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international 300u hydraulics

H

henry h

New User
can I tap into the pressure and return hard lines from the pump for my end loader pressure and return lines? And witch line is witch?
 
No. If you do that nothing will work. The 300u has an open center hydraulic system which means there can only be one loop through the system. Tapping into the lines will create two loops, which means the oil will only go through the path of least resistance.
 
If you have only one valve for the hitch, there is a cover plate on the right front of the reservoir (under the seat) for additional valves. They can be stacked, but need to be IH valves for that series. Jim
 
ok thanks guys.Ok I have an extra block. can I hook my lines to it without having to use the lever on the block? rt now I have removed the block and I am plumed into the pressure and returns where it used to live and it only works if the rear hitch lever is in the up position and locked there.is that the most pressure I can get? the reason is my loader does not have a lot of roll back force.my loader has the valve body on it with two levers.also behind the block there are three ports pressure the return and there is also a small pressure port what is the small pressure port for.sorry for all the different questions ive just never messed around with hydraulics much.
 
The system on the tractor is not a true open center design. the safety regulator valve in the rear right corner (with the hitch lever out side of it) is controlled by a pilot valve system that dumps pump pressure to near zero when the valves are in their center position. When a valve is moved the pilot valve shuts off the dumped pressure and sends pressure to the valve stack. The open valve then gets the output of the pump (limited to pressure relief of about 1200 to 1300 PSI.) Any valving put on the tractor must be compatible with this control system. A regular remote valve stack is not compatible. Your best solution is either 2 IH valves and termination plate put on the front mounting point with IH piping to it, or a front mounted hydraulic pump powered by the crank shaft through the crank hole. Jim
 
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