Hence the caution to not park uphill when raising the cab. This truck has no mechanical uplock, only the hydraulic controls hold it in place
On level ground it goes past the balance point when fully raised, but only by a little. If you set the hydraulic controls to the lower position, you can walk to the front and push the cab back over the balance point by hand till gravity takes over to finish lowering the cab.
Do not work on the hydraulics with the cab raised without installing a safety brace... how to brace the cab to perform, say latch maintenance, is in the manual... if the cab is near or over the balance point, it does not require much of a brace to insure it stays there...