Thank you for replying swoop223,
I have tried a couple of times to post a reply and I never see them again. I have checked the battery voltage to be 37.6vDC, but when I attempt to use the hydraulics I immediately get the error code 30. If I attempt to use the drive, I momentarily hear a high pitch sound and then it stops followed by the error codes 11 & 21. The battery voltage never drops below 36.5vDC.
I am going to purchase a drive board and try that.