Crank Removal Help Requested (Oval 730)
 

I'm trying to remove the crank from my bike; the crank is an Oval 730. I can't find any specs on this online (even the Oval Concepts site), so I'm guessing it's probably rebranded. Anyway, my Park Tool manual was of little help, as I don't what type of crank this is and the brand/model is not mentioned in the book.

I've removed the non-drive-side bolt, but couldn't get the crank arm to come off. Anybody have any ideas on how to remove this crank?


http://i1266.photobucket.com/albums/...psl5x4k9ny.jpg

http://i1266.photobucket.com/albums/...psl6hefvyj.jpg

http://i1266.photobucket.com/albums/...psmy3xqwwk.jpg

The crank bolt looks like it could be meant to be a self extracting type. Did you perhaps remove a ring that filled out the gap between the hex head and the crankarm first?

If it was me, I'd try with a regular crank extractor (for square taper) first. Maybe need to use some sort of washer to get the plunger to engage the BB spindle properly. Or swing by your lbs and ask for a self extracting crank bolt ring.

Or a generic 2-arm gear/bearing puller (any car nut will have one) can be used. Arms hook between crank and BB, plunger engages the BB spindle. Make sure the plunger pushes on the spindle, and not on the ledge inside the crankarm.

Looks like a GXP clone.

I don't see any pin spanner holes around the bolt so that pretty much eliminates a self-extractor and the threaded shank is too big for a normal square taper so I believe this is an ISIS or similar bottom bracket or a variation on the hollow axle HTII format.

Hence this part of my post: "Did you perhaps remove a ring that filled out the gap between the hex head and the crankarm first?"

Bolt looks darn close to this one:Shimano Crank Fixing Bolt & Washer for FC7700 & FC6500

which is missing this guy:
Shimano Crank Arm Cap & Washer for FC7700 & FC6500

No, there was no ring between the hex head and the crankarm; the second picture shown is how it was before I removed the hex bolt.

I called Fuji bikes (I couldn't find contact info for Oval), and they said it's a GXP style crank.

who ever made the GXP that manufacturer may have info. . GoGo inspector Gadget ... google away ..

the hollow tube suggests you remove the left arm then pull the whole right end of the crank and the spindle it is fixed to

out thru the bearings ..

have never seen that combination in the flesh , so since its a hubrid , I suspect the tube spindle is splined on the left end ..

is there a crank arm extractor thread inside the left crankarm to pull it off the splines ? do you have the right extractor tool already?

Id really have to be there to see enough . Try Your LBS?

Okay, so this particular model isn't self-extracting, or it at least doesn't have the ring that would let it extract itself. After removing the 8mm bolt, I just lightly tapped the non-drive side with a mallet and it came off. The drive side just pulled off as well.

Thanks all for your contributions!

Thus reinforcing my motto: "When in doubt use a hammer!"