notch.
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Old 10-11-12, 12:07 AM   #13
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If you ever get tired of using the hammer and screwdriver for removal
of headset races, you can make a pretty serviceable one out of electrical
conduit in the appropriate diameter and a hacksaw to split it part way
into four prong arms like the commercial tools.
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