Now that I think about it "some" trucks did have a lug wrench but everyone was on their own to come up with a jack. I once had a center manager throw a hissy fit because I petty cashed the 10 bucks I gave to a farmer to drive back to his place, get a hydraulic jack, drive back to me and help me change a tire. The farmer didn't want anything but I insisted--told him to buy a couple of cases of beer on UPS. (yes you could get a couple of cases back then for ten bucks)