excessive travel rear brake

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hairdoo
Posts: 222
Joined: Wed Nov 08, 2017 7:21 pm
Location: derbyshire

excessive travel rear brake

Postby hairdoo » Sat Jan 25, 2020 7:06 am

Can anyone give me some guidance ,last week i bled the rear and pedal travel was fine,but after a week the pedal travel is as bad !
Could the rear system be letting in air somewhere ?as it feels spongy too.
all system is original so is it time for new parts or a refurbish session ?
Any guidance will be greatly received Dave

john
Posts: 3914
Joined: Wed Mar 26, 2014 6:48 pm

Re: excessive travel rear brake

Postby john » Sat Jan 25, 2020 9:02 am

Hi Dave,

I've had a similar thing with the font brake......drum on my rear.

Bled it up and it was great, but over a week or two the lever was almost back to touching the bar.
I striped the master and slave cylinders and re-sealed them. It's been OK since.

If there is no sign of a leak at the wheel cylinder then it probably points to the master cylinder needing a re-build.

It would be best to re-seal both cylinders, as that way you know the system is going to be good......seal kit's are not over priced, ;)

hairdoo
Posts: 222
Joined: Wed Nov 08, 2017 7:21 pm
Location: derbyshire

Re: excessive travel rear brake

Postby hairdoo » Sat Jan 25, 2020 4:53 pm

You say master n slave cylinders pardon my stupidity but on the d5 where are they?
Behind rear brake lever and where else ???

john
Posts: 3914
Joined: Wed Mar 26, 2014 6:48 pm

Re: excessive travel rear brake

Postby john » Sat Jan 25, 2020 8:43 pm

Sorry Dave, I get carried away sometimes, ;)

The Master is the cylinder at the pedal, and the slave is the brake caliper at the disc.

hairdoo
Posts: 222
Joined: Wed Nov 08, 2017 7:21 pm
Location: derbyshire

Re: excessive travel rear brake

Postby hairdoo » Sun Jan 26, 2020 9:57 am

Doh ,thanks for that John ! ill contact powerhouse automotive for a seal kit for the master n either new seals for the rear or i might buy a refurbed one they're £68 for a single pot caliper ...
They are only a mile away from me on the sheepbridge ind est ...

john
Posts: 3914
Joined: Wed Mar 26, 2014 6:48 pm

Re: excessive travel rear brake

Postby john » Sun Jan 26, 2020 12:33 pm

hairdoo wrote:
Sun Jan 26, 2020 9:57 am
They are only a mile away from me on the sheepbridge ind est ...
That's handy, :lol:

I got OEM ones for the front master, IIRC, they were less than £20.

CliveM
Posts: 587
Joined: Fri Jun 23, 2017 9:19 pm

Re: excessive travel rear brake

Postby CliveM » Sun Jan 26, 2020 8:38 pm

Also, if you haven't considered it already, try braided hoses, especially on the front. After a few years usage, the originals seem to go a wee bit porous. That is, they let air in. I got a mate to do mine five years ago, plus pads and what a difference it made, and remains so.

john
Posts: 3914
Joined: Wed Mar 26, 2014 6:48 pm

Re: excessive travel rear brake

Postby john » Mon Jan 27, 2020 11:25 am

+1 on Braided hoses.

hairdoo
Posts: 222
Joined: Wed Nov 08, 2017 7:21 pm
Location: derbyshire

Re: excessive travel rear brake

Postby hairdoo » Sun Jul 05, 2020 1:34 pm

fitted a set of HEL braided lines and what a difference theyve made.. Dave

john
Posts: 3914
Joined: Wed Mar 26, 2014 6:48 pm

Re: excessive travel rear brake

Postby john » Sun Jul 05, 2020 8:06 pm

Both my fronts are using HEL lines a great improvement on the OEM rubber hoses.....drums at the rear so no need for hoses, :lol:


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