Replace front wheel bearing
Remove the wheel, remove the spindle dust cover and remove tho cotter pin and remove brake caliper and finally remove thr spindle nut,washer and inner bearing and finally the rotor. remove the dudt seal on the back of the rotor and finally the inner braeings.when you replace the bearings make sure that you replace the races and install a new seal on the rotor
SOURCE: 2002 ford explorer front wheel bearing assembly
remove hub ,take retaining circlip out and knock it out with a big big hammer supporting it on an old wheel rim and a tree trunk.this job is easy to do but unless you have the right tools entrust it to a garage who will have a nice press .
The bearings on the wheels has to be installed one way only, the rotor ring is built into the bearing and if installed the wrong way round the sensor cant pick up the wheel speed causing the ligt to be switched on in the cluster. The diagnostic equipment should pick this up as a fault once the car has been driven, it will see the sensor when you do the diagnostic if the car is standing still but once the car is moving and no signal is send from that wheel it would register a fault into the memory of the PCM that you would be able to retrieve later.
There is a way for you to test the sensor yourself by using a multimeter set on volts, you jack the vehicle up at that wheel, install a vehicle stand to support the vehicle to be safe, disconect the wheel speed sensor and probe the two wires into the sensor, spin the wheel by hand and a small amount of current will be produced meaning the the sensor is working and the wheel bearing is installed the correct way, you can also do a continuaty test on the sensor by switching the multimeter onto ohms, but be very carefull, if this sensor has three wires you cant do the continuaty test because of the integrated circuit in the sensor, the three wire sensors opperate on a voltage from 5Volt and it would be destroyed by the multimeter opperating on 9Volt.
If the continuaty test passes and the bearing is installed the correct way, the most comon fault would be a break in the wiring leading to the PCM
Hope this will be helpfull.
SOURCE: Replacing front wheel bearings
It isn't a particularly hard job but there are a few techniques that you need to know.
I wouldn't recommend you do it yourself but I would recommend you do it under supervision of someone who knows their stuff.
Retensioning the bearings correctly is extremely important.
SOURCE: replace front wheel bearings 99 ford explorer
not press fitted, standard tapered bearings, if 4X4 it is a little more involved, just dont misplace any of the smaller parts and you will be fine.
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