Ausmini
It is currently Thu Mar 28, 2024 11:41 pm

All times are UTC + 10 hours




Post new topic Reply to topic  [ 10 posts ] 
Author Message
 Post subject: Disk Hubs
PostPosted: Sat Nov 17, 2018 3:00 pm 
Offline
848cc
848cc
User avatar

Joined: Sun Aug 24, 2014 12:59 pm
Posts: 43
Location: Mansfield. Victoria
Hi guys, I have put new pre-built disc hubs on and have new CV joints, CK-BL-02, but when i put the disc and drive flange on, 8 1/4", i only have to finger tighten the nut and it all locks up. any Suggestions on this problem? TIA

_________________
1978 Leyland Mini 1275 LS
Hi Ho Silver and hopefully away


Top
 Profile  
 
 Post subject: Re: Disk Hubs
PostPosted: Sat Nov 17, 2018 3:11 pm 
Offline
848cc
848cc
User avatar

Joined: Fri Jul 21, 2017 1:14 pm
Posts: 303
Location: Branxton, NSW
I’d say at a guess they are built hubs but not set up correctly, ie too much preload. They have likely used aftermarket bearings which are hit and miss with the preload you will need to set them up properly and fit longer spacers and machine them down to get your required preload. I had to do this as well when building my hubs as one spacer was a bit short. Apparently timken bearing are better and can be put in and will have the correct preload and be good to go.

_________________
1972 Mk3 Mini 1000, 1150cc supercharged.
https://www.ausmini.com/forums/viewtopic.php?f=3&t=95872


Top
 Profile  
 
 Post subject: Re: Disk Hubs
PostPosted: Sun Nov 18, 2018 12:04 pm 
Offline
848cc
848cc
User avatar

Joined: Sun Aug 24, 2014 12:59 pm
Posts: 43
Location: Mansfield. Victoria
hpal wrote:
I’d say at a guess they are built hubs but not set up correctly, ie too much preload. They have likely used aftermarket bearings which are hit and miss with the preload you will need to set them up properly and fit longer spacers and machine them down to get your required preload. I had to do this as well when building my hubs as one spacer was a bit short. Apparently timken bearing are better and can be put in and will have the correct preload and be good to go.



Thanks, I had a suspicion that may be the case. ahh well, more time consuming jobs

_________________
1978 Leyland Mini 1275 LS
Hi Ho Silver and hopefully away


Top
 Profile  
 
 Post subject: Re: Disk Hubs
PostPosted: Sun Nov 18, 2018 7:57 pm 
Offline
1360cc
1360cc
User avatar

Joined: Mon Aug 23, 2004 10:07 pm
Posts: 10650
Location: SE Melbourne
The case hpal mentioned will be easily confirmed if you put the drive flange on without the disc.
If the flange only can go on and it doesn't lock up, check that your disc retaining screws arent too long or something like that.


Top
 Profile  
 
 Post subject: Re: Disk Hubs
PostPosted: Sat Nov 24, 2018 11:57 am 
Offline
848cc
848cc
User avatar

Joined: Sun Aug 24, 2014 12:59 pm
Posts: 43
Location: Mansfield. Victoria
Harley wrote:
The case hpal mentioned will be easily confirmed if you put the drive flange on without the disc.
If the flange only can go on and it doesn't lock up, check that your disc retaining screws arent too long or something like that.



put the flanges on on their own and all seems good. The bolts holding the disc to the flange do not protrude through the disc centre at all so it seems like the disc centre is too thick (? ) or the flange has been machined for some reason. These are the parts that were on the car when i bought it and it had been flogged so all things are possible. I think i will just get new flanges and discs and try from there.

Thanks for the info

_________________
1978 Leyland Mini 1275 LS
Hi Ho Silver and hopefully away


Top
 Profile  
 
 Post subject: Re: Disk Hubs
PostPosted: Sat Nov 24, 2018 12:37 pm 
Offline
religious status
religious status
User avatar

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39621
Location: near Baulkham Hills, NSW
If new drive flanges don't fix it, the problem is the bearing spacer supplied is too thin.
As hpal said above Timken kits seldom have this problem, but the no-name kits do. I recently had the same problem with an all new 7-1/2" disc brake kit.

See my blog in the how-to forum for assembly information.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


Top
 Profile  
 
 Post subject: Re: Disk Hubs
PostPosted: Sat Nov 24, 2018 2:26 pm 
Offline
848cc
848cc
User avatar

Joined: Fri Jul 21, 2017 1:14 pm
Posts: 303
Location: Branxton, NSW
They really shouldn't sell them as built ready to bolt on should they! If they've just built them with aftermarket bearings and not checked the set-up at all, it probably wouldn't be viable to set them up properly and as such they should probably only be selling prebuilt hubs using timken's so you can be pretty sure they'll be right.

_________________
1972 Mk3 Mini 1000, 1150cc supercharged.
https://www.ausmini.com/forums/viewtopic.php?f=3&t=95872


Top
 Profile  
 
 Post subject: Re: Disk Hubs
PostPosted: Sat Nov 24, 2018 3:09 pm 
Offline
religious status
religious status
User avatar

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39621
Location: near Baulkham Hills, NSW
My no-name kits had 1 spacer 5 thou too short, and one 3 thou short. I found a 3 thou longer one in my collection but had to machine a 5 thou longer one from steel tube. Luckily I have a lathe.

You only want around 1 thou preload when hub nut is fully torqued up.
If you run them with too short a spacer the bearings destroy themselves quick smart from excessive preload.
These aftermarket bearings seem well made, pity the supplied spacers are often too short.

_________________
DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


Top
 Profile  
 
 Post subject: Re: Disk Hubs
PostPosted: Sun Nov 25, 2018 3:53 pm 
Offline
848cc
848cc
User avatar

Joined: Sun Aug 24, 2014 12:59 pm
Posts: 43
Location: Mansfield. Victoria
drmini in aust wrote:
My no-name kits had 1 spacer 5 thou too short, and one 3 thou short. I found a 3 thou longer one in my collection but had to machine a 5 thou longer one from steel tube. Luckily I have a lathe.

You only want around 1 thou preload when hub nut is fully torqued up.
If you run them with too short a spacer the bearings destroy themselves quick smart from excessive preload.
These aftermarket bearings seem well made, pity the supplied spacers are often too short.


I checked flanges and found one has a lot of wear on the pressure surface and the other does not.
I placed shim material between the bearing surface and the spacer and it was about 30 thou before the grinding noise stopped. this means the spacer is very short i guess.will get new flanges anyway and it is probably cheaper for me to get a set of timken bearings rather than send them out to be done.

_________________
1978 Leyland Mini 1275 LS
Hi Ho Silver and hopefully away


Top
 Profile  
 
 Post subject: Re: Disk Hubs
PostPosted: Sun Nov 25, 2018 5:06 pm 
Offline
848cc
848cc
User avatar

Joined: Fri Jul 21, 2017 1:14 pm
Posts: 303
Location: Branxton, NSW
Yep probably best to get new flanges and timkens if you don’t have the means to make new spacer yourself. Much easier

_________________
1972 Mk3 Mini 1000, 1150cc supercharged.
https://www.ausmini.com/forums/viewtopic.php?f=3&t=95872


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 10 posts ] 

All times are UTC + 10 hours


Who is online

Users browsing this forum: No registered users and 29 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  

© 2016 Ausmini. All garage work involves equal measures of enthusiasm, ingenuity and a fair degree of irresponsibility.