ZTRAC John Deere 757 Question

[Rmiller1952]

i have a ztrac 757 John Deere mower and I had a hydraulic pump failure. I swapped it out with another hydraulic pump. The mower and pump works when it's on jacks but once I put the wheels back on and place it on the ground the pump and mower does not work. Does the pump need some adjustment and how do I make these adjustments or could it be some other issue like a plugged filter?

 

[KennyV]

WELCOME to LMF...from another KANSAN..
Open and fully close the bypass valve with the system pumping...
That is the valve used when you are towing or moving it without having power... :smile:KennyV