VW beetle brake problem

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VW beetle brake problem

I am posting this on behalf of a friend in USA. Any suggestions to point to the problem are welcome.

Quote:

''My 70 bug brakes (I own 2 bugs as well as my Westy)
work fine, all redone with new hoses etc., except
for one thing. I did not replace the master
cylinder. Now when I use them, the car will have
brake drag unless I reach down with my foot and lift
the brake pedal up the last 1". Then there is no
drag. The pedal does not appear to be returning that
last 1" of travel to the top. If I do it manually,
it will work fine. I would appreciate any clues on
this? Is there a return spring in the MC that is
tired and needs to be replaced? This is what it
seems like.
Thanks for any help on this, it's weird. The brakes
work great other than my "built in" hill holder. :-)

Courtney''

End Quote.

Thanx!!

Gari.pk User 2067 asked on 24 Jun 2010 15:38:56 pm

1 Answer

303 views |

Arham - on 24 Jun 2010 15:39:14 pm

Replace the Throw rod for the MC. A shorter rod should remedy it just fine.

The master cylinder piston must fully retract. If the master cylinder piston is not allowed to fully retract when the brake pedal is not applied, the primary inside seal will not return past the small pressure relief hole (visible within the master cylinder reservoir on some master cylinders). This can cause excessive residual line pressure and contribute to brake drag and an overheating. So you either repostion the master using washers to take up the slack or use a stronger return spring.

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