Kona Jack***** adjustment question (not the Primo)
01-28-12, 10:57 AM
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Kona Jack***** adjustment question (not the Primo)
Hello everyone,
After a couple of months of use, my Kona Jack***** pedals (not the Primo model) were spinning with difficulty so I decided to take them apart, lubricate and adjust the endplay of the axle. After taking them apart and cleaning the housing, axle and two sets of 13 ball bearings, I put them together, lubed everything with grease and went on adjusting the end play.
Here's the question: How does one know if the end-play adjusted by the inner 14mm nut is correct? For now, I managed to remove any play in the axle while having the pedals spin freely. Also if you turn the axle you -just barely- feel the ball bearings.
Any help would be greatly appreciated!
After a couple of months of use, my Kona Jack***** pedals (not the Primo model) were spinning with difficulty so I decided to take them apart, lubricate and adjust the endplay of the axle. After taking them apart and cleaning the housing, axle and two sets of 13 ball bearings, I put them together, lubed everything with grease and went on adjusting the end play.
Here's the question: How does one know if the end-play adjusted by the inner 14mm nut is correct? For now, I managed to remove any play in the axle while having the pedals spin freely. Also if you turn the axle you -just barely- feel the ball bearings.
Any help would be greatly appreciated!
01-28-12, 04:26 PM
#2
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If these are the typical design with an adjustable cone the same rules apply as with hubs. You want to remove 100% of the play to maximize the life of the bearing. A slight preload (you feel the bearings, but there's minimal drag) is preferable to a bit of play. OTOH, if you're a heavy masher axle deflection will slightly tighten the bearing so try to fine the loosest zero play position.
When adjusting bearings I always apply what I call the Goldilocks rule. If I'm sure there's play it's too lose, if I'm sure there's no play, it's too tight, if I'm not sure either way, that's just right.
Keep them well greased, and make sure the locknut is tight because otherwise these may have a tendency to tighten and lock up as you ride, or loosen to where they fall apart before you even notice.
When adjusting bearings I always apply what I call the Goldilocks rule. If I'm sure there's play it's too lose, if I'm sure there's no play, it's too tight, if I'm not sure either way, that's just right.
Keep them well greased, and make sure the locknut is tight because otherwise these may have a tendency to tighten and lock up as you ride, or loosen to where they fall apart before you even notice.
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FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
Last edited by FBinNY; 01-28-12 at 04:33 PM.
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