TheOldHokie
Well-known member
Lifetime Member
Equipment
L3901/LA525, B7200DT/B1630, G2160/RCK60, G2460/RCK60
Tractor hydraulics is not rocket science. You will quickly get the operation of that clear in your head. All you have to do is watch how it works on your new tractor.The front of the tractor has kind of like a tube cut in half where the loader slides in to it. The back is the only spot where there is a clamp system to hold it in place. I am in no way a tractor expert this is my first tractor. I can fix just about what ever is in front of me. But knowing where hydraulic lines need to go forget it. Unless they are already hooked up and just need replacing.
The valves are all daisy chained together on the pump discharge line:
(PUMP -> IN -> PB -> IN -> PB -> IN -> TANK).
Each valve in the middle of the chain has an additional tank return that only gets used when the valve is operated. When the valve is operated the tank line is used to reroute the output from the cylinders or motor directly back to tank. That short circuits the PB chain back to tank and pump flow to downstream valves is cutoff until the valve is returned to neutral.
Get that concept clear in your head and you will immediatly understand what was happening when you had PB and T crossed at the loader valve
Dan
Last edited: