Kangals (aka Anatolian Shepherd Dogs) are livestock guardian breeds (LGD), like Maremma, CAOs, Pyrs and others. They are bred to live outside with livestock and protect them against predators. In their homelands those predators included wolves and bears; in Australia they're reduced to dealing with wild dogs; feral dogs and foxes.
Because they need to work away from humans, LGDs are strong-minded, independent; generally dominant and can be both dog and human aggressive. Anatolians are big, determined and willing to make up their own minds. A dog of the right temperament can make a terrific family dog, but they are never going to be Labradors and will need competent, experienced owners.
I own one, Boo
, who recently came back to live with me after retiring from a (not very successful) show career. Boo is on the larger end of the scale for Anatolians, weighing about 68 kilos, although I don't know that he could pull a tractor.
He's a lovely dog, quite soft in temperament for an Anatolian, but displaying a lot of the breed's willingness to make up his own mind about what constitutes a threat.