Yes, on this machine it is a 10mm bolt with a 10mm lock nut on the emergency lowering valve. Loosen the lock nut and back out the bolt and all stages of the mast will fully lower themselves to the ground (at a little bit of a slower pace then when the machine is operating normally.
I did notice today that when I push the mini lever for lower function like normal, I hear the hydraulic motor/pump run a little (which my other machines do also) and the mast still very very slowly creeps down. When I push the mini lever for the lower function very slowly though, for a brief instant the mast actually raises approx 1/4 inch and when I push the lever fully forward it's back to its very very slow lower creeping. The brief raise while slowly pushing forward for the lower function is repeatable.
Also, as I have mention before. Raise does not seem to be as fast as it used to be when the mini lever is fully actuated. Seems to raise a little faster when the mini lever is not at full throw for the raise function.
I'm going to try and see what kind of voltages I'm getting at the solenoids by back-probing them while working the levers. I don't know why but it feels like if its not something mechanical I'm thinking it almost feels like it's not getting voltage to lower at full speed, or it's requesting raise and lower at the same time (even though it doesn't sound like the motor/pump is running at a lift rpm function).