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Mb149 Piston Spindle Replacement



viju

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Custom Pen Parts

Hi again

It has been a while since I used this thread but I think I am ready to give a bit more info on the dreaded C ring removal tool I sell.

I have been waiting for the results of testing the tool, but I am pleased to say that my pal Fountainbel has given it a try and it seemed it passed with flying colours. I include the relevant text from his results.

I now intend to sell the said tool with a stainless tube to re-insert the ring and a Peek or Acetal helix as a pack, but eack item will be sold seperately as well.

I also have attached a photo demonstrating the technique to be used (using a 3mm rod and an O ring). As you see my tool inserts into the gap in the ring, by wrapping around the broken helix to access it. Not by poking down the side!

They will be available very soon.

 

Test results

Ive just tried it on 2 MB 149 fillers, with succes !

 

I initially had troubles on the first one, kind of learning curve.

 

But once I pivoted the hook properly under the C ring it jumped out easily.

 

The C ring on the second filler went out after the first attempt , great tool , congratulations !

20200325_193412.jpg

20200325_193215.jpg

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  • 3 weeks later...
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fountainbel

Hi all,

This is effectively an excellent tool to get the C ring out !

Although I initially had my doubts, my tests completely convinced me.

Well done Roger !

Francis

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  • 3 months later...

 

I would like to add that the C-ring is used on newer models only. The very early resin 149s with the friction fit filler do not use a C-ring to secure the spindle but a little metal socket which pushes into place.

 

Thanks Michael, this was incredibly helpful when I did a resin recently. The little can thing is a bit of a bear to remove- lots of surface area to create friction!

 

Ralf

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I would like to add that the C-ring is used on newer models only. The very early resin 149s with the friction fit filler do not use a C-ring to secure the spindle but a little metal socket which pushes into place.

 

Thanks Michael, this was incredibly helpful when I did a resin recently. The little can thing is a bit of a bear to remove- lots of surface area to create friction!

 

Ralf

the latest models do not use a c ring. In fact the spindle is no longer "permanently " attached to the filler cone anymore. HTH.

In case you wish to write to me, pls use ONLY email by clicking here. I do not check PMs. Thank you.

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Custom Pen Parts

I have been working on what I think is a complete solution to this repair and I am very close to launching the parts as a kit on my website.

The kit will contain the ring removal tool which has already been tested by a repair expert, and my new part which inserts the new ring in position with very little effort and inflicts no stress on the knob by tapping or forcing etc.

An option of which type of helix rod and some new C rings complete the kit.

When it is launched I will post photographs etc.

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  • 6 months later...
Custom Pen Parts

Hi

Having had quite a few enquiries regarding the "C" ring insertion, i sourced a high quality stainless tube which is perfect for using to seat the ring and is now listed on my site.

The diameters used are quite important especially the internal which because it is a good fit on my helix, the tube is accurately aligned in the knob before tapping the ring in and possibly damaging the form inside. the outside diameter clears the hole in the knob so this should not be damaged either.

I have not given up however on the more advanced tool which is fully developed and waiting for me to make some......

 

tool 3.jpg

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GAtkins
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Custom Pen Parts

OOPS!

Thanks for seeing that, i copied a previous listing and did not fix the SEO

Should be ok now

Roger

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Michael R.

Great to know! 
 

Your work is much appreciated 🙂

 

Do you plan on bringing back the rods as well?

 

Cheers

 

Michael

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CoolBreeze
11 hours ago, Custom Pen Parts said:

OOPS!

Thanks for seeing that, i copied a previous listing and did not fix the SEO

Should be ok now

Roger

I'm sorry - I still may be confused between the two. As both are still on your site, what is the difference between the two? Thank  you!

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Michael R.
On 10/6/2020 at 11:49 PM, CeruleanToAzure said:

Thank you, it will work on 146s too?


The helix is identical on 146 and 149 from the same period. So is the c-ring from my experience.

 

Would love to hear if somebody experienced differently.

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