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Pumping problem . . .(9 posts)

Pumping problem . . .LAIrish
Oct 16, 2001 10:02 AM
Let's leave the off color comments out of this, guys.

Yesterday, I had a flat. After discharging both the CO2 cartridges I carry with me (that's another story), I was left with my trusty mini-pump. Except that I discovered it won't pump. I ended up having to walk to a gas station. (Which, unusually for this area, actually provided free air. Of course, the compressor only went to 40 lbs. But that was enough to get me home.)

When I insert the tube stem into the pubmp, the pump seals and simply won't pump. (Evidently, the pump is sealing around the tube stem but not depressing the valve which allows the air to flow into the tube.)

The brand of the pump is "Slim Jim." It came with the bike. Any suggestions? (Or should I just buy the Zefal mini-pump Performance Bike has on their clearance table?)
re: Pumping problem . . .Stew
Oct 16, 2001 10:11 AM
I have that problem sometimes. Just try pushing the pump down harder on the stem. With a new tube, give support by pressing up on the tire while you're pushing down with the pump.
I tried that . . .LAIrish
Oct 16, 2001 5:48 PM
In fact, once I got home, I took the loose tube and tried to insert it into the pumps air outlet. With it in as far as it will go, there's still no joy. (D***n, there are just too many Freudian possibilities with this topic.)
a few questions..vanzutas
Oct 16, 2001 10:43 AM
First is this presta or schrader we are talking about.
does the pump have the reversible two piece valve system similar to that of the zefal?
It's a Schrader valve . . .LAIrish
Oct 16, 2001 5:46 PM
The pump has a reversable "mouth"(?) for either Schrader or Presta. (I don't know if its similar to the Zefal, I didn't check that while I was at Performance Bike.) There is a screw on cap which covers the air outlet, unscrewing it allows you to remove the internal workings and turn them around to fit a Presta valve. I made sure the workings are arranged for the Schrader.
did you tryRusty McNasty
Oct 16, 2001 11:56 AM
turning the little "shrader valve finger" over? If you were using a presta valve, nothing is needed to depress the valve, it open by pressure. That's why real bikes use presta valves, and department store bikes use shrader valves.
Yea, I tried that . . .LAIrish
Oct 16, 2001 5:50 PM
even though it didn't make any sense to reverse the pump's workings in ways in which the "little valve finger" wouldn't point towards the tube, I tried every combination of components I could. Nothing worked.
I'm talking aboutRusty McNasty
Oct 17, 2001 4:31 AM
The little "finger" that presses the valve in your tube, you bonehead! Not the internal workings!
Take the rubber gasket on the chuck off, and turn the little plastic thing around.
re: Pumping problem . . .cioccman
Oct 16, 2001 1:02 PM
Well, I suggest not carrying expended cartridges! Secondly, just carry an extra one, maybe 3? I carry a patch kit, a tube and two cartridges. Never been left in a problem. I'd rather jam two tubes and 5 cartridges in my pack than buy a pump. Just my opinion. Cartridges are quick, easy and cheap.