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Open Roads Forum > Fifth-Wheels

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wilber1

Abbotsford B.C.

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Posted: 01/26/17 09:26pm

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Likes to tow wrote:

Pennzoil 707L is on the recommended list Dexter publishes. The dropping point of it is 500 degrees. Red N Tacky by Lucas has a dropping point of 540 degrees. Either one should be ok looks like to me.

It's on Lippert's list as well. Maybe they should try it.

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laknox

Arizona

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Posted: 01/26/17 09:32pm

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Personally, I just grabbed a tube of some black, graphite (or something) infused general purpose "tractor" grease from my dad's shop and have used it since new. When my bearings and seals were replaced in '14, the shop said there were no leaks past the seals and all the bearings still looked to be in excellent shape. For $130 for 4 new Timken brand bearings and seals after 10 years and only 15k miles, it was a no-brainer. Still no leaks and hubs run pretty cool.

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time2roll

Southern California

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Posted: 01/26/17 10:16pm

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I use Mobil 1 and have had no issues. But then it has only been 8 years now maybe I should inspect [emoticon]

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path1

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Posted: 01/26/17 10:20pm

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OP...grease and lubes are in their own world and many different ideas about them. I used to use Ford racing grease because of high drop point etc. Then after talking with an engineer that told me if I needed that high of dropping pint I had other problems. When I had a problem with one hub my temp measured with a IR gun was 210 degrees. An axle sitting for long periods of time is not the best for any type machinery. Anyways....After doing a lot research I now use cheap Walmart grease...can get nation wide and don't worry about mixing the "type". "Type" as in base material the grease is made of. Here is a link with good info from National Grease and lube inst. Not exciting reading, that's for sure but lots of info. https://www.nlgi.org/faqs-lubricating-grease/

FAQ number 9 and 10 applies to RV's IMO. A lot of sitting and not being used does take a toll.

tvman44

Southwest Louisiana

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Posted: 01/27/17 06:36am

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That is what I used when I repacked my wheel bearings a couple of months ago.

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3oaks

Pennsylvania

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Posted: 01/27/17 07:55am

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Quote:

I think it has a very low "drop point" and when the brakes heat the drum the grease becomes oil and runs through the seal.

A quality seal still should not leak. In the manufacturing industry we use those same seals in gear boxes that are filled with oil. Overtime all seals eventually wear or become contaminated with dirt or become brittle and start to weep.

The specified "drop point" of the bearing grease is to hold a specific thickness of lubrication (grease) between the bearing rollers and the inner and outer bearing races at high wheel bearing temperatures.

ScottG

Bothell Wa.

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Posted: 01/27/17 08:04am

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3oaks wrote:

Quote:

I think it has a very low "drop point" and when the brakes heat the drum the grease becomes oil and runs through the seal.

Therein lies the problem; It's either Lippert, Alko or Dexter and none of them are high quality.

azdryheat

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Posted: 01/27/17 10:55am

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Lippert says to use a lithium-based grease. They have a PDF with grease specs and recommended greases that don't appear to be synthetic. Lippert also says to coat the outside of bearings with a Permatex sealant.

Approved Greases:

Mobil Oil - Mobilgrease HP
Exxon/Standard - Ronex MP
Kendal Refining Co. - Kendall L-427
Ashland Oil Co. - Valvoline Val-plex EP Grease
Pennzoil Prod. Co. - Premium Wheel Bearing Grease 707L

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