Hope E4 Piston tool...
 

Hope E4 Piston tool - ghetto Lego job

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I've read before that a tool to push out and clean one piston at a time on Hope E4, four pot brakes can be made out of Lego.

 

I'm pretty sure the person who did this specified which Lego pieces would make things the correct widths. The main problem here is that it is not my brake that is the issue, but a mate who is getting his knickers in a twist. Ideally he needs to sort this brake before Wednesday night. He is struggling to lay his hands on the proper tool. Narf.

 

Does anyone on here recall seeing anything anywhere on this?

 

Or, despite having never touched the stuff, am I having some kind of LSD trip?

 
Posted : 30/03/2025 8:29 pm
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Hope have a 3D file you can download to print one if you know anyone with a printer.

https://www.hopetech.com/open-source-tools/

 

This looks like the Lego thing

 

 
Posted : 30/03/2025 8:49 pm
nickingsley reacted
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Can’t these be easily 3D printed? No services or a mate local to you to do this?

https://www.hopetech.com/open-source-tools/

 

 
Posted : 30/03/2025 8:52 pm
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Currently rummaging through the boy's 5 Lego heads of lego!!!!

 
Posted : 30/03/2025 8:55 pm
zerocool reacted
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Where in the country are I have one you can borrow if anywhere near the south midlands.

 
Posted : 30/03/2025 10:01 pm
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Get a yellow spacer block that’s long enough, any make will do. And trim it to fit. Then hack saw a quarter out of it

 
Posted : 30/03/2025 10:34 pm
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I use Shimano spacers cut down 

 
Posted : 30/03/2025 10:56 pm
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I use a little block of wood(oak as it happens) shaped to exactly fit the brake pad slot, with one part reduced for the piston to come out against, but not so far as it could accidentally come out too far and , well hydraulic fluid time ...

Another small hole so a pad pin can fit in and hold it all in place.

10 min job. Cost £0.00

 

 
Posted : 31/03/2025 2:34 am