I am John Mc, a Ford dealer technician.
I hope I can help solve your problem quickly and accurately.
To bleed the clutch in the truck you have to take the slave loose from the transmission and hold it with the line straight up. Now you pump the slave push rod to get the air out. I am posting the procedure from the Ford manual to further assist you.
Click here for instructions
If you have any more questions please feel free to ask, it's what I'm here for!
important to me so please leave accurate feedback for others to see my job performance.
I understand this, if you read the procedure in the link it describes how to do this. The air will bleed up through the lines and to the reservoir.