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Brake Servo Vacuum Hose?

vacuum hose brake servo 93188760

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#1 Stonos

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Posted 14 December 2019 - 06:59 PM

My brake servo vacuum hose does not look good at all and now I need something to replace it with.

It is part 15 here: https://opel.7zap.co...ar/e01/j/0/5-0/

The original part number 93172328 have inner diameter of 10.5mm. The hose in my car is marked "Vacuum airbrake hose 10.5mm ID" so I have the original hose still in the car.

The newer part 93188759/93188760 that replaces 93172328 have inner diameter of 10mm. From what I have understand a lot of cars have had the hose replaced under warrant and the new hose have red stripes (=93188759/93188760 i guess).

I saw a picture of a hose that clams to be 93188760, it had red stripes and was market "Semperit TU25 Öl/Luft Oil/Air PN 25 bar...".

 

Can someone with a red stripe hose in there car confirm the marking on the hose?

 

The spec for this hose: https://www.semperfl...rit_TU25_en.pdf

I have found NOS of 93188760 in UK, but I live i Sweden. If I can find same thing here per meter instead of buying GM part number from UK I would prefer that. 

 

Another alternative is to buy any vacuum hose with inner diameter of 10mm with outside diameter of 18mm or less.

The Semperit hose is a general purpose hose and not a dedicated vacuum hose from what I understand, so getting a true vacuum hose might be better.

There are many on Ebay claiming that they are sell vacuum hose, but far from all looks to be hoses for vacuum. A hose that can stand the pressure from compressed does not necessary stand vacuum without collapsing.

After some research I found two SAE standards:

SAE J 1402 - Automotive Air Brake Hose (compressed air) https://www.sae.org/...t/j1402_201710/

  SAE J 1403 - Vacuum Brake Hose https://www.sae.org/...t/j1403_201409/

The hose should thus have SAE J 1403 specification and not only SAE J 1402.

The best I have found so far is Cardon 1405: https://www2.codan.com/node/28343

It has SAE J 1403 spec and temperature range up to 125°C (Semperit 80°C). The problem is the inner diameter of 9.5mm (do not know the tolerance) and It looks like many vacuum hoses have inner diameter 3/8" = 9.5mm.

Can someone that have done the hose replacement comment on the fitting. Will it be possible to fit a hose with 9.5mm inner diameter? 

Does anyone have any other suggestions for brake servo vacuum hose?

 

When it comes to replacing the hose i have found these threads:

http://www.vx220.org...ake-servo-hose/

http://www.vx220.org...ervo-hose-swap/

Is it a doable jobb? Anyone having comments to how the job shall be done?

 



#2 turbo boy

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Posted 15 December 2019 - 05:02 PM

Following. I have never replaced mine and really should take the opportunity when I go fully braided next year. Would also appreciate the advice on where we can find replacements here in the UK 👍

#3 2-20

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Posted 15 December 2019 - 06:10 PM

I confirm that the marking you have read is correct.
It ends by conductive R< 10^6 ohm/m

#4 2-20

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Posted 15 December 2019 - 06:29 PM

For changing mine i made a junction between the old hose and the new one with a small cylinder of wood going inside internal diameter and 2 small screws put tangentially.
Head of screws must not stay beyond external diameter. So you have a continuous hose and you can pull the old one.
You shoud put silicone to help sliding the hose.
Of course you need to remove the door sill to grab the hose and pull straight.
In my case it was easier as i have a hole in the wheel well and could access and see what i was doing.

#5 AustinB

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Posted 17 December 2019 - 12:15 PM

Before you attempt to replace the servo hose, read this: http://www.vx220.org...ternate-method/

We found this method so much easier than anything else published!  thumbsup







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