How to bleed hydraulic system on 763? Hydraulic tank was emptied and hoses to both hydraulic drive motors removed. Installed new wheel bearings inboard and outboard. Also 4 drive chains. New case drain filters also. Sometimes pump is very noisy. It this cavitation? Sometimes one side may drive, but then other side seems locked up. Boom / tilt no issues.
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North Idaho Wolfman
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- Jul 16, 2015
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You don't have to bleed the hydraulic system, it's self bleeding.
The reason I ask is that the bobcat was running great before I started working on it. Now the left side may drive forward for 1 or 2 revolutions. But when trying right side it appears locked up. Hydraulic pump is very noisy. When coming back 20 min later, right side may drive but left side appears to be locked. Any thoughts!
tt
SkidRoe
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- Dec 10, 2009
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How is your charge pressure? Is it only one drive motor? Could be a motor issue
The reason I ask is that the bobcat was running great before I started working on it. Now the left side may drive forward for 1 or 2 revolutions. But when trying right side it appears locked up. Hydraulic pump is very noisy. When coming back 20 min later, right side may drive but left side appears to be locked. Any thoughts!
tt
2 hydraulic motors: 1 for each side. Machine was running no broblems before I changed wheel bearings and drive chains. I have no idea where and how to check charge pressure. Was thinking about removing brake solenoid to see it both sides will drive.
Some problem are solved but not sure what corrected it. Removed brake solenoid and everything is fine Now to figure what that wasn't being energized. Went thru resistance check on solenoid and ok. Had already swapped relay! Next thing I know it works. But there is another problem. Engine coot temp climbs at times! Bew thermistat and sensor. As soon as temp show yellow hydraulics disconnected thru BCIS. Engine is not overheating. Indication only issue. 5 min later temp comes down. Believe it to be wiring or BCIS issue!
