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New head for a floor pump(10 posts)

New head for a floor pumpB2
Sep 9, 2003 6:09 AM
I recently installed a Silca presta head on my Blackburn floor pump. Because I use standard length valve stems with Ksyriums, there's not really enough stem sticking out to get a hold of when the tire is completely flat. I've tried cranking up the compression on the rubber washer to no avail. I'm now wishing I stuck with the original pump head. The only problem is that when I cut the original one off, I didn't leave enough hose to reconnect it.

Can any one make a recommendation for a new pump head and a place to buy it?

works for meDougSloan
Sep 9, 2003 6:25 AM
I use Silca heads on all my wheels/tubes nearly every ride, including Ksyriums with normal length valves. When the tire is completely flat, while pushing the head on the valve stem, use your thumb to push the tire/tube/valve out so you get more to grab. This works fine for me every time. Plus, how often do you pump from completly flat?

I'm not sure what I'm doing wrongB2
Sep 9, 2003 12:42 PM
When I push on the tire/tube to get more of the valve stem exposed, I've had problems with the tire not seating correctly on the rim in that area. The result is a VERY loud bang and and shredded tube. If I stop pumping with about 25psi to get the tire seated correctly, I end up letting all the air out trying to get the pump head back on. Whoas me, what a sad state of affairs. I can't even inflate a tire :-0

Eventually I get it, but it's a major pain. Thankfully, as you point out, I don't have to do it very often.

What size tire ??MR_GRUMPY
Sep 9, 2003 1:00 PM
If nothing else works, get some long stem tubes, or valve extenders.
Regular old 700 x 23'sB2
Sep 9, 2003 1:25 PM
I may switch to longer stems. The only thing is that Ksyriums are kind of a tweener as far as rim depth goes. A "long" stem sticks out a long ways - it just doesn't look right if you know what I mean. I've had a difficult time locating stems with a length that is between "regular" and "long".

Regular old 700 x 23'sBeaver
Sep 10, 2003 4:59 AM
Yep, long valve stems don't look right on Ksyriums. I use "regular" valve length tubes and when pumping up my Ksyriums with my Topeak Smart head, I use one of those $1 presta/schrader adapters. Works great.
But you sure ARE doing something wrong!Kerry Irons
Sep 9, 2003 4:57 PM
If the tire is seated properly in the first place, there's no way a gentle push on the back of the valve will cause the tire to unseat and result in a blowout. Mount the tire, push the valve all the way IN while working the tire around it, then work the tire all the way around the rim to be sure the tube is not in the bead seat area. Now, push the valve out so you can get the pump head on it, and pump away. Should be no problem. No way should you have to pump part way, seat the tire, and then pump the rest.
I've never had a problem with a silica headMR_GRUMPY
Sep 9, 2003 7:40 AM
As long as you replace the gasket every year and a half ($1.00), the head won't blow off. I've had mine over 10 years. Finally the piston leather cup wore out ($3.00).
my bad luck with Silcaeflayer2
Sep 9, 2003 6:06 PM
I got so tired of having to hold the pump head with one hand and pump with the other. Old technology is not always the best. Even though I've had a bit of a problem with my Joe Blow Pro, I will take a lever-action pump head every time over old world Silca technology.
That just meant that you needed a $1.00 head gasket....nmMR_GRUMPY
Sep 9, 2003 6:20 PM