SF1 Brake Plate (Drum)

[Franc]

Evening everyone,

starter clutch sorted thanks to all the advice. Now onto the brakes.
Done a full strip and clean bit of rebushing to do, easy enough came across a crack on the front of the rear drum plate and once fully clean can see on the back clearly Don’t know whether this is a common occurrence..?

Spoke to a local engineering place who have a guy who is a specialist on welding aluminium and other non ferrous metals - they have done similar work and don’t envisage it being a problem. Anyone any experience of this.


Franc

 

[DavidH]

Franc,

I wouldn't go near a repaired brake late no matter how well it is repaired, but more so where the damage is structural.
If it was cosmetic maybe, but your photo shows damage around a brake shoe pivot.
How much do you value your life ?
Other will disagree I'm sure.
There are brake plates advertised from time to time, wait for one to come up.

 

[piranha-bro2]

Don't agree. It's a rear brake plate so it's never going to be a life threatening issue if it does 'fail' - and I'm not sure it could fail in a dangerous way regardless. If professional alloy welding or even better, laser welding, can repair something as structurally stressed as a crank case or cylinder head, it will be more than capable fo repairing a brake backing plate that is only responsible for transmitting pressure from a human foot. Would I weld a crack in the alloy carrier for a front disc rotor? NEVER ... completely different kettle of poissons.

Having said that - I would agree entirely that replacing it is a better option - not because it will save your life, but because it will be a lot simpler and will probably be a lot more cost effective. That's just my opinion.

 

[Dellortoman]

completely different kettle of poissons.

The Frenchies will probably correct me but I think if you're going full frog mode, it should be marmite des poissons

Although I'm a little perplexed at the cooking method. Who boils fish in a kettle?

 

[Dellortoman]

As for a repair to the brake plate. Drill a series of holes along each side of the crack and lace it together with tie-wire.
If you're handy at embroidery, with a bit of accurate drilling you could add a nice floral decoration.

 

[piranha-bro2]

BTW, the heading is misleading - you actually mention 'a crack on the front of the rear drum plate' - but the heading says SF1 Front Brake (Drum).

Et je pense que ta grammaire soit incorrecte, Cam. Une marmite DE poissons (pas 'des'). But I'm sure one of our native French-speaking friends will be along soon to correct us both!

 

[Paul Marx]

BTW, the heading is misleading - you actually mention 'a crack on the front of the rear drum plate' - but the heading says SF1 Front Brake (Drum).

Et je pense que ta grammaire soit incorrecte, Cam. Une marmite DE poissons (pas 'des'). But I'm sure one of our native French-speaking friends will be along soon to correct us both!

It would be " une marmite de poisson " but if you want to be cultural, try " bouillabaisse ". Apparently, French is my mother tongue but my mother spoke English.

Paul

 

[Franc]

I’ve looked around the obvious places and done the eBays in a few languages doesn’t look like an immediate replacement is to hand so am going to spend the 100 quid on the repair for now if only to put the thing back together, if one comes along I’d buy. Thinking that once repaired and tested with a full weight stamp on the pedal - if my new cable survives and the crack doesn’t reappear it’s got to be a temporary fix with a similar risk to the cable snapping...the front brake is is re-bushed with new linings and stops well.

Je crains que si le poisson est cuit dans ma bouilloire, du the et du cafe ne seront plus bons a l'avenir, mais la soupe peut est bonne dans la bouilloire et gagnera du temps pour les travaux d'aiguille.

 

[Dellortoman]

Je crains que si le poisson est cuit dans ma bouilloire, du the et du cafe ne seront plus bons a l'avenir, mais la soupe peut est bonne dans la bouilloire et gagnera du temps pour les travaux d'aiguille.

Er ... Yes. Not sure what fish, kettles and tainted coffee have to do with needlework though.

Idioms rarely make sense when translated to another language. I dunno what the equivalent idiom would be in French.

 

[Exmoor beast]

Evening everyone,

starter clutch sorted thanks to all the advice. Now onto the brakes.
Done a full strip and clean bit of rebushing to do, easy enough came across a crack on the front of the rear drum plate and once fully clean can see on the back clearly Don’t know whether this is a common occurrence..?

Spoke to a local engineering place who have a guy who is a specialist on welding aluminium and other non ferrous metals - they have done similar work and don’t envisage it being a problem. Anyone any experience of this.
View attachment 58768

Franc

Odd break- maybe someone has been heavy handed removing shoes with big levers? Get it welded
ltll be fine.

 

[Franc]

Got the plate welded on the inside actually because of the strengthening ribs In the back there is plenty of room to get some metal in there ...

This is apparently fine - the physics behind this means that when you apply the brake the shoes push against the drum surface applying forces in the opposite direction anyway you are not able to force the crack apart, mechanical advantage is with you as you are using a setup with levers. I have reassembled and it stops very well, we have a specialist who do bonding and re-lining for classics locally the eco friendly non asbestos re-lining Stuff works very well I dragged the brake to get some heat in after a bit of bedding in, better than previous.

Franc