Wheel Bearing Adjustment

[Dwight]

What is the recommended procedure for adjusting the wheel bearings. I have read that "pre-loading" is and isn't recommended. What is the preferred method?

[Inland RV Center, In]

Dwight. Years ago, a 5 to 7 foot pound bearing preload was used. That has not been used for a long time. The accepted way today, is to tighten the bearing retainer nut, just to the tight position. THEN, back off to the next slot in the nut. Grab ahold of the tire and see if you can feel a very slight "slop." If not, then back up one more slot on the nut. When done, a slight slop must be felt. That indicates a very small play, instead of being overly tightened. As the bearings warm up, some of that slight play will go away, as opposed to being very tight, which will cause the bearings and races to overheat. Andy

[Dwight]

Andy, thanks for the heads-up on the "pre-loading". Next question: what is the best brand of grease to use?

[Action]

Andy,

Or instead of brand, is there different types of wheel bearing grease (automotive, marine, special RV, or "double top secret" RV wheel bearing grease ) that make a difference.......... Different properties? or ?

>>>>>>>>Action

[Inland RV Center, In]

The very best wheel bearing grease to us is called 'lubriplate." It's used in boat trailers. But, most any "high" quality wheel bearing grease is OK, if it rejects water. Many trailers sit for months. Moisture has a tendency to collect within the hub. Therefore a very good grease is a "must."
This is also why bearings should be repacked every 10,000 miles, OR, once a year, even if the trailer has not moved. Making sure that the bearings are water free is an absolute must.
Having a hub seize is not to be taken lightly. Andy

[Over59]

Time to repack those bearings. The lub Andy refers to is
Lubriplate L0220-004.

[slowmover]

I would recommend SCHAEFFERS #221 or #238. See their site and contact a sales rep, this company has outstanding products and been in business for over 160 years, selling primarily to ag and industrial clients.

Schaeffer Lubricants | Heavy Duty Moly Grease

[Over59]

Interesting site. They also have a marine grade.
Schaeffer Mfg. | Moly Ultra Red EP Multi-Purpose Grease

[davidlaxson]

Just repacked my 1972 Overlander. Like Andy said, do it once a year . I used Exxon Infinitec , it's a high quality lithium-complex grease. From what I've gathered on the internet it's the best grease out there.......even used on race cars.......not that I haul A** when I'm going down the road . Do a internet search on it and you'll see what I mean. I had to buy a full box ( 12 tubes ) from a speciality lube shop & paid top dollar. But it's peace of mind when you
traveling at 88 feet + per second !!!

Good luck on your travels,

David

[nickcrowhurst]

I find it interesting that the Timken Bearing Technical Department recommends a water-absorbing grease, rather than a water-repelling grease as advocated at post 5, above. This is so that the water is removed from contact with the bearing. Post 10 of this post refers:
http://www.airforums.com/forums/f44/...nce-37198.html
I have no opinion on this matter, but am just reporting what I was told.
Nick.