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#1
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Leather Washers for Old Floor Pumps
I've got a trusty old Medai/CyclePro floor pump that is losing
compression. I've greased the washer over the years but it feels like time for a replacement. My LBS's don't have anything close in size. Any sources? Or instructions on making the cup shaped washers? - Mark |
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#2
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Leather Washers for Old Floor Pumps
On Sun, 17 Jul 2005 21:43:44 -0400, Mark Shefrin
wrote: I've got a trusty old Medai/CyclePro floor pump that is losing compression. I've greased the washer over the years but it feels like time for a replacement. My LBS's don't have anything close in size. Any sources? Or instructions on making the cup shaped washers? Try a hydraulic cylinder repair shop. They can usually get them, if it's not an exotic size. They'll need to know the dimensions involved. There's a source in the UK that might be a better bet than trying to make one: http://www.base-camp.co.uk/Cups%20.htm In the US: http://www.fortworthgasket.com/Leather%20Spec.htm is in Texas, but they may have an impractical minimum order. Ditto for http://www.northamericanseal.com If it's a common size, I could probably find it in 15 minutes on the phone here in Houston; we've got lots of hydraulic cylinder shops in this city. To make a leather cup using one method I've seen employed, you need a tapered cylinder whose exit is of slightly smaller ID than the cylinder into which the cup will eventually be fitted, and a ram with an end diameter of the same size at the piston washer in the pump. The leather disc is cut, the edges are tapered slightly, the leather is saturated with lanolin, mounted on the end of the ram, and heated to about 180F (or higher). The ram is then pushed through the taper (with the disc forming itself around the end of the ram in the process) and allowed to cool with the cup sitting in the small end. After cooling, the ram is pushed out and the cup is removed pretty much ready to install. Tou *might* get away with forming the cup in place in the pump, but it's going to depend more on luck than anything else; if even marginally successful, it'll probably drag like crazy until it wears into shape, and it won't last as long as one that was the right shape before it was installed. -- Typoes are a feature, not a bug. Some gardening required to reply via email. Words processed in a facility that contains nuts. |
#3
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Leather Washers for Old Floor Pumps
Mark Shefrin wrote:
I've got a trusty old Medai/CyclePro floor pump that is losing compression. I've greased the washer over the years but it feels like time for a replacement. My LBS's don't have anything close in size. Any sources? Or instructions on making the cup shaped washers? We have 'em http://www.yellowjersey.org/pumpbits.html As will most competent LBS. That model was sold under dozens of brand names for 30 years. -- Andrew Muzi www.yellowjersey.org Open every day since 1 April, 1971 |
#4
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Leather Washers for Old Floor Pumps
On Sun, 17 Jul 2005 21:43:44 -0400 Mark Shefrin
wrote: I've got a trusty old Medai/CyclePro floor pump that is losing compression. I've greased the washer over the years but it feels like time for a replacement. My LBS's don't have anything close in size. Any sources? Or instructions on making the cup shaped washers? Check your local hardware store. Mine carries pump washers (useful for many kinds of pumps) in a number of sizes. You might get lucky. - ----------------------------------------------- Jim Adney Madison, WI 53711 USA ----------------------------------------------- |
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Leather Washers for Old Floor Pumps
On 2005-07-17 23:59:03 -0400, A Muzi said:
Mark Shefrin wrote: I've got a trusty old Medai/CyclePro floor pump that is losing compression. I've greased the washer over the years but it feels like time for a replacement. My LBS's don't have anything close in size. Any sources? Or instructions on making the cup shaped washers? We have 'em http://www.yellowjersey.org/pumpbits.html As will most competent LBS. That model was sold under dozens of brand names for 30 years. Thanks. You guys are incredible. |
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