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Need help troubleshooting/fixing front hub noise

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Need help troubleshooting/fixing front hub noise

Old 09-23-08, 08:35 AM
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William53
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Need help troubleshooting/fixing front hub noise

I have 2008 Diamondback Kalamar Ė I know, Iím cheap Ė with about 3 months and 450 miles on it. The last couple of weeks Iíve noticed an intermittent fat-toned squeak, almost a honk, coming from the front wheel hub when a) Iím walking the bike and, more and more, when riding. Itís not so regular that youíd think itís absolutely timed to each rotation of the wheel. Itís a quick-release wheel.

Iím a total novice at this. Can anyone suggest what might be causing the problem and how I can solve it? Even just ideas for where to lubricate with what lubricant.

Here are wheel and frame/fork specs:

~ Hubs Alloy QR
~ Rims R-1000, 32-hole
~ Tires 700 x 40c Kenda Cross
~ Frame Construction TIG-welded
~ Frame Tubing Material 6061-T6 aluminum
~ Fork Brand & Model Hi-Ten Remington
~ Fork Material Steel, unicrown crown

Thanks.
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Old 09-23-08, 09:41 AM
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CACycling
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Are you sure it isn't brake pad rubbing? Sounds more likely than that kind of sound coming from the hub.
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Old 09-23-08, 09:53 AM
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If it isn't a brake-pad rubbing (adjust same if so) - then check the hub. Take the front wheel off the bike and spin it while holding it by the QR on each side. Is their any tightness? Sounds? I suggest you check, or your LBS, for it being on too tight. Try backing-off the QR a bit. Re-install wheel. Still making a squeak? Overhaul the hub (or the LBS). If it's 3 months old, it should be under warranty.
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Old 09-23-08, 09:57 AM
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William53
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Thanks for your suggestions!!
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Old 09-24-08, 09:55 AM
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Oke, it was the brake pads rubbing. Thanks so much for the input!

Itís not rubbing anymore, but Iím struggling to stabilize the adjustment I made to the linear-pull brakes. I loosened the anchor bolt and backed the cable up a little bit to give more space between the pads and the rim. Then I messed around with those little centering screws to get the spacing even on both sides. But now the whole assembly feels a little loose, at least it seems looser than when I started. Is this normal? Any suggestions as to proper way go about centering and stabilizing? The bike owners guide is useless.
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Old 09-24-08, 10:12 AM
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Originally Posted by William53 View Post
Oke, it was the brake pads rubbing. Thanks so much for the input!

Itís not rubbing anymore, but Iím struggling to stabilize the adjustment I made to the linear-pull brakes. I loosened the anchor bolt and backed the cable up a little bit to give more space between the pads and the rim. Then I messed around with those little centering screws to get the spacing even on both sides. But now the whole assembly feels a little loose, at least it seems looser than when I started. Is this normal? Any suggestions as to proper way go about centering and stabilizing? The bike owners guide is useless.
Remember when you loosened off the anchor bolt and backed out the cable a little bit? Well that was loosening the brakes. THe arms are spring loaded and feel stiffer the closer they are to the rim. If the brakes go in when you squeeze the lever and come back out on the own when you release the lever then they are working properly.

The trick to using the centreing screws is to use one at a time - there is not some magical set point that is 'correct' so if you adjust one side and not touch the other that is fine. It is probably the most simple adjustment on your whole bike - tightening the screw (screwing it IN) pulls the arm back away from the rim. Looseing the screw (screwing it OUT) allws the arm to go a little closer. If the left side pad is hitting the rim, tighten the left side centreing screw a little.

Two important points to remember when adjusting your brakes:
1. Make sure your wheel is completely in the frame or fork dropouts before starting. Proper brake alignment depends entirely on proper wheel alignment.
2. After each adjustment, make sure all bolts are tight and squeeze the brakes lightly a few times and release to allow the brakes to find their own centre and to check for any sticking or contact with the tire.
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Old 09-24-08, 12:12 PM
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Thanks, that's very helpful. I'll try to get it right this evening.
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