How to change a front wheel bearing on a 51 plate jeep cherokee

If it's four wheel drive, remove the wheel center and the cotter pin and castelated cover on the axle nut. put the wheel back on the car. With the car on the ground, put your socket through the center of the wheel and using a long breaker bar (with the aid of a five foot pipe) break the axle nut free. Remove the wheel, caliper and rotor. Loosen the three twelve point bolts that retain the bearing hub assembly to the steering knuckle and turn them most of the way out. Put an old twelve point socket on them one at a time and hammer them to drive the hub out of the knuckle, using lots of solvent around the perimeter. If the axle tries to follow put the axle nut on it and give it a shot to separate it from the bearing. Once removed, clean all rust from the bore and reverse process using the new hub. Torque on axle nut is 175 foot lbs. if cotter pin does not align properly, turn tighter to align holes, never back off to do that.
good luck