ufo bremszange

[robbe1960]

hello,
Is it possible to repair the ufo brake calipers?
New o ring and dust protection??

gruss

[KonstantinK]

yes, it's possible
The spare part number is 251 698 471 B and includes o-ring and dust protection

The easiest way to get the piston out of the caliper is using air pressure and vacuum to get it back in the caliper

I did it without air pressure and it does not make fun

[robbe1960]

hallo konstantink,
thanks for fast reply, i gues the part number is an audi number, so i go to audi dealer and get a repair set?

the pistons are already out, did it with air pressure , made a lot of noise when it came out.

robbe

[KonstantinK]

you shoult not use high pressure

yes, it is an audi spare part number

I'm not shure, but I think the price was around 12€ (in Germany) including dealer discount (I don't know the correct word - I got it cheaper )

[JörgFl]

Hallo Robbe,
when you renew your callipers, please take ATE-break grease at the "O-ring"( its not a o-Ring its a square-ring )
the piston will go in much easyer and
Because it is possible that the ring clips around by taking the piston in.
then the pisten was leaking and isnt able to go back after pressing the brake.

Normaly with grease(special brake-grease) you can take the piston in with hands only.

Mfg Jörg

[Elektronikfuzzi]

Hello,
for ufo-repair understanding:
I do put out the piston unsing air pressure...and put it in simply by "soft pressing" with the hands?
That means the piston is only plugged?

How is the dust-protection mounted?

Greetings
Manna

[KonstantinK]

There's one flute outside the piston and one inside the caliper

First you put the dust-protection over the closed end of the piston. Than you can insert the dust-protection into the flute of the caliper. The piston is jamming the dust-protection that it's not able to slip out.
The problem is to get the piston in the caliper because the square-ring clamps the piston. Therefore you need air-pressure - or even break-grease (I don't know that, but good to know )

If you want I can take some pictures, I have one caliper here, which is opened...

@JörgFl: Don't be so fussy!

Perhaps I should visit an english spoken country soon because I takes too much time to write a text like this

[JörgFl]

.....
@JörgFl: Don't be so fussy!

Perhaps I should visit an english spoken country soon because I takes too much time to write a text like this

Hallo Konstantin,Das mußt Du mir jetzt aber übersetzen....

Mfg Jörg

[KonstantinK]

was? Das "Don't be so fussy"? -> Sei nicht so kleinlich
War auf O-Ring - Vierkant-Ring bezogen

Oder auf meinen Satz am Ende? Der war nicht mehr direkt auf dich bezogen und sollte nur heißen, das ich mal wieder Urlaub in nem englisch sprachigen Land machen sollte, um mein Englisch aufzupolieren...
"Mechaniker-Englisch" lernt man nicht in der Schule, auch eigentlich sonst nicht das, was man braucht

PS: Es musste auch heißen "[...]because it takes[...]", wollte erst was anderes schreiben

[JörgFl]

Genau - fussy meinte ich...
Und worauf es bezogen war.

Mein Englisch ist auch nicht besser...
Allerdings bin ich viel im Netz unterwegs, und lese viele Englische anleitungen/beschreibungen.

Hauptsache der andere versteht was gemeint ist...

Mfg Jörg

[robbe1960]

ok, important is that we can understand each other, i can understand and read german but can not write it.to difficult
Thanks for the advice anyhow.
gruss, robbe