Park the trailer on a level surface and chock the wheels
Loosen the lug nuts before lifting the trailer
Raise the trailer with a jack and support it with jack stands
Remove the wheel and tire
Remove the dust cap from the hub
Remove the cotter pin or retainer
Remove the spindle nut and washer
Pull the hub and drum or rotor off the spindle
Remove the outer bearing
Pry out the grease seal from the back of the hub
Remove the inner bearing
Clean the bearings, races, hub, and spindle with solvent
Inspect bearings, races, and spindle for wear, pitting, or damage
Replace any damaged parts
Pack grease into the bearings by hand or with a bearing packer
Fill the bearing rollers completely with high-temperature wheel bearing grease
Apply a light coat of grease to the bearing races and spindle
Install the inner bearing into the hub
Install a new grease seal
Slide the hub back onto the spindle
Install the outer bearing
Install the washer and spindle nut
Tighten the spindle nut while rotating the hub
Back off the nut slightly until the hub spins freely with no play
Install a new cotter pin or retainer
Reinstall the dust cap
Reinstall the wheel and tire
Tighten the lug nuts in a star pattern
Lower the trailer and torque the lug nuts to specification
Check for smooth wheel rotation and proper bearing adjustment
Recheck bearing play after a short test drive