tektro brake leak

mmbrajohan

I recently bought a used gt a avalanche with auriga comp brakes. I managed to bleed the none working back brake, but it is squealing badly. Maybe the pads got contaminated or just need replacing. It struggles to brake as well... But that's not the problem. My front lever got dislodged and the washer that sits behind the reach pin ball is now located outside the 'catch washer', if I could call it that. Mineral oil also started leaking from the cylinder/piston. Is there a way I can fix this leak? And how do I remove the catch washer to get the push rod back so the lever doesn't swing around?