rain, dust, mildew in morning/night time, working pins, bushings, etc... with lots of force... can work things over pretty good.
greasing can make a huge difference, going from a gummy sticky state that can act like sand paper with dust gets in there and makes pins thinner, and wobbling out holes, to a nice slick surface, the lets everything move freely.
if you have a backhoe, and FEL.... hitting all the grease zerks can be daunting. 1 trip around the machine, then 1 more time around, hitting the zerks i missed, is normal thing with me. err i take that back. walk around once compeltely around it hitting all the zerks i can remember about / see. then adjust backhoe and FEL (makes easier to hit certain grease zerks). the another full walk around machine,
if you ever drove a older tractor, with FEL and/or backhoe. and worked a little bit. you should be able to tell how loose the pins / bushings / holes / etc.. are. there is just slop and everything kinda raddles around. greasing is long term solution of preventative maintenance, to keep everything nice and running for years to come, with noticable short term usage, when you do properly grease things, vs have not been greasing for some time.
It all makes sense, and I get the point of it all, just surprised about frequency. But that's surely from my lack of experience from handling this type of equipment. This tractor I just bought is the first tractor I've ever operated. Literally. It is even the one I test drove at the dealer. So I don't have a lot, or even a little, to compare it to. But I am getting some time now to catch up. Got the grease and greased it up today. Went and took pics of every lube point so I can create my own document on the matter - thought I had them all done and found one more I didn't find first time around. Well, I figured it was there earlier but couldn't find it. Needed to move the position of the loader to see it.