cmbicycles |
05-16-2018 09:13 AM |
Quote:
Originally Posted by Rpoole8537
(Post 2364788)
My GF found a cream puff Cannondale F400 at a garage sale. It appears that it was ridden around the block a few times and stored in the garage for 15 years. It has the headshok P-Bone M shock. It feels as if it needs servicing, but it appears to require a Cannondale specialist. She really doesn't need a shock, so I'd like to lock it out by turning the dial on top of the stem. I can turn it, but three quarter turns appeared to make no difference in stiffness at all. How many turns can one turn it. I don't want to damage the shock before I get a chance to have it serviced, and I will get it serviced just to ensure that it is damaged. Ideas/Suggestions???
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Post a picture, I don't think the above video applies to the fork you mentioned as yours doesn't have an external rebound, nor use a shimano tool to take apart. Some entry level head shocks used an oil damper and an elastomer/spring, which should be what you have. You tightened the pre load on the spring by taking off the bolt for the lockout knob, it's a small Allen key down inside the shaft. The only issue is if the fluid has leaked out it won't lockout with the knob. Some forks just had the spring/elastomer w/o lockout, and a plastic cap on top instead of a lockout knob. Pictures should make it more obvious how to advise.
If it has a lockout, the knob only turns part way before it hits a stop, so if you get 3/4 of a turn and nothing happens it is probably the cartridge that needs serviced, and you will need the correct castle tool to take it out. If the oil damper has lost its fluid it can't lockout the fork as it works by closing a valve inside the cartridge to prevent oil from moving from one side of the cartridge to the other and it can't work without the oil level correct. It's not a big deal to fix, once you get the cartridge out, likely just needs a seal kit and one or two special tools to take the cartridge out.
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