Well, i am now changing my view on this subject!
On our recent, very dusty trip to Baja i wanted to use my hi-lift at camp to pull my wheels off and check my brake squealing. Jacked it up fine, no problem, couldnt get it to come down because the pins were all mucked up with dirt and dust. Tried another hi-lift, same problem tons of crap in the pins. We ended up messing with them enough to get them to work, but mine is going to need a serious cleaning/lubing after this trip.
This happened with the lift on the rear of the truck and i will now either look to relocate it, or cover it somehow.
Thats my new .02 after this weekend
Thanks
Kevin