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Out of stroke error is caused when the leveler leg extends its full length and the front forward controll doesn’t see any change in degree of level
Use blocks under the leveler legs to prevent that error
The buzzing sound would most likely be the dual polarity solenoid located on the hydraulic pump motor.. it’s usually an indication of low 12 vdc supply to the system
.. bad batteries
.. dirty or loose connections
.. battery cable to chassis ground not good clean metal to terminal end
.. if you never upgrade the OEM factory 50 amp resettable DC breaker that supplies power to the dual polarity solenoid and pump motor this could also be your issue
Anyway.. some typical items I would be looking at
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