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Message: <blockquote data-quote="Tazza" data-source="post: 2854" data-attributes="member: 82">How long does it usually take for the hydraulic/hydrostatic system to bleed its self?As some of you know, i have been working on re-building a 743, the tilt cylinder is not on yet, but the rest of the hydraulics are attached. I re-built the rams, so they were both empty and all the hoses and tube lines were also empty.I have re-built cylinders on other machines and i'm sure it didn't take this long to get the air out. I lift and drop the arms a few times, drive around a bit and lift and drop the arms a bit more. The oil is still foamy and you can hear and feel the air as the pump groans and the arms jitter while lifting. Yu can see the foam through the sight glass on the reserve tank after you give it a bit of a run.There are no suction line filters, so it can't be a restriction from a filter. There are no oil leaks so i'm pretty sure its not drawing in air from a loose fitting...... The hose clamps on the tube running from the port block to the pump are tight and not leaking so i suspect its not sucking in air here.The only other thing i can check is the charge pressure, but with air in the oil, i'm pretty sure it won't give me the answers i'm looking for....Any ideas? or does this seem normal? all i can do is keep running it and see if it will purge the air on its own. The system really was bone dry, hydro filter, pumps, motors, oil cooler, ALL lines and cylinders were empty.</blockquote>

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