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Old 07-04-07, 04:32 AM   #1
thaduke
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Meidai Top Super Pump Parts

I have a beautiful Meidai Top Super floor pump with chrome barrel and I need the leather washer
for the inside. I have no Idea where to find one. Any info would be helpful. This pump is like new
condition but no longer useful without the washer.
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Old 07-04-07, 06:40 AM   #2
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I just checked Loose Screws and Bike tools Etc and neither has parts for the Meidai pump (also sold under the Cyclepro brand name and possibly others). These pumps have been out of production for years and parts are getting real hard to find. Mine is over 20 years old and is on only it's second washer but when that goes, I'm probably out of luck.

Try all the older LBS's you can locate and see if one of them has the washers in their NOS supplies.

Also, you may be able to salvage the current washer by lubing it with silicone grease to get it to seal if it's not too far gone.
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Old 07-04-07, 07:13 AM   #3
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Would Silca parts fit?
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Old 07-04-07, 08:53 AM   #4
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I've always used the same squirt can of motor oil on my Top Super's plunger that I use for my old Coleman stove and lantern pumps. They all have leather plungers and the oil seems to make them swell. I don't know if motor oil is the the best thing to use, but I've had them all since the '70s.
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Old 07-04-07, 08:58 AM   #5
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Quote:
Originally Posted by tellyho
Would Silca parts fit?
Do you happen to know the i.d. of the barrel on a Silca pump?
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Old 07-04-07, 09:02 AM   #6
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Silca parts don't seem to fit. I've had the same Medai pump for 35 years, but I'm going to toss it out because I can't find a washer.

em
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Old 07-04-07, 09:44 AM   #7
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I had one until last year and searched everywhere for the leather washer, to no avail.

I actually kept mine around for 2 years in the hope that I would find spare parts for it. I tried cutting a piece of thick leather, but the original looks like it was formed piece with a "cup" or "funnel" design.

I ended up throwing it out and purchasing a new pump. Sad, because it was such a nice pump. Good Luck.
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Old 07-04-07, 11:25 AM   #8
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Silca parts won't fit. I just measured the OD of both my Meidai Top and my Silca Pista and the Silca barrel is significantly smaller in diameter. We are all out of luck when the current parts wear out.
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Old 07-04-07, 12:54 PM   #9
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That sucks! I love that pump.
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Old 07-04-07, 01:21 PM   #10
thaduke
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It is a classy pump indeed, hate to toss it.
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Old 07-04-07, 01:28 PM   #11
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Have you called around to some hydraulics type places? they probably don't have what you need, but they may have a good idea of who to call. Also, how about a cobbler? At tis point you'v got nothing to loose.

Sheldon
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Old 06-10-08, 05:41 PM   #12
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This guys have a o-ring replacement for the medai pump leather washer.

http://www.yellowjersey.org/pumpbits.html
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Old 06-11-08, 07:54 AM   #13
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Mine still works like new after 35 years! I was just looking for a spare just in case.

I have to admit that it doesn't get much use since I bought a compressor.
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Old 06-11-08, 11:12 AM   #14
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Not sure if this Pyramid pump is the same as the Medai, but it looks like the Medai pump.

Pyramid pump

Last edited by mtblurkr; 06-11-08 at 02:06 PM.
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Old 06-11-08, 01:19 PM   #15
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Quote:
Originally Posted by mtblurkr View Post
Not sure if this is the Pyramid pump is the same as the Medai, but it looks like the Medai pump.

Pyramid pump
I think you're right. It looks just like it to me. Now to find parts for Pyramid pumps.

This thread is a year old, but that's okay. We're getting somewhere.
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Old 06-11-08, 02:54 PM   #16
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Quote:
Originally Posted by A.Winthrop View Post
Hi,
.
PPS - I found my own BF thread appealing for help to fix
my pump. It includes a more accurate description of how I
fixed mine and other information on these pumps as well.
.
Here's the BF link:
.
http://www.bikeforums.net/showthread...169&highlight=
.
Thanks A.Winthrop. I replaced my leather washer with the O-ring upgrade from yellowjersey.org. It works good now.
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Old 07-27-12, 04:11 PM   #17
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(I apologize for reviving this old thread. I'd like to document this here in case someone needs to replace the leather washer/cup as I did.)

