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General Bobcat Skidsteer Forum
843 hydraulic leak problem
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<blockquote data-quote="ajwgator" data-source="post: 8529" data-attributes="member: 226"><p>Hi guys, all is doing ok here in Kentucky execpt for the drought! Its been some time since I have been here since all has been going pretty good with my 843. Well until now... I developed a hyd leak on the retract side of my right lift cylinder the other day. I felt certain it was the hose since is seemed to be seeping pretty good at the lower end of it inside the engine compartment. I had one made, changed it, also discovered the extend line to the same cylinder in the engine compartment was chaffing two lines also. I removed it (line from the control valve to the extend hyd hose), rerouted it properly, and got my machine all back together.</p><p>Checked the hyd fluid, wasn't showing on the stick, added 2 gallons of John Deere hyd oil and started it up. I let it run for about 5 minute, ran the lift and tilt through some but didn't they didn't want to come back to neutral. I got out and was checking for leaks after my repairs. I found the fluid leaking from the back of the same cylinder into the engine compartment still. I shut down with the bucket lifted about 1/4 high, and tilted down almost full. I just assumed (you know what that means) I had a little bit more air in the system than I anticipated since I had both sides of the cylinder opened.</p><p>My lift cylinders are the old type with welded lines. I discovered that the retract line on the cylinder was not secured to the back of the cylinder. It looks as though the weld had been ground off for some reason either to repair it or change the hose like I had just done. I didn't remove the cylinder to change the hose. Anyway the line appears to have been brazed before and it is leaking at the bottom side where it would have been normally welded to the cylinder. I guess I will have to remove it and get all the oil out of it to braze it again. Has anyone ever tried to braze a leaking line on the cylinder with it still installed on the machine? I want to try it but not too sure if I can get enough oil out of it since it can't be removed from the cylinder.</p><p>Thanks for any input. Jay</p></blockquote><p></p>
[QUOTE="ajwgator, post: 8529, member: 226"] Hi guys, all is doing ok here in Kentucky execpt for the drought! Its been some time since I have been here since all has been going pretty good with my 843. Well until now... I developed a hyd leak on the retract side of my right lift cylinder the other day. I felt certain it was the hose since is seemed to be seeping pretty good at the lower end of it inside the engine compartment. I had one made, changed it, also discovered the extend line to the same cylinder in the engine compartment was chaffing two lines also. I removed it (line from the control valve to the extend hyd hose), rerouted it properly, and got my machine all back together. Checked the hyd fluid, wasn't showing on the stick, added 2 gallons of John Deere hyd oil and started it up. I let it run for about 5 minute, ran the lift and tilt through some but didn't they didn't want to come back to neutral. I got out and was checking for leaks after my repairs. I found the fluid leaking from the back of the same cylinder into the engine compartment still. I shut down with the bucket lifted about 1/4 high, and tilted down almost full. I just assumed (you know what that means) I had a little bit more air in the system than I anticipated since I had both sides of the cylinder opened. My lift cylinders are the old type with welded lines. I discovered that the retract line on the cylinder was not secured to the back of the cylinder. It looks as though the weld had been ground off for some reason either to repair it or change the hose like I had just done. I didn't remove the cylinder to change the hose. Anyway the line appears to have been brazed before and it is leaking at the bottom side where it would have been normally welded to the cylinder. I guess I will have to remove it and get all the oil out of it to braze it again. Has anyone ever tried to braze a leaking line on the cylinder with it still installed on the machine? I want to try it but not too sure if I can get enough oil out of it since it can't be removed from the cylinder. Thanks for any input. Jay [/QUOTE]
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