That's not right.

The place to "speak geek"
User avatar
robin
Jedi Master
Posts: 10546
Joined: Mon Mar 27, 2006 1:39 pm

Re: That's not right.

Post by robin » Tue Oct 21, 2008 9:18 am

I've haven't seen one rust through yet, though I suppose it will happen. The main problem is that when people fit braided brake hoses, they use the original P-clip that is designed to take a rubber coated pipe of a larger diameter. The braiding on the smaller diameter metal brake hose can be abrasive and this cuts through the rubber inner of the P-clip resulting in metal-on-metal contact and in due course a failed brake line :shock:

That's why I said it's worth checking them while the wheel is off. The best solution is to sleave the steel hose with a piece of rubber petrol pipe or similar where it goes through the P-clip (or fit a smaller P-clip) - the point being the steel pipe should be clamped in place with rubber and no metal-to-metal contact (you don't want it touching the wishbone really either).

It has happened, so it is worth checking! I think some kits come with a plastic sleave already fitted to the braided hose across it's whole length; these should survive better.

Cheers,
Robin
I is in your loomz nibblin ur wirez
#bemoretut

User avatar
campbell
Posts: 17381
Joined: Sat Mar 25, 2006 12:42 pm
Location: West Lothian
Contact:

Re: That's not right.

Post by campbell » Tue Oct 21, 2008 8:01 pm

I think I should put this on my winter maintenance list, I had a chafing one a few years back although an FBF super special cable tie did the trick (on Stelvio or something I think, in fact!!)
http://www.rathmhor.com | Coaching, training, consultancy

woody
Posts: 5637
Joined: Mon Dec 26, 2005 4:03 pm
Location: Southside Triangle

Re: That's not right.

Post by woody » Wed Oct 22, 2008 12:03 am

Robin, once the P-clips on both my brakes lines and handbrake cable were pretty much done through corrosion and perishing of the cushion material when replaced earlier this year.

The part number for P-clips that are the correct (the right fit on the hose and a kevlar cushion) fitting for the stainless hoses is J1221g04; google is your friend for getting a hold of them. A rather large portion of my working day is dedicated to P-clips and attaching hardware.Hence, the overly geeky attention to them. Image :tired :|

User avatar
Kelvin
Posts: 656
Joined: Thu Apr 20, 2006 12:28 am

Re: That's not right.

Post by Kelvin » Wed Oct 29, 2008 5:11 pm

To me in fact, on the M1 on my way to the MOT garage. It was a little bit scary! When I replaced all the brakelines I used some smallish diameter hosepipe from my neighbours garden hose fitted around the brakeline and clamped this using the oroginal P clip. Regardless of how you protect the braided brakelines it is worth checking them regularly for signs of wear.
robin wrote:
It has happened, so it is worth checking! I think some kits come with a plastic sleave already fitted to the braided hose across it's whole length; these should survive better.

Cheers,
Robin

Post Reply