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Bent Brake Disks ?

To: mgs@Autox.Team.Net
Subject: Bent Brake Disks ?
From: as@boris.umds.ac.uk (A.D.Smith)
Date: Wed, 6 Aug 1997 17:09:32 +0100
Having finally got my carbs rebuilt after about 3 weeks off
the road, I was driving home the other night (well OK, 
morning), when I noticed a pulsing through the pedal every
time I applied the brakes. Fortunately, even in London, 
there's not much traffic around at 5:15am, so I got back home
without using the brakes over much.

I had a look at them the next day, to find that the pads were
pretty worn, so slipped in a new set. This just seemed to 
make things worse, to the point that the pulsing of the 
pedal was pretty strong, and certainly not to be ignored.

The other symptom is that after setting off and driving a 
couple of tens of metres, the brake pedal almost hits the 
floor the first time you need it, then bites OK on a second
press. 

My diagnosis is bent disks, pushing the pistons out as the
disk goes round, meaning that I need massive pedal travel
to get the pads back in contact with the disk when I need 
the brakes, and causing the pulsing force on the pedal.

Could it be anything else ? Or am I right in being resigned
to having to pull it all apart again to put new disks on ?

I've done about 25K miles on the current disks, and can't 
(by eye) see any wobbling. Could be that some part of 
the disk is thicker than another ?

Any clues ?

Andy

**************************************************************
Andy Castellano Smith.            | a.d.smith@umds.ac.uk
Computational Imaging Science.    | http://www-ipg.umds.ac.uk/a.d.smith/
5th Floor, Thomas Guy House       | tel. : 0171 955 4223
Guys Hospital, London SE1 9RT.    | fax. : 0171 378 7480

       1977 Chrome Bumper Midget "Mungo" for short.
DPO of 1975 Rubber Bumper Midget "Mary"  for short.
**************************************************************

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