'94 Bobcat 843B - AIR LOCK?? HELP!

[85chevyman]

Hey guys, new to the site as well as working on my Bobcat! Starting a business and still learning..

The problem is... we had an oil leak coming from the belly pan. So we stripped the skid plates and replaced a hose (diagram says it might run to a cooler). We thought this was the leak, then we realized the hydraulic sensor was leaking as well, so we replaced it. (Realizing thats why our hour meter stopped before hand and the hydro light was on). WHEN we were replacing the hydraulic hose, we had accidentally turned it on to move the bucket. Realizing the hose was off we turned the machine off. NOW the down movement on the boom and the curling of the bucket wont work; and the up boom and down on bucket are inconsistent.

I have yet to learn about hydraulics in depth, is this an air lock? Is an air lock possible? What solution is needed here? Any info helps, thanks all!! -Wesley

 

[85chevyman]

Well..... I feel like an idiot! I learned that they cant air lock. And my problem was..... my auxilary lever was locked over. Therefore all the pressure was in the auxilaries. Knocked the handle back into normal position and everything is fine! Wow...

 

[SSdoxie]

Well..... I feel like an idiot! I learned that they cant air lock. And my problem was..... my auxiliary lever was locked over. Therefore all the pressure was in the auxiliaries. Knocked the handle back into normal position and everything is fine! Wow...

Glad you got it figured out. What happened was the main relief opened with auxiliary stuck on and dead headed, this caused equal pressure to both sides of lift & tilt when you tired to function them. With equal pressure on both sides of the cylinder, the base end has more surface (thus more force) so the rods extend but will not retract.