[AMRadio] Suggestions for restoring a DX-100

[Donald Chester]

  I would have to disagree with some of the above. The reason
> > : you see lower fluid levels in the master cylinder is caused by brake 
>pad/shoe
> > : wear. As the pads wear, the caliper pistons have to move further out 
>in their
> > : bores to effect braking. This takes more brake fluid..........VOILA, 
>lower
> > : levels in the master cylinder. ANY leak in the brake hydraulic system 
>(however
> > : small), would introduce AIR into the brake system. This would bring 
>about
> > major
> > : problems very
> > : quickly.
> >
> > You never 'bled' the brake lines, to get the air out?
> >
> > where did the fluid go?

Remember we are talking about OLD cars.  I think they quit putting PCB in 
brake fluid sometime in the 60's or 70's.

I have observed fluid residue on the lines and on the surfaces of master and 
slave cylinders many times.  Even if the lines don't take in air, small 
amounts of fluid can creep out.  It seems to penetrate like WD-40 if there 
is even a miniscule crack.  Think of the millions and millions of cars on 
the road ever since the advent of hydrolic brakes.  How many of them were 
perfectly or even properly maintained? It is not uncommon practice to just 
keep adding fluid as long as that keeps the brakes working well enough to 
stop the car.  People tend to put off major repairs until a catastrophic 
failure occurs.  I suspect the amount of PCB that has leaked into the 
environment from automotive brake systems far exceeds the total leakage from 
electrical equipment many times over.

Don K4KYV

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