Hello, I just acquired two MPW060LEN24T2748 used pallet trucks but I have not been able to make them work properly. One pallet truck does not lift, it only beeps when pressing the lift buttons. Everything else works correctly. The other pallet truck has battery problems which I have yet to check them aswell as they do not charge properly either. If anyone could send me an electrical manual or parts manual or have any idea that can help I would appreciate it, thanks.