Kubota m4900 no hydraulic s after replacing hydraulic filters

This is a quick troubleshooting clip, not a tractor overview: an M4900 owner loses hydraulics, lift arms, bush hog control, and power steering after doing an oil change and swapping hydraulic filters. He explains the cause (air introduced into the system) and shows the fix, loosening four bolts on the hydraulic pump near the motor and cranking the engine with the e-stop pulled until oil purges out. Useful mainly for M4900 owners hitting this exact post-filter-change symptom.

Posted by the aubrey brazwell channel, an owner sharing a real hands-on fix from their own maintenance mishap.