Dump truck hyd..help

Well guys after messing with the air bleeder over and over and over ..now fluid level was on before. .so I strap myself to the dog box and had the bed raised to full lift I then opened the bleeder and air came out for seems like a minute or so ..let bed down fluid level is way down add 5 gal. Total but had to keep bleeding about 5 6 times til it just pushed nothing but fluid out problem solved. .I've had this Truck almost 10 yrs never had this problem. .

 

Yes cheap fix 30 bucks ..thank God. ..I was thinking the pump around home is 500. Then new fluid..so I was blessed. .thanks all for the help..