Hello Guest User,

Please feel free to have a look around the forum but be aware that as an unregistered guest you can't see all of it and you can't post.

To access these 'Registered Users Only' areas simply register and login.

Calipers and Brake line

Need help restoring, building, or finding then try here.

Moderators: KeithZ1R, chrisu, paul doran, Taffus

Message
Author
Wayne1960
Custard Cream
Custard Cream
Posts: 613
Joined: 21st Aug 2013
Location: Kent England

Calipers and Brake line

#1 PostAuthor: Wayne1960 » Sun Jan 19, 2014 2:18 pm

when i connect the metal brake hose to the calipe should it tighten up so the mateal doesnt spin? when its tight i can still move it! should there be any sort of seal? nothing came with the metal hoses.
Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.
Bike now finished what a joy!

oldtimer
100Club
100Club
Posts: 318
Joined: 2nd Mar 2013
Location: stoke on trent

#2 PostAuthor: oldtimer » Sun Jan 19, 2014 3:09 pm

Are you talking of the round banjo fittings? if so you should have a copper seal each side of it, don't suppose you have new banjo bolts and they are very slightly longer than the originals?

Wayne1960
Custard Cream
Custard Cream
Posts: 613
Joined: 21st Aug 2013
Location: Kent England

#3 PostAuthor: Wayne1960 » Sun Jan 19, 2014 3:35 pm

Hi no i am talking about the hard pipe connection to the calliper the bendy metal pipe that goes into the top of the front disk caliper. i have screwed it down tight but it is still loose!
Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.

Bike now finished what a joy!

User avatar
jimmock
Hardcore
Hardcore
Posts: 8947
Joined: 1st Dec 2009
Location: Central Scotland, near Zedinburgh.

#4 PostAuthor: jimmock » Sun Jan 19, 2014 3:35 pm

Some pics might help here.


:mor
Jimmock. :wnkr


SPEED IS JUST A QUESTION OF MONEY...HOW FAST DO 'YOU' WANT TO GO?

I hate people I don't like !

User avatar
jimmock
Hardcore
Hardcore
Posts: 8947
Joined: 1st Dec 2009
Location: Central Scotland, near Zedinburgh.

#5 PostAuthor: jimmock » Sun Jan 19, 2014 3:37 pm

Sounds like something is missing.

Or you have an issue with the male / female taper??
Jimmock. :wnkr





SPEED IS JUST A QUESTION OF MONEY...HOW FAST DO 'YOU' WANT TO GO?



I hate people I don't like !

User avatar
Redbeard
Hardcore
Hardcore
Posts: 1264
Joined: 7th Feb 2009
Location: Aylesbury, Buckinghamshire

#6 PostAuthor: Redbeard » Sun Jan 19, 2014 3:51 pm

I know the hose you mean, 6" or so long, connects caliper to brake hose. I remember the one on my 750 always spun round with no leaks. Didn't seem to tighten, must be how they are meant to be.

Wayne1960
Custard Cream
Custard Cream
Posts: 613
Joined: 21st Aug 2013
Location: Kent England

#7 PostAuthor: Wayne1960 » Sun Jan 19, 2014 4:30 pm

Redbeard
dont you just love it when someone tells you something you realy want to hear.
Thanks for that. Not sure how it doesnt leak when you think of the pressure your pushing in but ill take your word on it.
Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.

Bike now finished what a joy!

User avatar
Redbeard
Hardcore
Hardcore
Posts: 1264
Joined: 7th Feb 2009
Location: Aylesbury, Buckinghamshire

#8 PostAuthor: Redbeard » Sun Jan 19, 2014 4:36 pm

No problem. Not sure how it works either, but it didn't leak. Hope it works out ok. I can't confirm for sure if there was a seal but there was a fitting at the end of the metal hose where it met the caliper.

wilsonsjw11
Hardcore
Hardcore
Posts: 1317
Joined: 18th Jul 2008
Location: West Sussex/Central London

#9 PostAuthor: wilsonsjw11 » Sun Jan 19, 2014 8:03 pm

The interior nipple within the caliper is probably worn and the flared end on the pipe bridge won't tighten down on to it fully to form a seal.
Just make sure the threads are clean/good right down to the nipple.
Regards
Steve

Wayne1960
Custard Cream
Custard Cream
Posts: 613
Joined: 21st Aug 2013
Location: Kent England

#10 PostAuthor: Wayne1960 » Mon Jan 20, 2014 10:44 pm

Hi Steve

Interior nipple? I have tonight removed the metal break line and checked the calliper inside the threaded hole. The bottom of the hole looks like it is slightly cone shaped and there is a hole in the middle which looks clean enough.
Threads are clean also but when I put the boreal line back in and tight there is a good 1mm slack movement and when I blow down the tube air escapes between the threaded bolt and the tube.
Doesn't feel right to me
Any advise?
Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.

Bike now finished what a joy!

User avatar
z1bman
Hardcore
Hardcore
Posts: 4227
Joined: 3rd Mar 2010
Location: WORDSLEY WEST MIDLANDS

#11 PostAuthor: z1bman » Mon Jan 20, 2014 10:59 pm

your brake pipe should look like this
it might be that the brake pipe nut is not screwing far enough in to the caliper to compress flared end of the brake pipe
Image
Last edited by z1bman on Mon Jan 20, 2014 11:06 pm, edited 1 time in total.

Wayne1960
Custard Cream
Custard Cream
Posts: 613
Joined: 21st Aug 2013
Location: Kent England

#12 PostAuthor: Wayne1960 » Mon Jan 20, 2014 11:03 pm

Yes 100% like that but it doesn't fully tighten down eg when fully wound down into calliper it still loose!
Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.

Bike now finished what a joy!

User avatar
z1bman
Hardcore
Hardcore
Posts: 4227
Joined: 3rd Mar 2010
Location: WORDSLEY WEST MIDLANDS

#13 PostAuthor: z1bman » Mon Jan 20, 2014 11:10 pm

how far is the nut being screwed in to the caliper? can you see about 3 threads on the nut when it is fully tightened

Wayne1960
Custard Cream
Custard Cream
Posts: 613
Joined: 21st Aug 2013
Location: Kent England

#14 PostAuthor: Wayne1960 » Mon Jan 20, 2014 11:16 pm

Yes that's about right it feels like it has bottomed out ok and doesn't fee like it want to go any further. Same on both callipers.
Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.

Bike now finished what a joy!

User avatar
z1bman
Hardcore
Hardcore
Posts: 4227
Joined: 3rd Mar 2010
Location: WORDSLEY WEST MIDLANDS

#15 PostAuthor: z1bman » Mon Jan 20, 2014 11:21 pm

does the thread in the caliper go to the bottom of the hole?


Return to “Bike Help”

Who is online

Users browsing this forum: No registered users and 14 guests