I have been repacking every 2 years or 12,000 miles. Before every trip I remove the rubber plugs, have a look at the outside, and add a few pumps of grease through the zerk fittings.
I had a wheel bearing burn out on me a few years ago before I started doing this. The original dealer told me the wheel bearing were "sealed" and needed no maintenance! If you could see that bearing you would know what a dry bearing looks like, as opposed to the proper gooey look that you should expect! Before that I knew almost nothing about wheel bearings, and now I am well read on the subject. Believe me, having your wheel bearings repacked is a lot cheaper than replacing a burnt-out spindle!
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John & Janet from Texas via Connecticut and Vermont
2012 Keystone Montana 3150RL 5th Wheel
2012 Ford F350 Diesel 4x4 Lariat Crewcab SRW
6.7L V-8 diesel, 6-sp automatic, 3.55 axle ratio
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