repair question high pressure hydraulic hoses

[shogun]

I already posted this on the E32 board on bimmerboard, but as I am in a bit of hurry to leave for Germany end of this week, maybe someone here can chime in which has already experience. I want to have the hoses replaced only and use the old steel lines . But cannot find a shop in Japan which will do it, as it is for power steering and they will not touch it. They do it for any other kind of high pressure hydraulic hose, but not for cars. These high pressure hoses are very expensive here and one costs around 250 $, so I will get them replaced in Germany.
http://www.bimmerboard.com/forums/posts/149423

[Rigmaster]

I have had high pressure hydraulic hoses made here for our tractor- I was thinking it would be a cheap alternative to have them do exactly what you are trying to have done- but I have never personally had it done.

I don't see why they would have a problem with this, must be some sort of fear of liability. Maybe just ask them if they can do it, and don't tell them they are for a car- tell them they are for a piece of off-road equipment...

If the metal ends are in good shape, and they can get the proper size rubber hose, I don't see why it wouldn't be just as good as a new hose.

Bret.

[Akhil]

If you are replaceing it with any thing other than original part, I won't recom. rubber hose, unless you have right equipment to test its pressure rating. It has to hold upto 2000 PSI.

[Rigmaster]

If you are replaceing it with any thing other than original part, I won't recom. rubber hose, unless you have right equipment to test its pressure rating. It has to hold upto 2000 PSI.


I certainly did not mean, nor did I think Shogun was attempting, to have these replaced with anything other than high pressure hydraulic hose. I mentioned "rubber" to distinguish between the 2 parts of the hose- the hard metal part and the "rubber" part- which is obviously reinforced rubber made to withstand high pressure.


Bret.

[shogun]

That are high pressure hoses made by Conti Tech in Germany. I have the exact specification and the same new hoses go onto the reman ones.
I know from other people in USA that they had similar probs when they asked for replacement and were talking to their shops about high pressure hoses for cars.
Here in Japan they do reman any kind of hoses for high pressure hydraulics like construction machinery, shovels, coal mining industry and so on. But not for cars they say. Must be fear of liability. But I believe a big crane in a shipyard powered by hydraulics and having a break down of hydraulics with 50tons hanging on the crane is more dangerous.
These hoses are not for the brakes, they are for power steering assist and LAD.
Anyway, I bring it to a special professional shop there and these are as spare for my stock.

[Blitzkrieg Bob]

Brakes, power steering and oil lines.

I just don't tell them it's for a street car, tell them it's for a race car, or boat and eight guys come up to the counter to check out what you're up to.

I bring in the old hoses and fitings, tell them the operating psi, temp and what type of duty-oil-gas-air. Good for custom jobs, but if there are mass produced lines available, they often turn out to be the cheapest.

Good luck

[shogun]

Thanks, just got info from Rainman:

The typical procedure is to take and cut off the metal sleeve over the hose with grinder or cutoff wheel in a 4 inch grinder. Then you remove the old hose, you use a new sleeve with the old metal fittings and new hose, the new sleeve is crimped into place just like the original. I've seen some shops the silver solder the sleeve onto the original end and then install the hose and crimp but it seems like doing something completely useless to me.

[winfred]

i have had many a line rebuilt before i got the tools to swedge my own lines, i find the best thing to do is say it's for a forklift steering system and if they get nosy play dumb and say you are not the one working on it so you don't know what type of lift, unless they are a small crappy shop they will probably be using better hose then what came from the factory

[shogun]

Thanks Winfred,
here some pics when I changed them on my Highline, need long extension to get into the engine room.
And also a cause of the leak was that the p/o tightened the screws too much, broken screw, you cannot believe that
http://www.bimmerboard.com/forums/posts/124919

[winfred]

yes i can, just sealed up a right lad on a 735il that was pissing bad, the car owner said it needed a shock the manager said it needed a hose i cleaned the teflon tape off the fitting (the dumbass must of installed) and tightened it down fixing the leak, then i proceeded to show him how his front suspension/steering was about to kill him


And also a cause of the leak was that the p/o tightened the screws too much, broken screw, you cannot believe that

[genphreak]

