
Re: Handbrake adjustment/pad replacement (disk brake motor)
More than one way to skin the cat, as far as working on disc type handbrakes, it seems.
Just for fun, here's another one...
First make sure that the cables are working freely and are correctly adjusted.
It's not unknown for one or other of the cables to be so stiff in operation that it won't return easily to the 'off' position.
This applies most often to the n/s one, especially if the bracket is missing which prevents the cable making contact with the exhaust.
With the handbrake lever in the 'off' position, the 4 levers which bear on the handbrake pads should 'just' be in contact with their stops and the amount of thread projecting on each cable end should be equal within 5mm.
Once those adjustments have been made, the only time you should need to alter the settings is to take up any slack in the cables if/when they're stretched after years of use.
To gain access to the pads, undo the 4 x 14mm headed bolts which lock the adjustment eccentrics in position, then swing the levers upwards out of the way.
The eccentrics and bolts can be removed for cleaning and greasing with the levers still attached to the cables.
To 'persuade' the worn pads out of their housings, an old feeler gauge ( about 20 to 25 thou/0.5 to 0.6mm, with the end bent over slightly, can be pushed down between the pads and the discs and used to lever the pads out.
When installing the new pads, always make very sure that the pad is offered in at a slight angle, so that its 'leading' edge makes contact with the small anti-rattle spring which sits at the back of the housing.
If that's not done correctly, the pad won't be able to sit flat against the disc.
Not only will the efficiency of the handbrake be lower, but the friction material will be worn at an angle.
Almost forgot to mention that it's worth getting hold of a cranked 14mm ring spanner to go with that cut-down 24mm ring spanner which you'll be using to adjust the eccentrics.
Something like this would be ideal, the shorter the better as there's not much clearance under the heat exchangers, the offset or crank in the spanner means that it's easier to fit it onto the 14mm head of the 9mm bolt...
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http://cgi.ebay.co.uk/SNAP-ON-13mm-x-14 ... _500wt_949 >
Leave the handbrake lever in the 'off' position and whilst rotating the road wheel, gradually turn an eccentric in the direction which brings the pad into _light_ contact with the disc, then lock it in place with the 14mm headed bolt.
Repeat for the other 3 eccentrics, then pull the handbrake lever on hard.
Now check how far each operating lever has moved off its stop.
If you're lucky, they will each have moved around 3mm, but if not, the actual distances that they have moved will give a direct indication of which eccentric is too slack and which is too tight.
Release the handbrake lever and after making the appropriate small adjustments of the eccentrics, pull the handbrake on and once again check those gaps between the levers and their stops.
If it all goes well, you should have a handbrake which will lock both front wheels hard after '5 clicks' movement of the handbrake and you'll also be wondering why those tales about disc brake type handbrakes being poor could have gained any credibility...
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