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Zefal pumps that dont get up to 90psi or so...Likely problem? thanks

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1 Answer

Suction pressure goes to 0 and goes back to 90psi


Try posting in the appropriate area and specify the units of measurement.

Aug 28, 2013 | Caterpillar Goulds Pump Itt G&l Series Ssv...

1 Answer

How do you use it?


there is a little switch looking thing that has to be lifted up from the pump then insert the valve into the bike pump and then puch the switch/lever back down and start pumping then to take off lift lever and quickly take pump off valve otherwise you will lose air you just put into tire

Mar 13, 2013 | Zefal Bicycle Duo 821 XLT Frame Pumps

1 Answer

How do you attach zefal z console to bike?


After a call to the customer service people who were more confused than I was, I figured out how to mount the bracket to the handle bar. Believe it or not the Zefal guys did not have an instruction manual on the product they sell. So here is how it works... You have to run the hard plastic strap around the handle bar and push it into a gap between the plastic nut . It's such a small gap that you will have award time finding it. Once you tighten the plastic nut the strap will advance slowly until the end will come appear on the other side. That's all there is to it. Now why the heck could they not put a picture of this on the box? Perhaps job security for the Zefal guys?

Jun 11, 2012 | Zefal Cycling

1 Answer

How to attach zefal z console


Linda, I was having problems with the installation also, but my husband finally figured it out. Just start the end of the strap at the screw, as you tighten the screw with the Allen wrench it will thread the end thru and will get tighter around the post of the bike. It works perfectly and now I can use the GPS on my iPhone to record my rides. Hope this helps!

Jun 11, 2012 | Zefal Cycling

1 Answer

I have 97 gmc 1500 5.0 v8, i took it to a local mechiniac and when he hooked it up to the computer it read out p0305 code, cylinder 5 misfire. changed out the spark plugs, same problem, did a...


While the 90PSI. is low, it will run ok like that. Check to see if it's getting spark from Dist.cap to that plug, it could be a bad igntion wire. If you find everything's good, then these motors with this type injection system have problems with the injection module and have to replace the unit as the nossels aren't seperate.

Mar 21, 2011 | 1997 GMC Sierra

1 Answer

I have a schwinn bicycle pump and i need to know how to use the bike tire part and not the needle part


The needle part for blowing up basketballs and the like simply unscrews from the bike tire part. Depending on the type of tire you have, you might have to get an adapter. If it looks like your car tire stem, it's called a Schraeder valve, and you should be all set. If it is thinner and has a tip that you unscrew, it is called a Presta valve, and you may or may not need an adapter depending on your pump.

Hope this helps.

Jan 21, 2011 | Zefal Bicycle Duo 821 XLT Frame Pumps

1 Answer

I can't get my Zefal pump to seal onto my Pestal tires. The pump head constantly pops off. Do I need to return the pump?


If it is a dedicated presta pump, there should be a threaded cap on the head where it attaches to the valve stem - it has a hole through it to allow the stem through. Tighten that stem slightly and it should compress the rubber enough to hold on. But don't tighten too much or it will be hard to get off.

The head holds on with a rubber donut under that cap. By tightening the cap, the donut gets compressed and closes the hole tighter.

Oct 17, 2010 | Zefal Cycling

1 Answer

I have a Zefal HP frame pump. I'm trying to inflate a tire with a Presta valve. It just won't inflate. It doesn't latch onto the valve and seems to big for the valve body. Is there a diagram available...


Let's hope you didn't force it and snap the plastic point off.

Most Zefal pumps come with a reversible head that can adapt to either Presta or Schreader (like on cars). You unscrew the barrel at the working end of the valve, carefully tap out the rubber cylinder and the plastic internal piece behind it.

Insert the plastic piece in either of two ways. Pointy part Out (for Schrader) or just a round opening Out (for Presta). Rotate the rubber piece correspondingly to show the large opening for Schrader or the smaller opening for Presta and place it inside the valve over the plastic piece. Screw the knurled barrel on tightly.

Aug 12, 2010 | Zefal Bicycle HPX 3 Road Frame Pump

1 Answer

How do I change to presta


If your pump is not double sided (which the one in the picture looks like) the rubber valve can be reversed very easily by unscrewing the outer cap where you usually insert the valve and turning the little rubber valve around before screwing the outer cap back on.

Jun 10, 2010 | Zefal Bicycle Air Profil Road Frame Pump

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