Bobcat 753 hydraulic tank

[.50ae]

Hey guys new to the forum. Had this project 753 for a week or so now. Got the cylinders all repacked but the hydraulic tank had water in it and the oil is milky. I want to flush the system before I connect the cylinders. Which one of these is the return for the hydraulic fluid? I want to disconnect it and run the machine to try and flush out the contaminated oil.

 

[reaperman]

Some people have used the auxillary connection on the front of the machine to flush the system. They start the machine and power the aux and use an open-ended hydro hose and pump the old fluid into a bucket. When the pump/oil starts to sputter, they quickly shut the machine down. I may be wrong, but at the same time I think I recall them using a return hose to draw the new oil back into the system at the same time. Otherwise, they would just fill the hydro tank with new fluid. Do a search on here you should find the answer.

 

[.50ae]

Some people have used the auxillary connection on the front of the machine to flush the system. They start the machine and power the aux and use an open-ended hydro hose and pump the old fluid into a bucket. When the pump/oil starts to sputter, they quickly shut the machine down. I may be wrong, but at the same time I think I recall them using a return hose to draw the new oil back into the system at the same time. Otherwise, they would just fill the hydro tank with new fluid. Do a search on here you should find the answer.

Will do. Tried pumping out the old stuff in the hydro tank and adding a gallon of new but It turned milky again when I turned the machine on. Guessing the old stuff in the rest of the system piped back in and mixed with the new

 

[Dave the Ozzie]

The large hose is the suction and return is teed into the suction hose behind the pumps. The small line is the return/bleed-off from the drive motors.