My age 608 days before the truck from the diamond Lassa to half sand discharge hydraulic gear pump shell rupture, with a few days and similar problems for a new pump
According to your description, it should be the system oil is not smooth, resulting in high pressure pump, more than its capacity, causing the shell rupture
Mine is the King Kong 716 gear pump that keeps shaking...... Add three pads to the decibel gas and it explodes...... You can't get up without padding.
It's possible that your hydraulic oil is dirty. Something went into the reversing valve, and it was jammed
