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Old 09-26-2014, 12:02 AM   #15
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Originally Posted by Old Rv'er View Post
OK, late update. Filled up using the red plug opening, but that did not get it full enough, so found the correct Allen wrench size, and took out the plug and filled 2/3rds full. Believe the leak is from the red plug area, it's now on my monthly watch/maintenance list. There was a small amount of lubricant left in the hub assembly reservoir so it never went dry. The PS side never leaked at all and it's level is fine. This thread is now complete.
Check this document http://www.stemco.com/f/qbin/tech-ti...-procedure.pdf for the correct oil level in the hub. If you have the sight glass on the cover 2/3 full you are way over full. IMO

There is a specially designed vent in the center of the plug to allow it to equalize pressure as the hub heats up and cools down without the lubricant seeping out. In my experience the red plugs can become hard over a period of time and allow lube to seep around the outer diameter of the plug also.

Here's a link to the service interval Tech Sheet for the Stemco Covers.http://www.stemco.com/f/qbin/021-Sys...-12-2-2013.pdf

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Old 09-26-2014, 12:06 AM   #16
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Originally Posted by Dave Fernandez View Post
Lucas Oil also makes a Hub Oil which I have used when I serviced my front hubs.
Same here.

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Old 09-26-2014, 12:51 AM   #17
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Thank you, the other side is much fuller than the level indicated in the document. I have had not issues with that side. Suspect I need to order a new center plug, but when I pulled it out to add lubricant, it did not seem hard, and it has not leaked since I added fluid last week. I have to do the air dryer tomorrow, I will check for leakage then and see how it's level is.

Monty & Janet - 2007 Alpine APEX 40 MDTS
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