hi folks , got a D1 300 tdi . the clutch pedal hit floor while changing down ,. its had a new slave and rubbers in the master . fluid flows to the slave ok but the pedal doesnt return or build presure

Try a new master you can put seals in it but if the piston is worn then your p@ssing in the wind

Yeah, best to change both cylinders. Its a pig of a job to bleed sometimes, I had fun n games doing mine. I tried normal, pressure, reverse n swearing at it bleeding and still could not get much pedal. I also tried the trick of holding the clutch pedal down all night, but in the end I got there with the pressure bleeding. Took many attempts though. Have a search, lots on here about it.