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146 Piston?

Bowthing

By Bowthing
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Bowthing New

Bowthing

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Hi Folks,

 

This is my 146 (finally got it apart!). I think it's from around 1990. I took it apart because the piston was freezing, almost impossible to move without breaking something. I got it all lubed up, and it's working great but the piston leaks; You can see ink smear behind the piston after a few fills. I took it apart again and I can see under the microscope that the piston sealing surface is scored and generally in poor shape.

 

Does anyone know where I can get a new one (piston)?

 

Thanks!

 

p52-content.icloud.com:443&x=1&a=Bh%2BIP

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Bowthing New

Bowthing

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BTW, how do I embed the image in the post?

 

Nevemind, figured it out!

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niksch Donor Pen

niksch

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This is actually a fairly simple and straight forward repair. You don't need to send to MB for a wholesale parts changeover. Here's what I recommend...

 

Heat up a Pyrex-type glass bowl. Apply the seal to slightly enlarge the diameter of the seal. Then, using the smallest grade abrasive (polish) you can find (usually a liquid type), polish out the fissure in the seal causing the leak. The heat the glass again and rotate the seal on the glass to smooth up all the miniscule abrades you made with the polish. Apply heat to enlargen the seal if necessary.

Hard times don't last, but hard people do.

 

Thank a Veteran.

 

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Russ Collectors Item

Russ

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This is actually a fairly simple and straight forward repair. You don't need to send to MB for a wholesale parts changeover. Here's what I recommend...

 

Heat up a Pyrex-type glass bowl. Apply the seal to slightly enlarge the diameter of the seal. Then, using the smallest grade abrasive (polish) you can find (usually a liquid type), polish out the fissure in the seal causing the leak. The heat the glass again and rotate the seal on the glass to smooth up all the miniscule abrades you made with the polish. Apply heat to enlargen the seal if necessary.

Brilliant idea! Wow. I would never have thought of that. Worth a try!

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niksch Donor Pen

niksch

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It's an old method that I whish I could take credit for.

Hard times don't last, but hard people do.

 

Thank a Veteran.

 

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CS388 Antique

CS388

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It's an old method that I whish I could take credit for.

 

Thanks for posting, anyway. Credit due for sharing.

 

I must try this method, next time I've got a suspect seal.

I've never managed to source replacement seals, apart from in donor pens.

 

Thanks.

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niksch Donor Pen

niksch

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My wife calls it engineering. I call it repairing. There are many things that can be done before we send pens back for the infamous LEVEL 1 service.

Hard times don't last, but hard people do.

 

Thank a Veteran.

 

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