Hydraulic help needed

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  • I have a question on a hydraulic system particularly a braking manifold on a hydraulic motor. This is one of my stump grinders that has developed a problem and I have never seen a braking manifold and looking for suggestions before I just start replacing everything. If anyone has some knowledge here let me know please. What is happening is when I engage the motor it is not getting flow and deadlocking and wanting to stall. I have torn the motor apart and it's fine, also all other hydraulic movements work except the motor. See the attached diagrams, as stated the cutter head motor Fig 2-2 will not turn and I am thinking the braking manifold Fig 5-5 is the culprit either the electric solenoid or a stuck valve.

  • Well, lot of places that system could fail.


    The messy redneck method to be done outside would be to crack lines.


    Assuming the cutter head rotates freely...

    I would crack the hydraulic return of cutter head motor to check hydraulic flow.


    If good, problem is down line from there.


    Not much help, but it's a start.


    Solenoids click when energized. Maybe use a jumper to energize the solenoid with the engine off.

    Slingshot Flyer! Well, of course it's red...