Thanks for the replies!
It's model FGC35. It also has "TOYODA LOOM WORKS" on another decal at the roll cage. I think it's a restored classic....maybe from early 80's with inline 6.
I will try the full lift deadhead again. I did that but only once. Will try several times as suggested. There are no screws at tops of cyls at all. If i have a bad accumulator, i'm sure it's not fixable. Must be a huge spring inside there, like old brake accumulators on GM trucks?
Will check tomorrow if I can dig out from the snow storm!