Secure the trailer

1. Park the trailer on level ground.
2. Block the trailer tires on the opposite side securely so that the trailer cannot move forward or backward..
3. Jack up the trailer following your owners manual on the side you will be working on and secure it using jackstands..

Tear Down...

1. Undo the lug nuts and remove the wheel (s).
2. Carefully pry off the dust cap using a flat screwdriver.
3. Straighten the cotter pin that holds the bearing nut and remove it, then remove the bearing nut and washer.
4. Pull the brake drum forward being careful to keep the front bearing from falling on the ground. The outer race stays in the drum, while the inner race and roller bearings come out as a unit.
5. Place the front bearing, bearing nut and the bearing washer in a clean container
6. Place the brake drum face down.
7. Pry out the grease seal which will be replaced later.
8. Lift out the rear bearing and place it in the container with the front bearing parts.
9. Do not the bearings each bearing must mate with it's original bearing race.

Clean and Repack

1. Thoroughly clean the bearings and other parts in a solvent until all the old grease is removed then dry (compressed air can be used). Also clean the spindle and hub.
2. Inspect the bearing races for heat discoloration, pitting, scoring and any unevenness. Inspect the bearing for the same damage. (Out of round rollers, cracked roller cages and rough running will indicate replacement is required)
3. The bearing and both inner and outer races must be replaced as a set.
4. Since you have the parts off inspect the brake drum for pitting and excessive wear and the brake magnet surface for excessive or uneven wear. If the brake drum and magnet have been saturated with grease from a bad seal- replace the shoes and magnet, and have the drum turned or machined.

Pack the bearings

1. Place a decent sized glob of wheel bearing grease in one palm. Grasp the bearing with the other hand so that the wider end is facing the grease.
2. Force the grease into the gap between the inner race and the outer cage so that it squeezes up through the rollers and out the top.
3. Press the bearing down into the grease in a rocking motion and continue until the grease oozes up.
4. Rotate the bearing 1/4 turn, at a time, and continue until the bearing is completely filled with grease
5. Put some grease inside the hub and spread it around the circumference of the hub then place the inner packed bearing into place in the hub.
6. Place a new seal on the hub and tap it into place with a hammer until it seats fully. Be sure to wipe off any grease that is on the outer flat surface of the seal.
7. Replace the drum onto the axle spindle, insert the outer bearing, thrust washer and axle nut.

Preloading

1. Tighten the axle nut by hand until snug then another 1/4 turn with a wrench.
2. Spin the drum several times to distribute the grease evenly.
3. Back the nut off until loose and then retighten finger tight.
4. Insert a new cotter pin to lock the nut in place and bend it over the spindle.
5. Re-install the dust cap, wheel and tire, and hubcap.
6. Now is good time to adjust the brakes.