Hello,

When driving on Low speed (with fully lowered platform), no problems were observed.
When driving in Hi speed (with fully lowered platform), the left rear wheel seems to be blocked on forward. On reverse, it seems that is moving, but struggling. No issues with the left wheel.
The brake is releasing.

I checked the diodes at the hydraulic tray, seems OK. Then I have disconnected the cable of the coil of the Speed B valve, and the platform was driving on LOW speed only, no matter the position of the toggle switch, with no issues with the rear left wheel. Then I swapped the valves from the other lift I have, but nothing changed.
So, could you give some advise and what could be the problem.

Thank you in advance for your help.