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Mujahid Khan
Experienced User
Username: anjumkha

Post Number: 29
Registered: 12-2003
Posted on Saturday, 22 July, 2006 - 12:02 pm:   Edit PostDelete PostView Post/Check IP

SSII 1977
While removing the heads I had to bend the high pressure line from the brake pump ( B bank). I am not able to fabricate a line owing to a tortuous route. Is it possible to have a hose line fabricated by a hydraulic shop?
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David Gore
Moderator
Username: david_gore

Post Number: 625
Registered: 4-2003
Posted on Saturday, 22 July, 2006 - 12:26 pm:   Edit PostDelete PostView Post/Check IP

Hi Mujahid,

Any competent industrial hydraulic specialist should be able to supply and bend a suitable length of hydraulic pipe for you at a reasonable price. I would not use a hose due to the possibility of vibration causing abrasion and subsequent leakage from the hose or damage to the adjacent engine fittings - the rigid pipe will keep clearance from any potential abrasion sites.

Best wishes David
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Bill Coburn
Moderator
Username: bill_coburn

Post Number: 681
Registered: 4-2003
Posted on Saturday, 22 July, 2006 - 07:08 pm:   Edit PostDelete PostView Post/Check IP

I second David's advice. Onme of the first casualties with the 'new Shadow was this very pipe which initially was flexible and they simply blew out with catastrophic results. The advantage was that they were quieter but it was a big price to pay.
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Mujahid Khan
Experienced User
Username: anjumkha

Post Number: 30
Registered: 12-2003
Posted on Sunday, 23 July, 2006 - 12:43 am:   Edit PostDelete PostView Post/Check IP

Thanks David and Bill, I will stick with the hard pipes.
MK
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bob uk
Unregistered guest
Posted From: brig-cache-4.server.ntli.net
Posted on Monday, 24 July, 2006 - 01:33 am:   Edit PostDelete PostView Post/Check IP

You will notice that the Hydrualics only have flexible pipes fitted after the accumulators.

This is because the accumulators are like batteries and smooth out the pulses of hydraulic pressure from the pumps.

If the lines from the pump to the valve bodies were flexible the pump pulse would continually expand and contract them until they give up.

Flexible pipes can be contructed to with stand loads more pressure than 3000 psi that the Shadow has. But they would be bulky and may end up very close to the exhaust manifolds.

I have found that only seamless steel based pipes should be used. Knuifer is not man enough because of the pulsing.

Important only seamless steel based. Because the top bend near the pump is quite tight and the bending of the pipe is liable to cause a weak spot in the seam.

It is ok to reuse the tube nuts if they are in good condition.

The pipes are about 100 each from Bentley Crewe.

Flying Spares can get them for you.

Make sure that when the carbs are refitted that the air intake does not foul the rear pumps pipe otherwise it will fret and fail.

I know all this because I made that mistake and it cost me a new pipe.

Check for a gap between the pipe and the air intake a 1/16 of inch is enough. It must5 not touch even lightly.

The replacement pipe touched as well so on the advice of my Local RR specalist I bent the pipe away in situ with a small crow bar --just tweak.

(Message approved by david_gore)
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Hubert Kelly
Prolific User
Username: h_kelly

Post Number: 166
Registered: 3-2012
Posted on Wednesday, 18 February, 2015 - 04:23 am:   Edit PostDelete PostView Post/Check IP

Hi all, I have a question re steel pipe from brake reservoir to flexible hose pre accumulator.Toward the flexible hose the steel pipe has a collar approx one inch from end of pipe,I assume its to give stability when clip is round flexible pipe.
1. I have a set of brake flare however I don't believe I have one to make same?.
2. Is this a specialist job?.
3. Would a regular brake flare be sufficient to make same?.
Any advice great fully received.

Many thanks
Hk
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Brian Vogel
Grand Master
Username: guyslp

Post Number: 1217
Registered: 6-2009
Posted on Wednesday, 18 February, 2015 - 05:10 am:   Edit PostDelete PostView Post/Check IP

Hubert,

It's unclear to me whether you're talking about the return hose from the accumulator to the reservoir, but since the other flexible hoses go from the reservoir to the pump I'm assuming it's the return hoses.

As far as I've been able to determine these ridges exist as an aid to holding the hose on to the pipe. However, with the use of Jubilee clips they seem utterly superfluous. If you're making new pipes I would not be overly worried about this. If the length of hose you use slips on to the pipe by around an inch and is secured by the Jubilee clip it's not going anywhere.

The hoses from the reservoir to the pump are strictly gravity feed, and the return hoses from the accumulator to the reservoir carry fluid at very low pressure. Neither is going to have push-off issues secondary to fluid pressure. None of the hoses that come to/from the reservoir are under high pressure.

Brian
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Hubert Kelly
Prolific User
Username: h_kelly

Post Number: 167
Registered: 3-2012
Posted on Wednesday, 18 February, 2015 - 05:55 am:   Edit PostDelete PostView Post/Check IP

Hi Brian,
Thanks so much for that, its the pipe from the reservoir. I was of the same opinion as you but I thought it best to make sure.
PS.delighted to hear you have your car sorted/well at least you know its the eletronic ignition.
Many thanks
Hk

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