How to make a simple tool to remove stuck caliper pistons

[Trigger]

I have never had any problem in removing stuck piston in the brake caliper and have always got them out by turning the compressor up to 300 PSI but, today i was sorting out some calipers that have been in the bottom of a box for years. They would not budge with the air line so, i set too making a tool from old bits that were laying around.

1) you need is a old brake pipe.
2) a hacksaw
3) grease nipple
4) a tap
5) a old copper washer

[Trigger]

Cut the old fitting off the pipe


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[Trigger]

Tap the fitting out to take a grease nipple.


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[Trigger]

I had to use a copper washer as, the angled nipple was not facing out.


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[Trigger]

Lock the bleed nipple off and attach a grease gun to the grease nipple and the piston was forced out.

Very simple tool 

[Laverdaroo]

I just it a plug in the banjo bolt hole with a bolt of the same thread and used a cheap grease gun that I use on the digger rams. It fits the Honda bleed valve and just simply pumped it out. The nipple is sacrificial anyway. Worked a treat and didn’t have to construct anything
These ones wouldn’t blow out either, still came out with an audible pop


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[robvangulik]

Same, even if the greasegun thread just goes one turn in the banjo hole the piston will pop out nicely!

[McCabe-Thiele (Ted)]

I only have a manual grease gun that wastes more grease than it uses to lubricate.

Same principle but I used an old car master cylinder (old Mini) connected via pipe using the hydraulic pressure to push out any seized piston as my manual grease guns never worked.

Pretty sure an old  bike master cylinder would work as well.

[Laverdaroo]

Mine’s only a pump up manual one, it’s all in the wrist
Must be


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[Trigger]

There are many ways to pop a piston out. No risk of damaging the thread and it can go the the oven for 20 minutes to soften the seal and is easy to attach to a hot caliper.

[Oddjob]

Mine’s only a pump up manual one, it’s all in the wrist
Must be


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And we all know how strong your wrists are, for some unknown reason of course.

Where's Phil when you need him?

[Laverdaroo]

Mine’s only a pump up manual one, it’s all in the wrist
Must be


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And we all know how strong your wrists are, for some unknown reason of course.

Where's Phil when you need him?

Pa ha ha haaa, indeed

takes one to know one.




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[davidcumbria]

After many hours of struggling over the years I bought one of these which gives me a massive smile. EVery time I use it. Have heard of injuries/ damage from the pressurise out method but thanks for the good explanation.
https://www.ebay.co.uk/itm/266253030610?hash=item3dfdead4d2:g:dscAAOSwFRhkW5a7&amdata=enc%3AAQAIAAAA8FmbKKVGyYaxRkFuslxlR5iX7Z5QA7fUu7gdEj1f0HvzZxzq9Osh%2BoBEH2jvJj3%2FHlBFekSivxw6598ZyFMIjCFA7tRuv1z31yNupz%2BC7gm%2FIIAnNJGk5n20H4SPTW%2FxQb6IrjIHWGrOlsElCMjjnQCPKcYo6sV7PhSvxzYL%2Fqmf2HnNn2d74y1PdfOC2LlNfJPzt4DbGpDwXfNxT9o20gf19yQINTPjP%2BCVYvuCt85o9Qoq%2FgM5LOmujqFA%2Bd2fN3DYCuIb2n5oisXgWEEJ5DW3WSOjFEfjZnRP78E7QtZIh7cm%2B%2BoNY0GidES39bueDw%3D%3D%7Ctkp%3ABk9SR8aPhOKgYg

[Laverdaroo]

I did have one of those but fell victim to being leant out and never getting it back. Still listed on the whitebpard in the w.shop to be replaced. Great bit of kit aren't they?

[Matt_Harrington]

After many hours of struggling over the years I bought one of these which gives me a massive smile. EVery time I use it. Have heard of injuries/ damage from the pressurise out method but thanks for the good explanation.
https://www.ebay.co.uk/itm/266253030610?hash=item3dfdead4d2:g:dscAAOSwFRhkW5a7&amdata=enc%3AAQAIAAAA8FmbKKVGyYaxRkFuslxlR5iX7Z5QA7fUu7gdEj1f0HvzZxzq9Osh%2BoBEH2jvJj3%2FHlBFekSivxw6598ZyFMIjCFA7tRuv1z31yNupz%2BC7gm%2FIIAnNJGk5n20H4SPTW%2FxQb6IrjIHWGrOlsElCMjjnQCPKcYo6sV7PhSvxzYL%2Fqmf2HnNn2d74y1PdfOC2LlNfJPzt4DbGpDwXfNxT9o20gf19yQINTPjP%2BCVYvuCt85o9Qoq%2FgM5LOmujqFA%2Bd2fN3DYCuIb2n5oisXgWEEJ5DW3WSOjFEfjZnRP78E7QtZIh7cm%2B%2BoNY0GidES39bueDw%3D%3D%7Ctkp%3ABk9SR8aPhOKgYg

Sorry to be a bit thick but how does that kit work?