Pump head and hose?

On Saturday, March 27, 2021 at 10:08:31 PM UTC-4, Radey Shouman wrote:
N8N writes:

On Saturday, March 27, 2021 at 4:45:00 PM UTC-4, AMuzi wrote:
On 3/27/2021 3:34 PM, N8N wrote:
On Thursday, March 25, 2021 at 8:53:20 AM UTC-4, AMuzi wrote:
On 3/25/2021 1:04 AM, wrote:
On Wednesday, March 24, 2021 at 9:30:21 PM UTC-5, wrote:
On Tuesday, March 23, 2021 at 10:14:09 PM UTC-4, Frank Krygowski wrote:
On 3/23/2021 7:53 PM, wrote:
https://www.biketiresdirect.com/prod...UaAsCkEALw_wcB

The best pump hose/head available. Topeak. Both presta and
schrader. I have it on my Silca pump body in the garage. I
attached it using a small hose clamp.
Funny thing. I have that same hose and pump head, attached to an old
Nashbar floor pump. Today I tried to use it to inflate the Schrader
valves on my wife's folding bike. No dice; I think it failed to depress
the Schrader valve pin.

This has has happened before, but in the past just shaking the head
(which yielded a slight internal rattle) seemed to fix it. Not today. I
gave up and pumped using a Zefal HPX, and put the floor pump on my work
table to inspect tomorrow.
Followup: In my Topeak pump head, there's a slotted plunger that depresses the
schrader valve's pin. It's essentially a tube, open at the back, almost closed off at the
end that contacts the Schrader pin. There's a tiny helical
spring that sits in the back of that
tube, about 4mm diameter, maybe 15mm long, wire diameter about 0.2mm. It's roughly the
size of the spring in a retractable ball point pen.

Well, it was corroded and broken. I was able to find a similar spring, maybe a bit stiffer.
The pump head now works.

- Frank Krygowski

My experience in fixing stuff is limited. Other than fixing
construction, electrical wiring, plumbing in houses. But is
there a place you can find different sizes of little tiny
springs? I might, maybe, possibly be able to diagnose a problem
with a spring if I took a pump head apart. But I would have no
idea how to find a replacement part. Other than from the
manufacturer, and I doubt they sell small parts like that.

Here we just scavenge and sort that kind of thing- springs,
nylon screws, circlips, aerosol caps, electric motor
brushes, oilite sleeves etc - into drawers of a regular
plastic parts rack. Not so much for actual bicycles as the
everything else set of building, truck, shop equipment and
so on. Miniature screws and nuts (2mm and under0 are in a
plastic snap-top container, sheet metal screws and wood
screws, clamps and braces on and on. I agree that buying one
such for a right-now problem would be expensive and frustrating.

I also keep a steel drawer of 'nice but broken' where
material like file and wrench steel, hardened shafts and so
on provide raw material for various projects.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

Man I could use a drawer like that right about now! The head and
hose that I ordered just showed up an hour or so ago, and there's
no way to fit the hose to the pump. The attachment looks like it
would work, but it won't.

Found this page

https://www.blackburndesign.com/spare-parts/

looks like what I need is a #8023442 to either mix and match parts
with what I already have, or just use a Blackburn pump head. The
$4 list price made me really happy too. UNFORTUNATELY it appears
to be discontinued, as I can't find any retailers that actually
have it in stock, although I'll call the 1-800 number on that page
on Monday to see if they happen to have a few left.

I guess this wasn't such a good deal after all, should have just
bought a new Park or Joe Blow (OK, so there's a question there,
anyone have an opinion?) and been done with it :/ this is what I
get for trying to be cheap. OTOH, I did find a nice Luxman
tuner/preamp for $20 once, at the same store even, that turns out
sold for about $2000 new back in 1980. I did have to put about
$200 into it (really needs a couple device specific accessories to
work correctly) and some time fixing it (one op-amp had failed, I
want to say at the input to the Tape 1 In?) and figuring out the
remote codes (because you also can't use it really without the
remote), but it's a cool thing to have, and that's what keeps me
looking...

Nate

The versatile Topeak sets include an assortment of threaded
end pieces to fit many pumps bases but also a stainless hose
clamp for all the rest:
http://www.yellowjersey.org/photosfr...t/topktwin.jpg

You might try that, reusing the original threaded barb in
your pump base and a hose clamp over that with your new hose.
--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

I ordered the Smarthead mentioned earlier in this thread

https://www.amazon.com/Topeak-Floor-.../dp/B06XB1B29N

and it only came with the hardware shown in the picture. The hose
fitting stuff was installed on the hose and the Dunlop adapter was the
only loose part included. Seems like a step in the wrong direction

There is no threaded barb to reuse, the original hose for this pump
must have looked very much like the Topeak attachment, but different.
Obsolescence through incompatibility I guess. or TANSTAAFL...
Sorry to hear that. I have to admit I didn't actually order from
Amazon, I ordered from these guys:

https://www.modernbike.com/topeak-tw...-hose-adapters

I can't remember what came with it, except that it fit in easily in
place of an existing Joe Blow pump head.

well Joe Blow is a Topeak brand, that's why... and I do not blame you in any way, I was just taking a flyer that I'd get this fixed for cheap.

Unfortunately, a few days after I asked, I got a reply from Blackburn (actually Bell+Giro, guess they've been assimilated) and I did guess right on the hose I needed ($4!) but sadly it is discontinued and they don't have any old stock to sell me. The $25 "Airtower Shop Floor Pump Replacement Hose 8023441" apparently has a different fitting on the pump end. So, if someone near DC-land has a drawer with the bits and bobs for this, let me know now before trash day

Ya win some ya lose some...

I guess I'll just keep using my housemate's pump until I **** him off (he's pretty easygoing though) and then I'll buy a Joe Blow unless someone has a better suggestion.

nate