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250 Help: Fitting instructions for rear brake lines

Discussion in 'Suspension, Brakes, Wheels & Tyres section' started by James B, May 11, 2016.

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  1. May 11, 2016 #1
    James B

    James B

    I was just wondering if anybody might be able to help me out with some fitting instructions/workshop guide for fitting the flexible rear brake lines? These are the short lines that fit over the rear beam and are only about 150mm long, if that.

    I looks as though in the factory everything is assembled one after another, and therefore it works, but when you are trying to remove them with the rear caliper and fixed hard line in place, it looks really tricky. I know that KTEC fit the rear braided lines with no trouble so it must be possible without too much trouble, but the only way I can think of doing it is to remove the rear caliper itself and unwind the caliper and the solid line from the flexible line that I want to remove, which will then allow me to remove the flexible line. But this just seems a bit bizarre!

    Has anyone got any tips or instructions at all? I'm a bit stuck!

    Cheers :smile:
     
  3. May 15, 2016 #2
    -Chris-

    -Chris-

    I've yet to do mine too. I'd be interested in how you get on with this
     
  4. May 16, 2016 #3
    -Jamie-

    -Jamie- RSM Moderator

    I've had mine sitting for like 3 years waiting to be done, I'm probably never gonna bother with them now [emoji23]
     
  5. May 16, 2016 #4
    Korky

    Korky

    Remove rear drivers wheel, Get a brake line spanner you will need 2 of them 11mm for unions and 14mm for new braided fitting undo brake hardline from rear flexi (lower side of the beam) the undo the upper side, remove outside flexi, remove inside flexi with same method, replace inner then outer flexi with new braid, bleed brakes and check for leaks. As far as I am aware there is no full flexi replacement to the rear callipers on the section at the rear beam


    Regards
    KT
     
    ewant81 likes this.
  6. May 21, 2016 #5
    James B

    James B

    Hi Korky,

    Thanks for the help but I'm a bit confused by what you've said, and also by what I've been told by somebody else who has apparently done this.

    Before I put this thread up I had actually managed to fit one braided line (to the drivers side) but I could only achieve this by cutting the standard hose in half and then I was able to undo it from each end. The new braided line had a 'spinning' end to it that enabled me to firstly thread in the other fixed end of it to one of the hardlines and then I could thread in the spinning end. However, it seemed daft that I had to cut the old hose in half to allow me to undo each end (otherwise it wouldn't twist enough for either of the two ends to unthread enough to come out, so by cutting it in half I essentially had two separate pipes and no issue) so I am trying to find out the best way of fitting these.

    The problem is that the other pipe does not have this spinning attachment, and from what I can tell it isn't meant to, either.

    But how on earth are you able to remove the old hose and then refit the new braided line when the hardlines at either end of the hose in question are fixed??

    The only method I can think of is to literally remove the whole caliper and undo the hardline from the hose whilst it is attached to the caliper and then I will be able to undo the hose.

    Surely this isn't right?? If anybody has got the Renault work instructions, that would be such a massive help! :smile:

    I've just come in from trying to do the other side and I cannot figure it out at all.

    Cheers!

    James
     
  7. May 23, 2016 #6
    Korky

    Korky

    Are you trying to say the union to the braided line at the rear axle is fixed? I can assure you, it shouldn't be, you need a 11mm brake pipe spanner to undo the union from the rear flexi then you have to pull the rear flexi and the hardline Union away from each other essentially grab a photo it might make it easier to explain
     
  8. May 23, 2016 #7
    T&biskits

    T&biskits

    Passenger side has a clip over it holding it in place, pull this over with a bit of fiddling(front side ). Passenger side has an odd fitment on the front side. There is no need to cut anything on both sides. Undo the front union & pull out from flexi & then pull the odd fitment out from the hole in the bracket, you will need to give it a bit of a twist & wiggle as they are snug between brackets. Do the same with the rear union before you take out the front side( undo it). I put a plug on the front pipework after i got the hose out as i thought the fluid would piss out, but it doesnt. This probably makes no sense as i am shit at explaining things, but there is definitely no need to cut anything. The fixed pipes on the beam will push back a little as you have the other flexi that goes into the caliper.
     
  9. Jun 1, 2016 #8
    Chri5

    Chri5

    How did you get on with this?

    I've got my lines hear ready to fit on my r26, and both ends of both rear hoses are also fixed.
    I haven't actually looked at the current lines yet but I seem to remember my 172 having a similar setup, and I can't remember how I did it.

    I tried to make sense of the post above but couldn't in my head lol.

    EDIT:I think I get it now....basically the part on the car should turn into the flexi line at one end
     
    Last edited: Jun 1, 2016
  10. Mar 25, 2018 #9
    Danny Danger

    Danny Danger

    Do people bother doing these. I can see the original posters point.

    On the brake hose end its ribbed all the way around which sits inside the bracket thus not allowing it to turn. On the brake pipe where it's unscrewed with an 11mm flair spanner, it's that stuck on it will just snap on the brake line.

    Will brake pipes be expensive from Renault, or just make some new ones out of copper.
     
  11. Mar 25, 2018 #10
    -Jamie-

    -Jamie- RSM Moderator

    Mine are still sitting in their packaging, as i probably would of snapped the OEM lines before they released. God knows what Renault make them out of but the unions on all the OEM lines are utterly terrible. I have replaced the rear caliper to beam ones 3 times now and have finally gotten fed up and stuck some decent quality full braided ones on from Pro Line.
     
  12. Mar 26, 2018 #11
    Danny Danger

    Danny Danger

    Is that pro line motorsport. Did you get them custom made. Your right the unions are terrible, Renault supposedly changed the brake fluid last year, I'd like to know how when 1 rear bleed nipple is rounded and the front inner nipple is snapped flush.

    Looks like new caliper time, I know rofag in Poland is cheap but there postage aint
     
  13. Mar 26, 2018 #12
    -Jamie-

    -Jamie- RSM Moderator

    Yeah it is, Mitch's kits are top quality, He does a full 6 line kit for them now but i just have his rear caliper lines as the rest is already braided, bar that small link pipe on the beam that woudnlt make a difference anyway IMO
     
  14. Mar 27, 2018 #13
    Danny Danger

    Danny Danger

    Jamie, is there any reason why the rear brake pipe goes from brake pipe to a flexi rubber pipe back to solid pipe at the union.
     
  15. Mar 27, 2018 #14
    -Jamie-

    -Jamie- RSM Moderator

    Id imagine it is probably to take into account the movement of the rear beam under compression
     

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