OK - I am a total "virgin" when it comes to these dump trucks. And these are going to sound like dumb-@ s s questions but I'm a big guy and can take the flogging

When I bought the truck the owner "assured" me the dump worked perfectly but needed fluid in the piston or resevoir.
I've read on this forum the procedures to fill the lift cylinder either exteneded first or pumping it in with the bed down - I'm hoping for the later option

Deal is...once I check/fill the lift cylinder...
Q. What the heck do I do to get the bed to go up and down
doh! And where does the PTO come in?Q. Can someone please describe shifting the 2-speed rear end?Q. Is the transmission be synchronized or do I need to double-clutch? I only ask because it doesn't want to down shift from 3rd to 2nd and am curious if that's an indication of a problem? Upshifting seems to be fine.BTW -
If I could find an operators/owners manual I might not need to ask such dumb questions 