To replace the vacuum hub actuator on your F-150 just follow the steps. You’ll need to lift the vehicle, remove the different parts to access the hub lock, remove the hub lock actuator as well as carry out a few other steps. You can carry out this tutorial of 15 chapters in 120 minutes. Take your 15 mm socket and your torque wrench and let’s get started!
120 minutes
15
4
$200
Lift the vehicle
Turn your engine off and set the parking brake.
Loosen the stud bolts on the front wheels.
Lift the front of your vehicle. Place the vehicle on the jack stands.
Don’t forget to put the wheels under the vehicle!
Loosen the wheel hub nut
Using a flathead screwdriver, remove the nut cover from the hub.
Then, locking the hub rotation with a crowbar, unscrew the hub nut using a ratchet and a 15mm socket.
Measure
To ensure that the part is properly installed during reassembly, measure the distance between the end of the CV Axle thread and the hub with a calliper.
Set up
Using a fork, disconnect the ABS sensor cable from the body.
Then disconnect it from the brake hose.
Finally, using a ratchet and a 10 mm socket, unscrew the fixing screw from the brake hose.
Remove the CV Axle
Using a breaker bar and a 22mm socket, loosen the nut on the upper control arm ball joint and unscrew the nut a few threads with a ratchet.
Turn the disk outwards, this will facilitate the following steps. It is now time to remove the outer tie rod from the knuckle. Knock on the knuckle to separate the ball joint from the upper control arm.
To prevent the wheel knuckle unit from falling off, lift the front axle slightly with a jack while being supported by the lower control arm.
Then finish unscrewing the upper control arm ball joint.
Lower the wheel knuckle slightly with the jack to remove the ball joint, and create the space needed to remove the CV Axle. Then shift the whole.
Disconnect the vacuum lines.
Tilt the wheel knuckle to remove the CV Axle.
Remove the Hub lock actuator
You can now see the vacuum hub actuator.
Using a ratchet and an 8mm socket, unscrew the 3 screws maintaining the vacuum hub actuator.
Using a large flathead screwdriver, pry it out of its slot.
You can now pull the CV Axle out of the hub and remove the vacuum hub actuator.
Clean the Hub lock + Greasing
Protect the CV Axle insertion slot near the contact portion between the hub and the vacuum hub actuator.
Then clean the impurities with a screwdriver.
Apply grease to the wheel hub.
How does a Hub lock work ?
In these images you can see how the vacuum hub actuator operates.
When your vehicle is in RWD mode, the vehicle’s vacuum pump operates and the vacuum hub actuator gear is drawn in, effectively disengaging the hub bearing transmission.
When the vehicle is in 4WD mode, the vacuum is switched off, the vacuum hub actuator switches on and the transmission connects to the wheel hub.
Install the new Hub lock
Take the new hub actuator. Insert the CV Axle through the vacuum hub actuator, then position the hub actuator in its slot.
Then, screw back the 3 hub actuator retaining screws.
Finish tightening using a torque wrench.
Reinstall the CV axle in the wheel hub
Remove the jack so you can manipulate the whole.
Insert the CV Axle into the hub by rotating it to fit into the wheel hub assembly.
Reinsert the upper control arm ball joint into the wheel knuckle.
Loosely screw the nut back on to hold it together.
Put the outer tie rod back
Put the outer tie rod back in place.
Then screw it back on.
Finish tightening using a torque wrench.
Complete the tightening of the upper control arm ball joint with a torque wrench.
Put the different parts back in place
You can now reconnect the vacuum hoses.
Screw the brake hose mounting bracket back on.
Replace the ABS sensor cable and clip it back into its slots.
Measure
You can verify the previously measured distance to make sure that the item has been correctly reassembled.
Screw the wheel hub back
Replace the hub nut.
Then, while blocking the rotation of the hub with a crowbar, screw it back on. Finish tightening using a torque wrench.
Put the cover back on the nut.
Put the vehicle back on the ground
Then, you will be able to put the wheels back on your vehicle.
Put the car back on the ground and block the wheels properly.
Operation completed!