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Old 07-28-07, 05:05 PM   #1
JRIDERNY
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Is O_Ring crucial on a King Headset?

While installing a new1 1/8 Chris King (threadless) headset on a 700c. Marzoochi fork, everything went ok except for the "plastic like" o-ring washer that sits under the bearing cap(not the stem cap). The bearing cap itself was a little snug, but I feel thats how its designed. Anyway, this O_ring seal is actually too small for the stem cap, you would have to really strech it...to get it on, I did, but with a flashlight looking through the little space between the top cup and the cap, the o-ring seal looked "buckled" and seemed to impair a good fit of the bearing cap on the top cup. So, I re-installed stem,cap, spacer, etc.witout the O-Ring seal and everything sits better. Should I leave it alone without the O-ring seal? or give it another go, ( or just avoid wet weather riding,which is already the case).. Will the headset perform just as well without it?
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Old 07-28-07, 06:09 PM   #2
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It's been a while since I took my headset apart, but I believe the o-ring goes between the bearing cap and the bearing. It should be a fairly tight fit over your steer tube.
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Old 07-29-07, 12:51 AM   #3
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0-ring

Quote:
Originally Posted by JRIDERNY View Post
everything went ok except for the "plastic like" o-ring washer that sits under the bearing cap.
o-ring resides in a machined groove in the middle of the bearing cap, not under it.

http://www.chrisking.com/tech/tech_headsets.html
http://www.chrisking.com/pdfs/NoThreadSet.pdf

Final Assembly and Adjustment:
Prior to installing the bearing cap on a threadless steerer tube, round off the top of the steerer tube to avoid sheering the o-ring on the inside of the bearing cap.

Re-install o-ring into bearing cap.

Insert fork into frame.

Taking care not to shear o-ring, slide bearing cap, any spacers, and then stem over steerer tube. Place stem cap on top of stem and insert screw through cap, threading into star nut. Tighten approx. 4-10 in.-lb. (Max. 15 in. lb.)
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Old 07-29-07, 09:36 AM   #4
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Thanks

I"ll look for that"machined groove" in the bearing cap, although I already tried to put it in that exact spot. I"ll try again.
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Old 07-29-07, 12:16 PM   #5
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O_ring ok.!!(my mistake)

After checking inside the bearing cap, the O-Ring was there, properly positioned!!. My own over-concern led to mistaking the extra White, plastic washer-seal that came with the headset as as the O-ring...my stupidity... this washer is something most people/shops don"t eve probably use...it came with set under the STEM CAP ,probably to prevent scarring, and use is optional upon installing. (And the O_RING is in the machined groove!) Thanx
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Old 07-30-07, 09:49 AM   #6
xB_Nutt
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Anyone know where I can get a replacement O-Ring for Chris King NoThreadSet?
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Old 07-30-07, 09:55 AM   #7
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king

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Originally Posted by xB_Nutt View Post
Anyone know where I can get a replacement O-Ring for Chris King NoThreadSet?


Please contact us with any small parts questions:
info@chrisking.com or 800.523.6008
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Old 07-30-07, 02:43 PM   #8
JRIDERNY
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mystery washer for king set

Thanks to this forum, I discovered where the "mystery washer" goes... on Top of the Bearing cap and below the lowest spacer(I only use one). I found this out by calling" King info" at the given phone number...they admit this info is not on the instruction sheet,nor on the parts list, and will be correctted. It Fits Fine!!!
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