Front brake shoe problem

Hello Alan, Think I'd err toward rivets, but no harm in bonding aswell. If you just use glue & it fails,..... could be a bit nasty. If you rivet, don't counter bore the friction material too deep, leave a reasonable thikness so the rivet head can't pull through, but I'm probably teaching granny to suck eggs there.

Regards, Tim

Previously Alan Throssell wrote:

Previously tim_gostling wrote:

Hello Alan, Think I'd err toward rivets, but no harm in bonding aswell. If you just use glue & it fails,..... could be a bit nasty. If you rivet, don't counter bore the friction material too deep, leave a reasonable thikness so the rivet head can't pull through, but I'm probably teaching granny to suck eggs there.

Regards, Tim

Thanks for your opinion Tim, riveting/drilling shoe linings is something Iâve NEVER done before. What you suggest is what I was thinking. I just wanted to hear what the forum would say.I will probably glue the loose lining back into position with clamps, leave to set before drilling and riveting. There are 8 rivet holes in each shoe so I guess it would be foolish not to fit 8 rivets to both shoes. I donât want to chances with my brakes!All advice will be gratefully received.Thanks, Alan Back "in the day" I always rivetted my own linings , as long as they are tightly clamped and work from the center outwards ,should not be any problem.

Can you get hold of the correct rivets, Alan? Don't bother just glueing, it won't hold. When the linings are bonded on, they should be using the same process as that which disc brake pads are bonded with, a very different process from glue which you or I would use. I have just had the same experience, on the rear drum of my Matchless trials bike, whilst riding around the lanes. The back wheel locked, and I could not even push the bike, let alone ride it home. Imagine that was your front wheel, locking up at 70 mph on German roads.... forget it. This is your front brake. Those shoes are 9 years old! I can't believe you are even asking this question! You have 2 weeks, so just buy some new ones, they only cost £25.

Ian

Previously ian_cordes wrote:

Can you get hold of the correct rivets, Alan? Don't bother just glueing, it won't hold. When the linings are bonded on, they should be using the same process as that which disc brake pads are bonded with, a very different process from glue which you or I would use. I have just had the same experience, on the rear drum of my Matchless trials bike, whilst riding around the lanes. The back wheel locked, and I could not even push the bike, let alone ride it home. Imagine that was your front wheel, locking up at 70 mph on German roads.... forget it. This is your front brake. Those shoes are 9 years old! I can't believe you are even asking this question! You have 2 weeks, so just buy some new ones, they only cost £25.

Ian

Riveting is not that straightforward either. You have to counterbore the holes to the right depth so the rivets are below the surface by the right amount. Also you need the right amount of lining thickness in the counterbore for the rivet to grip. You probably cannot do this with worn linings.

I understand Alan's wish not to replace efficient turned-to-diameter shoes with an off the shelf replacement which is likely to be less effective but I too fear that used, contaminated shoes are unlikely to bond safely and rivetting with a variable thickness would require experience and judgment...not to mention correct sized rivets and lining drill.

I fear that if time is too short, the only realistic answer is to put ready-made shoes in and get the originals properly re-lined. There might even be an improvement !

The hub in question is quite common. I see at least a half dozen at every auto jumble. Also the SLS brakes are still affordable. I have an embarrassing number of these because I buy boxes full of random parts. Surely someone in your neighbourhood has a wheel ready to go and can lend it to you.

Got a drum braked Commando front wheel sitting here - hub great, chrome starting to go. It's a pity it's a long way from Scotland to Essex.