08 sid world cup not extending fully ?

[Weight Weenie]

HI guys

Got this fork new a while back and now it is not extending back after riding all the way to 100mm. 

 

Is there something wrong, maybe a service/clean is needed ?

 

I thought it might be the - air being more than 15psi higher than the + air, but I've adjusted the pressure and doesn't seem to help.

 

Any help would be nice !

 

Thanks,

WW. 

[Mecnic]

Have it serviced,

 

The seal between + and - air chamber may be worn causing over charging the negative chamber

 

But ultimately have it serviced by a pro who can figure out what is wrong it is an internal error so fix it before something else actually does break

Mecnic2010-01-21 16:12:59

[Johan Bornman]

Mecnick is right. The problem lies with those seals.

It is a 30 minute job.

 

[Weight Weenie]

Thanks for the info, heck I only got it new in november/december and haven't ridden much. can't think it already needs a service ?

 

How long does such a seal last ?

I guess that it would not be covered under the warranty ?

 

Thanks, WW.

 

[Mecnic]

Most likely under warranty, if it is only 3 months old as you say, sometimes it may have been damaged at the factory or may have just been a dud

 

Have your local bike shop contact the rock shox ditributor and hear what they have to say

[Weight Weenie]

Eish ok will do so, just sorted out Cape Strom now I have to battle with this shop as well...

[Racer X]

+1 for what Mecnic said.

 

Cape Cycles system is the local Sram distributor. Contact Terry Muller, he's the bloke in charge, well last time I checked anyway. He's sure to sort you out.

 

tmuller@capecycles.co.za

[Weight Weenie]

Sweet, will do. Thanks Racer.

[Johan Bornman]

Thanks for the info' date=' heck I only got it new in november/december and haven't ridden much. can't think it already needs a service ?

 

How long does such a seal last ?

I guess that it would not be covered under the warranty ?

 

Thanks, WW.

 

[/quote']

How long does a seal last?

 

It is difficult to say but understanding what type of seals are inside forks, helps to understand the problem.

 

On Rox fork, the external seal you see is a wiper seal. It fails from wear, by griding down as it moves up and down a dirty stancion. It also fails from perishing, I suspect due to UV exposure.

 

All internal seals on Rox's are O-rings. These usually fail from hardening through a combination of time and permament compression. They move up and down very smooth shafts in clean oil and thus don't abrade like wiper seals. However, from the constand compression, they develop flat spots and thus lose their seal.

 

In air forks they have to work hard, sliding up and down on those shafts, but also do so with high air pressure behind them.

 

I suspect your fork's seals are flattened.

 

This doesn't help you though. They are cheap - very cheap parts, but getting to them is a little time-consuming and messy and hence, expensive. If you can get a free seal replacement out of the distributor, do so. If not, bite the bullet and find someone that will replace only the O-rings in the left leg for you.

 

 

[Mecnic]

The man to cantact at Cape Cydles is Ian

[Racer X]

The man to cantact at Cape Cydles is Ian

 

I last contacted them 11 months ago, I dealt with Terry in the past. Does he still work there?

[Johan Bornman]

The man to cantact at Cape Cydles is Ian

 

Why bother? He's in Cape Town and will suggest sending it down there. Get it fixed right here in Gauteng with a same-day turnaround time.

[Weight Weenie]

Anyone you can recommend I take it to Johan in Pretoria ?

Otherwise could you do it ?

[Racer X]

Just a thought but why not have a go at it yourself, RS forks are very simple. Its a very rewarding process. All manuals are available from the Sram site and you can pick up all the parts from your LBS.

[Weight Weenie]

Mmm I think I'll do the course with Johan some time and then try it, I'm not very technically inclined to be honest