Triumphrat

pigboy306 · 10-04-2009, 06:05 PM

Hi i have taken the front forks to bits and fitted new seals and put in oil. When i compress each, one doesn't make any noise and the other like it is sucking up something... a sort of a woosh noise. Anyway think something might be amiss what could it be?

phpbiker · 10-05-2009, 12:59 PM

I think you may want to re-type that, just to be sure...

But if I get you correctly...

The damping action is caused by a vacuum drawing through the fork oil, unless I am mistaken, with good seals and fresh oil that should make a wooshing sound on both legs.

pigboy306 · 10-05-2009, 01:31 PM

So the silent one is the one to look at then, what could it be then? I put on new seals on the forks, what else could /should i replace?

I think you did get me right though!

sailfish · 10-05-2009, 01:54 PM

There is a white sealing ring on the damper tube, the piston if you will, that is the barrier between the pressure and non-pressure of the oil flow. I would think that it would have to be missing for there to be no resistance (the lack of the woosh noise). A heavily worn or broken one might have the same result. Let us know what you find.

pigboy306 · 10-05-2009, 04:53 PM

Thanks for your reply this at gives me a starting point. I have looked at the schematic which part do you think is missing/worn?

http://www.bikebandit.com/triumph-mo...17527sch560127

faffi · 10-06-2009, 03:35 AM

You need to pump the fork repeatedly to get the air out. As long as there is air in the system, it will make noise. If you have a rod inside (adjustable damping) that is bolted to the top adjuster, you need to get that rod up and pump it as well before you can get all the air out.

Failing to get out all the air also makes the level reading wrong (it will be too high compared to what it actually is once settled)

I just replaced the seal and oil on one of my fork legs yesterday, and didn't react on any particular sound once the air was out.

pigboy306 · 10-06-2009, 03:49 AM

thanks for the reply faffi. So the forks nshould be silent, ok in that case i will take the noisy one to bits. The forks on my bandit are quiet so that makes sense to me also!

The Daytona forks have an adgustable damper. So i will take the top of spring out and pump fork and damper until no noise then top up and cap on?

faffi · 10-06-2009, 06:04 AM

Yes, you need to take them apart and move the damper rod several times in order to get the air out. You don't need to separate the forks as such, just take off the top adjuster and separate it from the rod so that you are free to move it though (most of) its stroke.

pigboy306 · 10-06-2009, 01:53 PM

roger wilko will do sounds quite a 'quick job' so i will give it a go later or this week some time... sick children permitting.

pigboy306 · 10-10-2009, 06:10 PM

Ok i think i did a cock up when doing the forks, i didnt tighten damper bolt before filling with oil.
the haynes manual says to compress the fork and then tighten the bolt to 40nm.

Do i need to empty the oil to tighten.

I have tried to tighten the bolt by turning over and compressing the fork but am not managing to tighten it seems to keep turning.

The forks are from a 1991 Daytona and the bolt i am talking about is the one at the base of the fork which is done up externally.