Disc brake caliper lever bumps into caliper body

Not sure if it is still actual but making lever go further than it suppoed to WILL result in brake caliper failure. Inside a caliper there is a piston. Piston is made out of two cylinders, one is has a notch preventing it prom turning, other turns freely. Between cylinders there are 3 metal balls that gave grooves that they sit in.Grooves have dynamic depth. When lever is pulled the turning cylinder spins and balls are pushed out of deeper grooves and made to go up to less deeper part of a groove. That pushes the piston that pushes the prake pad. If cylinder is turned too much balls fall out of their groves and braking mechanism fails. To repair it you have to take caliper apart and lace balls back to their grooves.

Hi, I have problem brake disc touching the caliper brake. Refubrished Strida and chagned all washers and brake discs follows the official plan.

Hi,
pardon me, but that image is a little bit small and dark…

I guess you missed to install two washers;
between each one which is in direct contact with the caliper (that convex - concave connection)
and the frame lugs
there has to be another, flat washer.

Hint: At the original drawing / detail 240-04 you can see four times part nr. 7

  • even if just two pairs of the parts are identical!
    Sadly not good visible on that image below, please disregard the blue arrow:

Thank you very much for reminding - that is misleading issue nr. 3 at the manual!
:confused:

Impossible to verify at your image; it needs to be bigger, brighter and a little bit more to the right to see that.

Hi sorry I been so frustrated because forum don’t allow me login for last 3 days :slight_smile:

https://www.flickr.com/photos/185105605@N08

Can you look that?

I’m uploading YT Video is well…

Hi Damian,

welcome at Stridaforum :smiley:

Please pardon me for assigning your post to the wrong user first.

You were logged in the last time today at 10:28 and you were visible,
could you please try again?

Cheers,

Chris

Hi, Yeah everything is working currently… don’t know how long it will… had some Forbidden 404 errors and can’t contact with anybody from forum at private message.

Attaching video: https://youtu.be/DUShDcytcm0

Many thanks to Mark Salo who I spoke on Instagram - he helped me a lot! GOOD LAD!

Sorry if I messed up something in your forum :slight_smile:

Hi Damian, I hope this photo helps, on a front caliper the bolt and washer should fit like this. The thick washer with the curve in it matches the curve on the caliper, this helps align the caliper to the plane of the brake disk when tightened. The small silver washer fits under the bolt head.

Cheers, Bill

I don’t think that you are able to mess up the forum - and it’s not mine, all I have are a mod’s rights.

@Bill:
Obviously he has older bolts, these are domed at the underside - same as on the caliper.
In this special case, the washer has to be mounted between frame and the 2nd conical washer.

@Damian:
It seems you mounted the upper conical washer (below the bolt’s head) vice-versa.

I see that silver washer in my Strda Evo3 … that white Strida never had extra sasher… I will find any in my parts cupboard and check. :slight_smile:

The screw is not flat as on the pic made by Bill… I need check in old parts what I got maybe old screws where flat (they been replaced on new - screws and washers).

That’s what I meant above.

Would you mind to check if the login now works for you?

Login is working with no problems now… 3 days had fight with that…

Is bit irritating writing hello and yes all the time - but my browser remember the answers so is not too much problematic.

Hi, man from Strida Nederlands told me to do it like that.

I follows how is in my Strida Evo3

Front wheel is breake, black washer, silver washer, body, bolt.

Back wheel is breake, black washer, body, silver washer, bolt.

Front seems perfect, I’ve just bit scratching noise in back wheel.

Guys please confirm something - IS IT DEFINITELY PART 340-06 don’t need be fitted anymore? because I removed back wheel today and realized broken part 338 (it is metal tube with washer in the middle) Seem like is screwed too hard? OR is fault because no RING? Or because part 376 is an plastic washer? I;m sure before where metal once - man from shop in Nederlands said is plastic now.

Part 340-06 is required for the old plastic freewheels only.
Not necessary for the newer aluminium freewheels.

Typical issue; part 338 (magnet spacer) is broken very often but explicitly required for correct function of the magnet’s counterpart.
Together with three plastic washers (376) and one metal washer (469) will this system establish the tilt-function of the magnet’s counterpart.

Absolutely, also a typical issue - do not overtighten the wheel bolt 379!!!
I wrote an extra thread regarding this f… bolt - you can find it here
Tips from Mark.pdf torque warning!

No.

Again, there have to be three in sum, refer here for the correct parts sequence:

The three plastic washers and one metal are standard since ten years I can assure.

I’ve just 15Nm wench and is not clicking so I just done it carefully. I’ll have a ride and will do any corrections. :slight_smile: Thanks

…does that mean you screwed that on this way - with the broken magnet spacer?

And sorry I forgot to mention that the wheel bolt should be glued with thread locking compound (Loctite or simliar).

No I’ve replacement :slight_smile: I ordered 3 of them!

Loctite done is well.

Back wheel is bit bouncing just minimally. I think is normal anyway…

Unfortunately broke the brakes on test ride! I mean bolt broke from (brake cable) It is just my bad luck :smiley: cool I have my second Strida…

Hi, I received new brake calipers and cables. Was still something wrong with that. Decide go to bike shop - my neighbor. He said caliper touching the disc and started making some silly adjustments - adding some different washers. Then I said enough and came back home.

I feel so bad with this bicycle. I spent a lot of money to make it how is it now!

I screwed calipers as on my Strida Evo3 (same as instruction what gave me Friso from Stida.NL)

Brake disc touching caliper body :frowning:

Changed everything upside down.

FRONT - short screw, frame, silver washer, black washer, caliper.

REAR - long screw, silver washer, frame, black washer, caliper.

Front looks fine, spin and stops smoothly.

Rear is bit tight. Is stopping well but left pad need be tight to the brake disk because is i screw it back is not stoping.

Is it right or not? I’m seriously getting crazy with that.

Well…unfortunately I don’t get the point of the problem I’m afraid…

Maybe better to use inner and outer pad instead of left and right in that case, inner is that one closer to the spokes.

The inner pad has to be as close as possible to the rotor always because it is not moving while braking.
The outer pad gets in touch first with the rotor and BENDS it onto the inner pad, braking starts once the bent rotor was clamped between both pads.
(More sophisticated calipers do move both pads btw.)

Yeah, I think it was just my panic. I done it myself I think now is definitely fine!

Thanks a lot everyone!

Now I just need reduce squeaking noise when I ride… but it is different topic anyway.

Next week Strida 1986 will see the sunshine fist time from a year.