Loosen the bleeder screw on the slave cylinder and allow it to gravity bleed, with the cover off the master. DO NOT pump the pedal while you do this and make sure you don't allow the master cylinder to get run dry. Watch for bubbles coming out of the slave when you are getting a steady stream or steady drip, no air, tighten the bleeder. Now fill the master to the proper level, some have a full line down in the reservoir, put the cap on the master and try the clutch, you may have to pump the pedal a bit, maybe a dozen or two times, to get the clutch to work right. I've done it this way, lots of times, on all kinds of vehicles it seems to work for me. If it won't gravity bleed you may have to get a piece of clear plastic line that will fit snug on the bleeder and try to syphon it. Use clear plastic line so you don't get brake fluid in your mouth, you can see the fuild coming. You can buy that line at most hardware stores I suggest about 6 feet or so.

Yes it needs bled. You can get some air out by letting the line run before the slave. There has to be some sort of bleeder on a slave cylinder. Also check to see if it is hydroboast assisted. was pressure plate also replaced? Weak or sticking pressure plate would cause simular problems