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Dual valve floor pump, only one valve works.

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Dual valve floor pump, only one valve works.

Old 10-25-09, 10:33 AM
  #1  
pnj
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Dual valve floor pump, only one valve works.

I have a Serfas floor pump I purchased a few years back from a LBS. It's never been abused, always been in my house, well take care of. At the time I purchased it, I only had one type of valve on my bikes.

I recently got a new bike, and this one has the other valve type. My pump worked wonderfully when I put new tires on the bike. However, now when I try to pump the tires on my older bike, the pump will not work.

It's a duel head pump. the head has no adjustments, nor can it be taken apart. I think the valve or whatever that is inside the pump head is stuck/sticky. Could I squirt some type of lube inside to try to free it up some?

or is there something else you can suggest?
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Old 10-25-09, 12:48 PM
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And what type of valve are you trying to pump up...? Presta valves need to have a little bit of air released before they will pump up usually.
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Old 10-25-09, 12:50 PM
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Presta works fine. it's the Shreader (sp?) that won't pump.
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Old 10-25-09, 12:58 PM
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Originally Posted by pnj View Post
Presta works fine. it's the Shreader (sp?) that won't pump.
Have you tried pumping up a different schraeder valve? If you think it's defective i'd just go and exchange it.
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Old 10-25-09, 12:59 PM
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i have tried many different tubes with both valves. only the presta works.

I can't exchange it as the shop is no longer around.
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Old 10-25-09, 01:36 PM
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I've seen the same thing happen with Blackburn floor-pumps. Usually their Presta-side of the dual-chuck won't work. Solution: Get a new chuck. Or spring for a new & better floor-pump.
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Old 10-25-09, 01:38 PM
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so...

I think i'll shove some oil of some sort in there an see what happens.
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Old 10-25-09, 08:38 PM
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Originally Posted by pnj View Post
so...

I think i'll shove some oil of some sort in there an see what happens.
Don't use oil, it will end up inside your tubes. Try a little silicone spray.

You can cut the chuck head off and clamp on a new one.
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Old 10-25-09, 08:39 PM
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I'm fed up with mine as well. It works when it feels like it. It doesn't matter which valve I am using, it will let air out of the other only.
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Originally Posted by rjones28 View Post
Are they talking about spectators feeding the cyclists? You know, like don't feed the bears?
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Old 10-25-09, 08:40 PM
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used WD-40. didn't help...

what do you mean, "cut the chuck head off.." ?
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Old 10-25-09, 08:49 PM
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On my pump I sometimes need to put my thumb over the valve I want to switch to and give it a couple hard pumps to get it to switch.
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Old 10-25-09, 08:52 PM
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tried that. still no worky...

I tried to take a tube I filled with another pump and see if I could put that on my broken pump, to try and push some air backwards through the pump head. Next, I'll try to smash the thing into the ground or with a hammer. surely it can't hurt it...
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Old 10-25-09, 09:02 PM
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Originally Posted by pnj View Post
used WD-40. didn't help...

what do you mean, "cut the chuck head off.." ?
I mean buy a new chuck head of you choice, take a knife and cut the old one off. Use a very small hose clamp to clamp the old hose to the new head. Or you can probably buy a chuck head with new hose and clamp the whole assembly to the pump. I'm assuming you have a floor pump.
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Old 10-25-09, 11:58 PM
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serfas

email Serfas, and ask them what you should do?
maybe they will send you a free replacement.

http://www.serfas.com/warranty.asp
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