The sealing washers are probably work hardened and are no longer soft enough
to make a good seal.  Replace them as they are ideally one use items.
That's why you get a new one for the oil plug when you buy an oil filter.
In an emergency you can remove the sealing washers and heat them with a
propane torch, allowing them to cool without quenching.  This will restore
the softness of both aluminum and copper sealing washers and allow them to
seal without excessive force.

Ed

  On Tue, 2 Oct 2012 16:02:38 -0500, JRodgers <jrodgers113@GMAIL.COM> wrote:

>PS pump is leaking at the washer where the hollow bolt passes through
>the banjo fitting on the pressure side. I made sure the bolt IS NOT
>loose. So I need to do something. Any suggestions?
>
>Thanks,
>
>John