I plan on pulling off all of the wheel bearings and cleaning the grease off and then repack with a known to me grease.
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
Just follow the axle manufactures recommendations on grease intervals and the proper type of grease and you'll be fine. Most important thing to do would be to check your wheel "end play" of each wheel, at least once a year. The max "end play" numbers would be in your manufactures manual as well. Bath bearings on driver axle(s) of a MH have a torque value of their own but should be mentioned in your owners manual as well.
I've never done anything with any bearings of any of my trailers. I'm starting to think I've been very lucky so far that I've had no issues.
I know nothing of this kind of work. Is this a DIY for a rookie, and if not, what kind of business should I look for in the Yellow Pages?
I never repacked the bearings on my popup in 13 years, but... probably only put 500 miles a year on it. Manual said annually or every 5,000 miles. Seems to be a pretty wide spread when you compare miles vs. years. I doubt very many people re-pack utility trailer bearings that frequently.
Now, with a bigger travel trailer - I decided to have it done regularly. Our dealer told us in NY state the inspection requires a wheel to be pulled to look at the brakes. The state also sets the inspection fee - at $6. Given the $6 fee, I have never had a shop pull a wheel in all the times I have had trailers inspeced. Anyhow, dealer suggested if they do the inspection, they will pull one and let me know when they recommend re-packing them. They have been straight up on everything else, so I think I'll go with them on this.
But to your original question, on a small trailer(or a big one), you can do it yourself if you want. There are some good videos online to show you the steps. If you have a few basic tools its not too complicated. Basically dis-assemble, clean, inspect, grease, re-assemble. But its like anything, takes a few times to get efficient at it. Or many auto mechanics would probably do it for you - I'm sure they would give you an estimate. To me, if a job like that isn't too expensive, it just so much quicker to have somebody who does it all the time and has the tools/materials all setup. I've cost myself a lot of wasted time learning on the job or not having the right tools a few times...
Either way, re-packing once in a while is good preventive maintenance.
Bearings are easy to check visually. Wipe the outside of the bearing clean. The rollers should be a shiny chrome. Any spots that are not indicate galling.
Packing them with grease is really easy and really messy! I always recommend hi-temp grease, usually lithium based.