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Old 02-26-06, 04:00 PM   #1
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Planet Bike pump - dual head problem

Anybody have any advice on getting the dual head of a Planet Bike ST floor pump to work? I have used the pump for over a year to fill presta tubes - no problems.

Today I need to fill a shraeder valve and although the shraeder valve stem fits into the second hole on the dual head OK, there is no air coming through the head into the stem valve. As one pumps away, you can feel and hear the air coming out of the presta side. Used pumps with dual heads before and usually there is some type of lever to turn to direct the air. No such lever on this pump. The only lever is the one you turn up to lock the head onto the valve. Only seems to be one position for the lever, up or down.

Any ideas?

Thanks up front.
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Old 04-29-13, 11:45 PM   #2
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An old post, but I thought it worthy to reply.

All I can say is that I have had never ending problems with the Planet Bike floor pump that I own. I have had it for a few years and share the use of it with my partner. I use the schrader hole, my partner uses the presta hole. The head unit internal rubber wears quickly and loose bits of rubber form. I purchased my pump at a local bike store and they have kindly replaced the head a few times for me. The problem seems to be the internal valve in the head. It requires back pressure from the tube. My experience has been that if the tube is flat, then the valve does not switch over at all, or very well. It seems to be a design flaw, and more annoying for me, is that it seems to 'stick' on the presta side, meaning I can't pump my schrader tubes if they are flat.
I have had to resort to pumping the schrader tube with a small hand pump to build a bit of internal pressure, then transfer it to the Planet Bike Floor Pump. I have found that sometimes this new pressure helps the valve to switch over in the head, sometimes not. I am planning to either throw out my planet bike pump, or put a proper head on it that can be interchanged to either a single schrader head OR a presta head, not both. I think the designers of the dual head have tried to achieve too much with it, and did not seem to test out its limitations. The dual head is a bit flawed in my view and experience.
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Old 04-30-13, 09:00 AM   #3
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I have a Joe Blow pump that is very similar but has not had any issues. Pumps both types reliably. Also the gauge needle on it has not fallen off the next day like the PB one I originally had and took back to the store for a refund.
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Old 04-30-13, 10:37 AM   #4
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My Park PFP-4 came with a dual Presta/Schrader head with the two holes adjacent. When it exhibited the same problem the OP reports (air coming out of the wrong side) I took it apart and found there is a small rubber ball located between the openings that acts as a check valve and moves to seal if non-used one. Mine had gotten dirty and wouldn't move freely so cleaning the head's interior solved the problem.

I agree with roadriderwa's assertion that dual use heads do neither job well.
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Old 04-30-13, 11:16 AM   #5
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Originally Posted by HillRider View Post
I agree with roadriderwa's assertion that dual use heads do neither job well.
Likewise not a fan of dual head pumps, the worst (IMO) being Topeak's "smart (dumb) head". As we say in the tool trade "fit's all, strips all".

OTOH, the single most common problem, and likely the OPs is a stuck diverter valve. These need to be clean and lubed to work well, and usually respond OK to field strip and service.

Personally, I use only push-on (no thumblock) PV heads, and have an SV to PV adapter made from the end of an old pump hose.
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