I have 2010 hino 268 with 300k M , I changed the head gasket for my truck .. everything is in place, but I do not know why the truck does not work, it seems to me that the problem is not getting fuel into the engine,
It could be a lot of things. If you suspect no fuel, crack a fuel line at the injector and crank it several times until you
see fuel running out. Make sure you re-connected the camshaft sensor when you had the head off,and double check your timing. Good luck and report back if you get it running.