Service period- brake and fuel hoses?

37 posts / 0 new
Last post
7 wonders of th...
Offline
Last seen: 1 hour 37 min ago
Joined: 17/04/2014

.....and then wash in dilute sulphuric acid scrub with sawdust and thoroughly rinse in water afterwards, this removes all the oxidization ideal if you are working the copper so the oxide doesn't get worked back in to the surface.

Brass however should not be quenched after heating as this fractures the structure

TomB
Online
Last seen: 2 min 34 sec ago
Joined: 17/04/2014

Or just replace the copper washer with a new one! 

My fuel hoses, particularly the two with swaged ends and fittings are original, so 23 years old.  I don't know why I didnt think of this earlier in the rebuild, but they need changing.  I've been following this and the other thread on Oertiker clips and will place an eBay order today.  Before I do, I just want to get clear what I need to do.  

Do I cut the fittings of the old rubber tube (using my Dremel probably) by cutting a line along the side of the metal fitting at the end of the pipe, and prizing the sleeve bit off, then puling the banjo (or whatever fitting) that is down the pipe bore? I don't want to slice through the pipe and cut the fitting within the bore.  Is this more or less right?  

And finally, is one hose clip adequate, or do I need two on each union?  

SM25T
SM25T's picture
Offline
Last seen: 2 hours 59 min ago
Joined: 17/04/2014
One is fine. Yes, just cut through the wedding band type crimp without going through the hose to the hose end fitting inside. Once cut, prise it apart with a flat blade screwdriver and pull the hose off the end fitting. It is very easy.
TomB
Online
Last seen: 2 min 34 sec ago
Joined: 17/04/2014

Morning, I've  successfully changed the fittings on the rubber hoses on the high pressure side with new R9 hose. The Oetiker clips were really easy to use.
 

Unfortunately the low pressure hose from engine to tunnel is longer than I have left so I'll need more R9 hose. However upon removal, I've discovered this is an R7 hose and looks in such a condition it doesn't need replacing. I've cut a sliver off one end and internally there is no cracking visible. Im minded to refit it. 
  
while doing this I saw the black plastic pipe that returns the fuel down the tunnel to the tank. What's the thoughts on replacing this, and why is it plastic? I thought petrol degraded plastic. The hp side is metal. Any thoughts on the practicality of changing this while the propshaft gearbox etc are fitted?

SM25T
SM25T's picture
Offline
Last seen: 2 hours 59 min ago
Joined: 17/04/2014
Maybe nylon ? Probably accessible with tunnel top removed ? Never heard of any horror stories ... yet.
Mechanical Moz
Offline
Last seen: 9 hours 18 min ago
Joined: 17/04/2014
The right kind of plastic is fine with petrol. Think of all the things that use plastic petrol tanks, including cars.