Bought used Impact gun, Should I grease it?

[Nick.Watson]

I just bought a used impact gun off eBay. I got the Mac AW612Q and was wondering if I should grease it? I am going to oil it tonight because the part that you put the socket on is a little stiff.

 

[ihateminimumwage]

Aircat makes those. Heard a lot of good, but haven't messed with one myself. Don't flood it with a ton of oil, and if you want to clean (and maybe grease) the hammers, should just be able to pull the 4 long screws off the back and the front will come right off.