Losing air when unscrewing shock/dropper pump - time for new pump?

Mikerb said:

no 2

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Mikerb said:

no 2

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sethimus said:

use your brain

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Mr. Breeze said:

I replaced my dropper post with a new OneUp V2 and when I go to unscrew my Syncros SP2.0 pump (which is only a couple years old) all (and I mean ALL) the pressure out of the dropper is lost. I haven't had this issue when filling shocks or even the OEM (Specialized Command Post) dropper.

There shouldn't be any loss when unscrewing (just the air from the pump tube) so is the problem:
1) the Syncros pump nipple has gone bad and time to buy a new pump
2) the valve on the OneUp dropper post is defective

Thanks!
Scott

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Streddaz said:

So, you are definitely using the two step release on the pump? There should be a part that you unscrew first that seals the valve before you unscrew the hose from the valve.
View attachment 140145
Does the valve lose pressure without the pump attached? Maybe it needs a new valve core.

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Mr. Breeze said:

I thought I had been doing the 2 step release process, but I now notice that the release ring had seated itself against the metal barrel so when I was twisting the release ring, the barrel was also unscrewing.
Thank you for your note and calling out the 2-step process. That did the trick!
Thanks again for your help!

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Singletrackmind said:

I use this pump which has a way to Bleed the pressure so you can unscrew the pump from shock/Fork without losing any pressure. Kinda expensive, but to me it's worth it. My riding buddies pump about 5psi extra because they know they will lose some pressure during Disconnect.

Sorry about the A-hole responses from certain members. Hav3 found mist people respectful and helpful on this site.

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