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  1. #1
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    New question here. Replacing Hope M4 Pistons & Seals

    One of my pistons on my rear caliper is leaking a slight bit. I would assume its a seal and dirt got in there. Its on the side closest to the spokes. What tools do I need to service the caliper pistons? Is it wise to replace all pistons/seals or just replace the one thats leaking? I dont think I need the special tool to remove the borecaps since the leaky piston is on the opposite side.

    Also, according to Hopes website there is a authorized distributor in Texas. Anybody order from them?

  2. #2
    Knollician
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    Quote Originally Posted by stumpynerd View Post
    One of my pistons on my rear caliper is leaking a slight bit. I would assume its a seal and dirt got in there. Its on the side closest to the spokes. What tools do I need to service the caliper pistons? Is it wise to replace all pistons/seals or just replace the one thats leaking? I dont think I need the special tool to remove the borecaps since the leaky piston is on the opposite side.

    Also, according to Hopes website there is a authorized distributor in Texas. Anybody order from them?
    Call Hope in Texas directly. The tool is like $16, and the parts are even cheaper. I had the same issue and replaced all 4 seals and pistons for like $25.
    "Three balls at once...who knew?" - Cotton McKnight

  3. #3
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    Any tips on replacing the pistons & seals?

  4. #4
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    Quote Originally Posted by stumpynerd View Post
    Any tips on replacing the pistons & seals?
    Its pretty easy. Remove the pads, and then hold the 2 outside pistons in place. Then pump the lever to push out the 2 inside pistons. Once those are our far enough to grab, pull them out. You can then use the tool to unscrew the caps, and push the 2 outside pistons out. Lube up the seals, and put the pistons back in. Screw the caps back on and bleed. Once you see it, it makes sense. Just be sure to get the 2 inside pistons out before you remove the caps and work on the outside pistons. Pretty simple once you see it.
    "Three balls at once...who knew?" - Cotton McKnight

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