Thanks for ALL opinions submitted.:)
I found Bush Hog's web sight and downloaded a PDF of my model of mower.(They have REALLY good parts schematics.) I will take the slider tubes apart and clean and lube and get some new plastic bearing parts ordered for them. I am impressed they lasted 10 years being a totally plastic bearing!!!
Probably a real good idea to run a guard. ;)(Even though none of our older ones had them.) JD,I am going to clean all of the grease off of the plastic tubes and just oil them lightly so the will slide. There is A LOT of grease that has accumulated in them in the last 10 years !!!! lol