Posted 17 January 2010 - 10:25 PM
It is either the slave cylinder seized or the plunger in the clutch housing. if you unbolt the slave, slide it off the small rod, then check if the pedal goes down. Do this carefully/slowly, if you press to much the piston could pop out of the end!
If the pedal moves the slave is ok, it is likely the plunger has seized, try squirting WD40 on the shaft in the centre and working the arm back and forth until it fress up. If the pedal is still stuck, you need a new slave or rebuild kit.