I already posted this on the E32 board on bimmerboard, but as I am in a bit of hurry to leave for Germany end of this week, maybe someone here can chime in which has already experience. I want to have the hoses replaced only and use the old steel lines . But cannot find a shop in Japan which will do it, as it is for power steering and they will not touch it. They do it for any other kind of high pressure hydraulic hose, but not for cars. These high pressure hoses are very expensive here and one costs around 250 $, so I will get them replaced in Germany.
http://www.bimmerboard.com/forums/posts/149423Just be sure you don't leave any systems open to the atmosphere for too long and change your driers whenever you go tearing them apart! Jeff (Regal) just reminded me about the dangers of that, it makes things much cleaner to get it right first time when you have the risk of several regassings should the system not be right first time you gas it... :) Nick

[Bill R.]

about the power steering hoses?






Just be sure you don't leave any systems open to the atmosphere for too long and change your driers whenever you go tearing them apart! Jeff (Regal) just reminded me about the dangers of that, it makes things much cleaner to get it right first time when you have the risk of several regassings should the system not be right first time you gas it... :) Nick

[genphreak]

about the power steering hoses?Doh! Thanks Bill, I Got a bit of track there- was reading Erich's AC compressor hose link... :) Apologies peeps... Erich, surely someone like ENZED (http://www.enzed.com.au) will do it if you take it down and try a little subterfuge as the fellows have suggested?

[shogun]

Went to the hydraulic shop where my friend is a good customer, as he is the "Meister" repair manager of a truck repair shop, which needs a lot of hydraulic hoses.
Was on a Saturday morning, only the shop manager there which waited for us. Got from him a cop of coffee and he said, just take whatever you need and I will crimp it then in the press. So we grinded off the sleeves (have to be carefull, to avoid cutting too deep), then just pull off the old hose, measure and cut to size the new ones, get new sleeves, adjust the steel hoses in the right angle, get it into the press and ready.
I got some better ones with steel enforecement mesh inside, but same flexibility as the norrmal ones.
For the ones who are interested to know how such a press looks like, here is one for sale for abt. 4000 EURO, a simple one, the ones we used were a bit of the high tech version in this specialized hydraulic shop.
Guess what I had to pay, zero :D

But I gave him 20 EURO for the coffee money box.
http://partners.webmasterplan.com/click.asp?ref=45993&site=1382&type=text&tnb=23&diurl=http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=7584849281&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1

[genphreak]

Good work Erich, sounds like they will appreciate your genorsity there- I must remember to put up a 'coffee money jar' at our place. All we have is a milk-money glass in the fridge :( Hope Germany is heapppppz of fun and that you get to pilot somehthing exciting whilst you are there- especially if you get to drive into the alps or something. :) Nick

[shogun]

Hehe, you know what my rental car is?
Citroen C4 5 speed :p

But it goes fast enough.
At least in the cluster I can see a speed with 2 in front :D
Don't know if real speed is more than 200 kmh.

[winfred]

my hose press is not that fancy but it uses the same dies they are just squashed with a hand crank instead of a hydraulic cylinder

[shogun]

one of the old original hoses and old press bushes cut into 2 pieces. So the hose is without any metal part
http://img50.imageshack.us/img50/7659/hochdruckschlauch136mn.th.jpg (http://img50.imageshack.us/my.php?image=hochdruckschlauch136mn.jpg)
http://http://img50.imageshack.us/img50/7659/hochdruckschlauch136mn.th.jpg (http://img50.imageshack.us/my.php?image=hochdruckschlauch136mn.jpg)

[genphreak]

Hehe, you know what my rental car is?
Citroen C4 5 speed :p

But it goes fast enough.
At least in the cluster I can see a speed with 2 in front :D
Don't know if real speed is more than 200 kmh.I saw one (http://www.citroen.co.uk/c4/homepage.asp?pagetype=c4) the other day, kinda funky rear window arrangement, I like the design. The french have the design part of cars well-pat, problem is they tend to be built like yoghurt cartons. Maybe Yoplait has bought into the auto industry over there... i believe the C4 is popular in Yoplait's new 'Diesel' flavour too.

I'm sure you managed to get the little kart up to pace after you loaded those heavy lines into the back to weigh it down. I expect it was pretty hairy at speed in comparison to the civilised and stately 'slip' of the e32 though :D