753L lift cylinder rebuild re-install info needed

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zalmaflash

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Joined
Nov 17, 2013
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My Bobcat 753L had a lift cylinder blow a seal. I removed both lift cylinders and took them both in for a rebuild at a Bobcat dealer. Should get them back in a couple days. Here is my problem. When I get the cylinders back they will of course be empty. At the same time I would like to clean the hydraulic filter inline at the tank bottom,, and change the hydrostatic fluid. (Hydrostatic fluid is original)(never been changed) So I will have an empty hydro tank, air in the lines, and new fluid to add to the tank. I assume - fill the tank, start the engine, operate the bucket, lift, and drive forward and reverse and top off the tank as needed. OR Is there an air bleed process different than that? Any and all advice will be greatly appreciated. Thanks in advance.
 
Here's the procedure I use after a complete hydrostatic/hydraulic fluid drain.
Jack the machine up and block with all four tires off the ground
Start the engine and run at no more than half throttle
Move the steering levers forward until wheels turn smoothly
Repeat with levers rearward
Stop engine
Lower machine
Check fluid level
Start engine again
Drive forward at half throttle while raising, lowering and tilting bucket with out hitting limits
Shut down and let sit for several hours or overnight to let air settle out
Check fluid level
Repeat the driving and using bucket until it operates smooth
You can use the machine at this point but it may take several hours of usage to work all the air out of the system.
 
Here's the procedure I use after a complete hydrostatic/hydraulic fluid drain.
Jack the machine up and block with all four tires off the ground
Start the engine and run at no more than half throttle
Move the steering levers forward until wheels turn smoothly
Repeat with levers rearward
Stop engine
Lower machine
Check fluid level
Start engine again
Drive forward at half throttle while raising, lowering and tilting bucket with out hitting limits
Shut down and let sit for several hours or overnight to let air settle out
Check fluid level
Repeat the driving and using bucket until it operates smooth
You can use the machine at this point but it may take several hours of usage to work all the air out of the system.
OldMachinist thanks for the info, I didn't want to do anything wrong to it. 18 years and 800+ hours on the farm, a new set of tires, a new set of points on the bucket, and that one seal is it. General maint. of course, been a great farm hand.
 

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