Hello, during routine maintenance today, the bronze tube slipped out of the printhead. How can I reattach it so that it doesn’t slip out again?

Hello, during routine maintenance today, the bronze tube slipped out of the printhead. How can I reattach it so that it doesn’t slip out again?

There are two small bolts which overlap the bushing slightly to hold them in. Also what is that crap all over the rods? They are graphite bearings and should only ever be lubricated with a light machine oil, NOT GREASE of any kind