6 replies to this topic

[croc7]

Haynes says 3 mm, another earlier Haynes says 1.5 mm. The orange factory manual, 1.5mm. All measured at the thinnest point. ???

[unburntfuelinthemorning]

No point going that thin really, they're very cheap to replace.

[Spider]

Is there even as much as 3 mm on them when new ?

1.5 would be quite an OK change point.

[gazza82]

Before they get to the rivets .. otherwise you need new drums!

("The brakes aren't great, so anticipate your braking" said the seller)

[croc7]

Thanks all for the information.  I had a spare set of brake shoes and it was time for the annual winter maintenance checks anyway, so I went ahead and changed them.  i could have left them installed as there was plenty of material left.  The newer type springs were really stout and were a bugger to get off.  Had to use a pry bar on the upper.

 

Which brings up a question, isn't about 70% of each of the rear mini brake shoe in contact with the surface of the drum?  I mean to say, looking at the installation, they are pushed outward by the brake cylinder and more or less 'pivot' around the adjuster end?

Edited by croc7, 04 December 2022 - 01:07 AM.

[Bobbins]

If they're adjusted correctly you maximise the contact patch because the pivot end will be closer to the drum surface.

Also make sure the shoes are the right way round, I've just stripped a set of rear drums with incorrectly oriented shoes, it's not unusual.

[croc7]

Makes perfect sense, now that I think about it. Thanks for the reply.