16 replies to this topic

[paulrockliffe]

Trying to swap a Cooper S disc brake over, buggered it up at the first step.  Swapping them over because one of the studs has done it's splines, so I was able to put the stud in backwards, which stopped the disc spinning when undoing the big nut on the end.

 

Except the nut wouldn't budge and the lower caliper mount snapped off instead.  So new caliper needed.

 

Anyway, that nut is damn tight!  It's drivers side and I checked the Haynes manual, it doesn't say the thread is reversed or anything, so I was trying to undo it the normal way.  Any tips for getting it off?  I used a 2 foot bar that has never been defeated before.

[wile e coyote]

Cotter pin out?..... only joking...

 

The front hub nuts  are conventional - anti clock undo... no substitute for leverage - a bigger breaker bar needed it seems...done up to 180'ish so pretty tight .....

[paulrockliffe]

I'd have snapped the cotter pin if it was still in!

 

I'm tempted to just drill the thinner bits and smash it off.  I don't have a longer bar, so would need to find time to get hold of one.

 

So annoyed about the caliper!

[Cooperman]

Put 2 of the old studs back in and put a long bar between them to resist rotation.
Then with a long bar on the socket use a big club-hammer to free the nut. It usually works.

[panky]

Try drilling a hole in the nut and careful use of a chisel to split it, you might get away without damaging anything else, Either that or a length of tube on your cracker bar.

[cookie4343]

Remove centre cap from wheel and cotter pin from the hub nut, with the wheel still on and mini on the ground get your breaker bar on it and crack the hub nut.
Then just jack up after and remove wheel.

[Cooperman]

I thought he had removed all the studs.

[Magneto]

No one over there seems to have access to an impact wrench?

 

If you hadn't buggered the caliper, you could have driven it down to the closest shop and had them bang them loose for you........

[paulrockliffe]

I've still got 3 studs on, just the one had come out because it spun when I undid the wheel.  Sounds like I need a longer bar or to break the nut then.

 

I don't have an impact wrench, but next time I will take it to the garage!

[Ethel]

The less springy the bar is the better. There are plenty of cordless impact drivers about now, not forgetting the good ole hit it wiv a big hammer type, so you may be able to scrounge one or persuade a spanner monkey to stop by on his way home for a few beer tokens.

[dyshipfakta]

You can get a pretty decent plug in electric one from machine mart for about 50 quid. Will come in handy for other things.

[paulrockliffe]

I gave it another go tonight; jammed the brake on, put my 2' bar on then went to find something suitable to extend it with.  The only thing I could find was an 9' washing line pole, so gave that a go.

 

The brakes were full on, but rather than moving the nut the caliper moved on it's one remaining fixing instead.  And because the fixing was nipped up tight the aluminium casting cracked on that one too and the caliper fell off!

 

So I drilled one of the recesses, smashed a chisel into it, then used the chisel to tap the nut round and loose.  The nut and caliper are off now!  I guessed the inevitable outcome, so ordered a new nut this morning, but need to get another caliper sorted.  Progress I suppose!

[cal844]

I gave it another go tonight; jammed the brake on, put my 2' bar on then went to find something suitable to extend it with.  The only thing I could find was an 9' washing line pole, so gave that a go.
 
The brakes were full on, but rather than moving the nut the caliper moved on it's one remaining fixing instead.  And because the fixing was nipped up tight the aluminium casting cracked on that one too and the caliper fell off!
 
So I drilled one of the recesses, smashed a chisel into it, then used the chisel to tap the nut round and loose.  The nut and caliper are off now!  I guessed the inevitable outcome, so ordered a new nut this morning, but need to get another caliper sorted.  Progress I suppose!

Which disc size?

Link to the disc brake page on minispares.com

http://www.minispare...ers.aspx?040101

Edited by cal844, 10 December 2016 - 09:45 PM.

[paulrockliffe]

7.5" Cooper S brakes.  

 

Does anyone know if the Minispares calipers are as good as the 'Genuine' AP ones that are twice the price?

[cal844]

7.5" Cooper S brakes.  
 
Does anyone know if the Minispares calipers are as good as the 'Genuine' AP ones that are twice the price?

They are copies and are very good according to posts on here