[hypoxia]

When my accumulator failed my tag tires would not remain straight backing up. 
I drove it to Newell, they determined the TAG system had no pressure and could not find any signs of a hydraulic leak. They charged the system and sent me home. I was back at the factory in a few days. This was the beginning of the discovery of the life limited pressure accumulator bladder …. The rest is hi$tory…

It's interesting that you lost pressure.  I suppose I should add the pressure gauge with the Minimus fitting to a spare parts box.  Pretty soon I'll have to add a trailer for all of the spare parts.