I stumbled upon a MDI pump in good shape. The leather washer/cup still works but will need to be replaced soon. I was successful in using the following procedure to make a new one. Total time was less than an hour:

- Material: 2-3 mm thick leather. I used an old straight razor strop. I believe an old belt or shoe may also work

- Cut the leather into a round disk; 8mm wider than the piston inner diameter. Use scissors to cut the disk and a box cutter or razor to cut the center hole

- Soak the leather disk in hot water (from tap, not boiling) for 5-10 min

- Disassemble the pump. Remove the original leather cup

- Using hands, fingers, and whatever tools you may have on hand, shape the leather disk into a cup. This may take about 10 min. Re-soak the leather if necessary. The rough side of leather is the cupped side (down when installed)

- Install the new cup on the pump rod with the original two metal washers and nut

- At this point, the new cup's diameter will be about 3mm too large. Use a hose clamp to form/compress the leather cup to the correct size

- Remove the hose clamp. Coat the leather cup with grease (I used white lithium grease)

- Assemble the pump. Pump may not work initially. Wait a few hours for the leather cup expand to its final shape forming a proper seal. Also apply more grease if needed
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Old 07-27-12, 04:14 PM   #18
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Quote:
Originally Posted by thaduke View Post
I have a beautiful Meidai Top Super floor pump with chrome barrel and I need the leather washer
for the inside. I have no Idea where to find one. Any info would be helpful. This pump is like new
condition but no longer useful without the washer.
Open it up and accurately measure the bore of the cylinder. Odds are that it'll be the same as some other currently produced pump, so you can use that piston.
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Old 07-27-12, 11:59 PM   #19
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Keeping Grease on the leather cup, air seals it well .. but I know the wear life is not infinite.

The same company in Wisconsin that makes the selle anatomica saddles
was a specialist in leather pump cups and shaft packing seals,for decades .

http://www.monarch-mclaren.com/

To order, take your pump & Measure the dimensions, they request,
they make a vast number of sizes.

Last edited by fietsbob; 07-30-12 at 08:42 AM.
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Old 11-30-12, 06:26 PM   #20
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info bump...

Quote:
Originally Posted by fietsbob View Post

The same company in Wisconsin that makes the selle anatomica saddles
was a specialist in leather pump cups and shaft packing seals,for decades .

http://www.monarch-mclaren.com/

To order, take your pump & Measure the dimensions, they request,
they make a vast number of sizes.
$5.50 per cup, $50 set-up fee and $5.95 handling fee. shipping...?
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Old 12-01-12, 02:23 AM   #21
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So they don't have anything close, in inventory? prices go down for 100? you might have a replacement parts exclusive .

might go DIY, circle of leather, soak it wet, force it in a shape you need, let it dry..
then grease it before use?
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Old 12-01-12, 08:23 AM   #22
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All of these custom leather cups should be moot if you are willing to spend $20 for the O-ring replacement offered by Yellow Jersey. The link is in posting #12 above.
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Old 12-01-12, 05:00 PM   #23
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Meidai

Quote:
Originally Posted by HillRider View Post
All of these custom leather cups should be moot if you are willing to spend $20 for the O-ring replacement offered by Yellow Jersey.
The link is in posting #12 above.
yes, they sent me a picture of the o-ring kit.
Quote:
Originally Posted by fietsbob View Post
So they don't have anything close, in inventory?
prices go down for 100?
you might have a replacement parts exclusive .
no.
yes, 50,100,200 break points.
somebody else(business)can do that.
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Old 05-23-15, 11:01 AM   #24
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Yellow Jersey No Longer Carries Meidai Leather Cups

Quote:
Originally Posted by HillRider View Post
All of these custom leather cups should be moot if you are willing to spend $20 for the O-ring replacement offered by Yellow Jersey. The link is in posting #12 above.

Yeah, that.
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Old 05-23-15, 01:23 PM   #25
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I put some boot grease on the original leather pump cup, occasionally, and it keeps working , for 30 years, now..

amazing what a bargain, a little maintenance is , in the long run..
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