KCNC K-Type Installation/Preload

Discuss light weight issues concerning road bikes & parts.
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whydobearsxplod
Posts: 159
Joined: Tue May 08, 2012 3:10 am
Location: Santa Barbara

by whydobearsxplod

The instructions that came with my K-Type are either lacking or intended for a different crank. The one I have includes a preload collar on the NDS which doesn't even appear in the instructions. What is the appropriate installation procedure and method for setting preload? Should I use grease or loctite on any bolts/interfaces? :noidea:

whydobearsxplod
Posts: 159
Joined: Tue May 08, 2012 3:10 am
Location: Santa Barbara

by whydobearsxplod

I received instructions from KCNC. Posting them here in case anyone else is in search of this:

1. Loosen small bolt on red preload collar and install on non-drive-side crank arm.

2. Apply anti-seize grease on axle bolt, splines and arm sockets of the drive side.

3. Tight the drive side axle bolt, tight it to dead end.

4. Apply anti-seize on axle.

5. Put the axle through BB.

6. Again, apply anti-seize grease on bolt, splines and arm socket of non-drive-side.

7. Tighten the non drive side axle bolt to dead end.

8. Adjust the final gap/clearance on red spacer/clamp bolt. You don’t necessary need to make it very tight as long or the BB bearing can overload. (They also gave me a guideline of 3Nm.)

The anti-seize coating seems to help eliminate some clicking sounds I was getting when I used standard grease.
Last edited by whydobearsxplod on Tue May 06, 2014 6:42 pm, edited 1 time in total.

FilmAt11
Posts: 258
Joined: Sun Jan 09, 2011 2:35 am

by FilmAt11

On my RD-2 crankset the red pre-load collar is attached to the NDS crankarm.
Image

whydobearsxplod
Posts: 159
Joined: Tue May 08, 2012 3:10 am
Location: Santa Barbara

by whydobearsxplod

Sorry, I mistyped. Preload collar should be installed on NDS arm as yours is.

What does your collar say? I can not make it out. "This gap must not...". Mine does not include this warning, whatever it is.

stuka666
Posts: 296
Joined: Fri Apr 29, 2011 3:28 pm
Location: portugal

by stuka666

It should move if you press it with your hand, just check if the crankset is loose or not.

I had to apply loctite to both my K-type cranksets because the large bolts became loose pretty quick.

FilmAt11
Posts: 258
Joined: Sun Jan 09, 2011 2:35 am

by FilmAt11

"This gap must not fully close"

whydobearsxplod
Posts: 159
Joined: Tue May 08, 2012 3:10 am
Location: Santa Barbara

by whydobearsxplod

Stuka666, what should move? The preload collar?

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