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staticattic

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Reply with quote  #1 
Yesterday I installed front discs on my '68 Std. On the driver's side, the inside pad is rubbing against the disc. Is this something that will "adjust" when I drive or is this something I should worry about? I checked the spindle nut to make sure it was not too tight. I tightened it until the wheel had no wobble, then loosened it just a hair, as per the instructions. The passenger side doesn't rub at all.

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Jeff
72 Super Beetle
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kafertoys

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Reply with quote  #2 

It should adust itself.  Before you drive it make sure you press the brake pedel till your brakes feel good. I like to spin the wheel while its jacked up and have someone step on the brake a few times just to check thing out first.


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Ryan

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Reply with quote  #3 
Give it a couple of trips around the block to see if it's actually binding or just touching.  The pads will touch the rotor slightly from time and are more likely to do so when not under the stress of driving.  On the other hand if the pads are actually binding and not retracting, then you may have a sticking piston in the caliper.  If it's a new part, send it back.  If not, then a rebuild may be in order.  --Ryan
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olspeed

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Reply with quote  #4 
This is just a thought and may by some of the other people on here might know for sure, but I installed discs from a late model Ghia on my old 69 Baja,(this was about 1978) and was told by the local VW guru to pull the check valve on the master cylinder out. I just checked my Robert Bentley Manual to see what they show,and they list them as residual pressure valves,and they hold a small amount of pressure in the line to make the drum brakes react quicker. I was told that this will hold enough pressure in the line that the pads will drag on the disc. The pads are suppose to ride up against the disc but there should be no pressure on the pad until the pedal is depressed. I checked on my 76 bug and found that there was none of these valves on that master cylinder, I then checked my Bentley manual for late years Beetles and found that they were no longer used after 1974 and that a different master cylinder with restriction drilling's and they are not to be used with disc brakes. I don't know what your instructions say with your kit,but you might want to look at your master cylinder and make sure that it has the check valve removed or if there is no check valve on either hole then check to see if it is marked. ( countersink in the mounting flange for the drum brake master,and a V-notch on the side of the mounting flange for the disc brake master) Like I said I don't know if this is a problem with the new kits out there but if it doesn't align up after driving it for a short distance I think I would check this out.
Olspeed

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68autobug

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Reply with quote  #5 
 
Over the years many cars with disc brakes
used to have that problem of the pad resting against the disc
and if You jacked the wheel up the wheels would never spin...
 
Most Beetles in Australia had Disc front brakes since 1968
and mine are working perfectly.
 
My car will roll on any surface, so there is no pad rubbing..
 
maybe there will be some binding with New brake pads??
 
did you push the pads [ and pistons] away from the disc
when you installed them?
 
other than that, there isn't much you can do
 
unless the valve mentioned iS keeping pressure on the pads..
 
Lee
 
 


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68autobug

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Reply with quote  #6 
 
I had a renault R10 back in 1970 which had 4 wheel disc brakes...
a very uncomplicated basic system..
 
I was told the front wheel bearings were supposed to be slightly loose
so they would help pull the pads back off the discs...
 
I've never seen a disc brake caliper with springs to pull the pad back... lol
 
some pads rub and some don't...
I think its all to do with the caliper
some have rubber rings that are supposed to pull the piston back slightly..
 
Lee
 
 
 

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68autobug

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Reply with quote  #7 
Hi
I had My Renault 10 back in the 70s...
I do however have a never used ball joint
although they aren't like other ball joints , they are a rubber mounting....
I am locked in Australia..
You may have to go to Europe to find parts??
or the UK.....??

Lee  in Australia


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