CNC Brake Fluid Reservoir Cap

[Mark K]

I'm using the CNC brake reservoirs in my build, and need to source a new cap for pressure bleed purposes. Unfortunately, CNC is now out of business. Anyone have any ideas what else I can use to substitute or build a pressure bleed cap? ID seems to be about 40mm.

Thanks,
- m

140937

[CDXXVII]

https://www.ebay.com/itm/Pressure-Bleed-Lid-Round-For-CNC-Brand-Master-Cylinders-Dunebuggy-VW/114628910829?hash=item1ab06a5eed:g:oYoAAOSwJFlf~yH C



https://agm-products.com/products/cnc-brake-reservoir-cap?variant=32802820292696&currency=USD&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&gclid=CjwKCAiAgJWABhArEiwAmNVTB4YmZkqpVFmq1_vfOuaV cpRh9yxjeoSILKNwjZubafEShkYSbRBOCxoCQeoQAvD_BwE

[Papa]

I found this listing.

https://www.butchsspeedshop.com/product_p/1459a.htm

[Mark K]

Awesome, guys...thanks! I need to work on my search skills. :-)

[Avalanche325]

Call before you order. A LOT of smaller places don't keep their sites up to date. I found that out when I got one of the world last triple reservoirs.
They are definitely worth the effort to track one down.

[edwardb]

I saw a post where someone made a pressure cap out of a rubber stopper. Drilled a hole in the center for the Schrader valve. Only needs to hold 6/8/10 PSI, and not for very long. Seems like that could work.

[Fman]

Mike Forte sells them, I also have one your welcome to use.

[frankeeski]

Since I use my pressure bleeder on a variety of reservoirs, I made my own adapter out of a block of aluminum. You could do the same with a piece of 3/16" to 1/4" plate aluminum. Use a piece of sheet rubber and glue it to the bottom side and drill and tap a hole for a fitting. C-clamp holds it in place on the top of the reservoir. I'll try and snap a picture of the piece I made over the weekend.

[nuhale]

Lots of good solutions but will add mine. I bought a rubber stool foot that fit over the reservoir threads on my Scotts hotrods triple. Drilled a hole and threaded a 1/4" tube barb with some silicone to seal it up. Worm drive clamp to hold it in place. Worked like a charm and was around $2 solution.

[Avalanche325]

I prefer the condom and zip-tie method myself.

[mburger]

I got my bleeder cap from AGM Products.

https://agm-products.com/products/cnc-brake-reservoir-cap?_pos=3&_sid=aa173f834&_ss=r

This is a direct fit for a CNC and Jamar. I personally tested on both.
Thanks to Avalanche325, I bought what I believe was the last remaining triple CNC reservoir on Earth. Lol

Edit: I see CDXXVII linked the exact same cap.
Also, looking at the other links and solutions in this thread, I paid about 3 times what I could have. But that’s par for the Mk1 rebuild course!

[Mark K]

Thanks for all the great responses and solutions, guys!