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Thread: Pressing brake piston using wrenches - GIF

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    Supporting Member Altair's Avatar
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    Pressing brake piston using wrenches - GIF


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  2. The Following 4 Users Say Thank You to Altair For This Useful Post:

    albertq (Jan 28, 2024), bob_3000 (Jan 28, 2024), clydeman (Jan 27, 2024), nova_robotics (Jan 25, 2024)

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    Supporting Member IntheGroove's Avatar
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    Great. Forcing all that old brake fluid back into the master cylinder...

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    nova_robotics's Tools
    Don't do this with modern calipers that use phenolic pistons. The brake retract tools that have the two flaps that go in there and push out are much better.

    Watch out for a lot of European calipers that have that stupid screw inside. Those things won't retract at all no matter how hard you push on them. You have to push and spin the piston to get it to retract. They need a special tool.

    Newer cars with electric parking brakes are another issue entirely. Although I think most of them are actually easier because you can get them to retract themselves with a 12v battery. Yeah that's probably better.

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    Yeah-I discovered this when I first swapped pads on my Audi. Autozone loaner tools for the win!

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    Supporting Member bob_3000's Avatar
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    Quote Originally Posted by IntheGroove View Post
    Great. Forcing all that old brake fluid back into the master cylinder...
    Where do you want it to go?

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    Supporting Member IntheGroove's Avatar
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    Open the bleeder, put a hose on it and transfer the old fluid into a container. That way when you flush the system you will have less contaminated fluid to flush out. If you don't flush the system after a brake job, you are doing it wrong...

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    Supporting Member bob_3000's Avatar
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    Quote Originally Posted by IntheGroove View Post
    Open the bleeder, put a hose on it and transfer the old fluid into a container. That way when you flush the system you will have less contaminated fluid to flush out. If you don't flush the system after a brake job, you are doing it wrong...

    I'm just a driveway fixer person, not a professional.

    I can't see that little bit of fluid changing much if it's just daily driver, no heavy/high heat braking.

    Work vehicles have the fluid changed often enough that in-between full brake jobs I don't think it's a necessary step for just new pads.

    Either way, if I'm flushing the system I'm doing when the calipers are being replaced so ya I haven't ever gone that extra step for pads.



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