stuck brake calipers - tools
Posted: Sat Feb 12, 2022 5:36 am
Last year I wrote about resealing a brake caliper and how I went about that
recently I decided to overhaul a few other calipers I have - so they would be good spare parts.
one of these calipers had a real stuck piston, so in my search on youtube for a solution I came across this system - using a Diesel injector test pump
these are are like $120 online
[youtube][/youtube]
I also found some youtube video of people converting a bottle jack into a Diesel injector pop tester
figure a cheap bottle jack - $30 is something I could do.
a bit like this one.
[youtube][/youtube]
So I dismantled a bottle jack, removed the central piston, and with my Dad, turned up a component that inserted into the jacks top, locked in place by the Jacks lock collar. This component has a center hole with a M10 x 1.0 thread for screwing in a brake hose. I used 3 x O-rings to stop the leaks, didn't include a pressure gauge.
bottle jack piston removed
screen shot of sketchUp model of fabricated component (white) ( just made this model to show the component - as I don't have any photos of the component)
it is 28 mm dia, with 34 mm dia lock ring and 20mm long made from aluminium.
component is white, bottle Jacks screw cap is blue
fabricated insert inserted!
everything connected
So today , I manage to release all 4 pistons from 4 calipers.
I just use a rubber hose and a steel line to connect the jack to the caliper. It takes like 1 min to change calipers - This is so much easier than mounting calipers to the car brake system and using that to push the pistons out.
recently I decided to overhaul a few other calipers I have - so they would be good spare parts.
one of these calipers had a real stuck piston, so in my search on youtube for a solution I came across this system - using a Diesel injector test pump
these are are like $120 online
[youtube][/youtube]
I also found some youtube video of people converting a bottle jack into a Diesel injector pop tester
figure a cheap bottle jack - $30 is something I could do.
a bit like this one.
[youtube][/youtube]
So I dismantled a bottle jack, removed the central piston, and with my Dad, turned up a component that inserted into the jacks top, locked in place by the Jacks lock collar. This component has a center hole with a M10 x 1.0 thread for screwing in a brake hose. I used 3 x O-rings to stop the leaks, didn't include a pressure gauge.
bottle jack piston removed
screen shot of sketchUp model of fabricated component (white) ( just made this model to show the component - as I don't have any photos of the component)
it is 28 mm dia, with 34 mm dia lock ring and 20mm long made from aluminium.
component is white, bottle Jacks screw cap is blue
fabricated insert inserted!
everything connected
So today , I manage to release all 4 pistons from 4 calipers.
I just use a rubber hose and a steel line to connect the jack to the caliper. It takes like 1 min to change calipers - This is so much easier than mounting calipers to the car brake system and using that to push the pistons out.