Wheel seal leaking outer rim surface

[eagle19952]

40+ years in the heavy highway/oilfield/construction industries
20 as a lubricants jobber employee.
kilns get to temps in excess of 1400 degrees.
with 40 feet of bricks.
it remains grease.
it is not synthetic.
here is one.

Sil-X Grease NLGI 1

Sil-X® Grease is a silica-thickened grease recommended for industrial applications subjected to very high temperatures requiring a lubricant which will not melt.

[gumpy]

kilns get to temps in excess of 1400 degrees.
with 40 feet of bricks.
it remains grease.
it is not synthetic.

The wheels on brick kiln cars are not subject to high temperatures. There is a firebrick floor on the car on which the bricks being fired are stacked. This floor seals against the side walls of the kiln, isolating the heat and keeping it away from the wheels and car structure.

[B_K]

If you want to get it looked at  while in Atlanta call Welch Industries
http://welchindustries.com/
Their main focus is on coach air conditioning, but they do other work too!

[wayne]

40+ years in the heavy highway/oilfield/construction industries
20 as a lubricants jobber employee.
kilns get to temps in excess of 1400 degrees.
with 40 feet of bricks.
it remains grease.
it is not synthetic.
here is one.

Sil-X Grease NLGI 1

Sil-X® Grease is a silica-thickened grease recommended for industrial applications subjected to very high temperatures requiring a lubricant which will not melt.

[Scott & Heather]

Thanks Bryce. I washed the wheel today and let it sit in the sun and clearly saw that indeed the stemco hub cover is leaking because the lazy shop peeps didn't put a new gasket in. Grrr. I'll have to fix it when I get to Orlando. I'm out of time here.


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[gumpy]

drive that wheel up on a tall block, causing the oil to run back into the hub. With luck, you will not loose much when you remove the cover to replace the gasket. To avoid torquing the bus, I'd probably run the front and back up on similar blocks.

[kyle4501]

A very good read on what grease is -

http://www.machinerylubrication.com/Read/1352/grease-basics

An excerpt -
Applications Suitable for Grease
Grease and oil are not interchangeable. Grease is used when it is not practical or convenient to use oil. The lubricant choice for a specific application is determined by matching the machinery design and operating conditions with desired lubricant characteristics. Grease is generally used for:

-Machinery that runs intermittently or is in storage for an extended period of time. Because grease remains in place, a lubricating film can instantly form.


This is why I want grease in the hubs on my coach - HOWEVER - if I could use my coach every day, I would happily change to oil. 

[bigred]

That is exactly right.Don't know if you guys are that familiar with older Subaru's or not ,but they had a CV joint that must have held a pound of grease and you could get a pin hole in that CV boot and it would grease the whole underneath front to back!!!!!It would sling every drop of the grease out of it !!!

[eagle19952]

The wheels on brick kiln cars are not subject to high temperatures. There is a firebrick floor on the car on which the bricks being fired are stacked. This floor seals against the side walls of the kiln, isolating the heat and keeping it away from the wheels and car structure.

bricks fire at 2000*F +.

tho the wheels may be isolated...I believe they suffer temps greater than any a road worthy bearing sees .... hence a specified grease. i give AWAG and say close to 1000*

[luvrbus]

About the only place on heavy equipment that uses grease are a few external places like places with pins and bushings 99.9 % of the bearings engine, and the drive train use oil they gave up on grease years ago and they can set for years with no ill effect

[Scott & Heather]

My old MCI 9 never once gave me a fit with the oil hubs. I did have to change out to new covers and gaskets but once I did that I had 6 years of completely perfect service with zero issues. I just wish I could get the 102 to baseline and just stop leaking. Cliff I'm using 90w gear lube


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[eagle19952]

About the only place on heavy equipment that uses grease are a few external places like places with pins and bushings 99.9 % of the bearings engine, and the drive train use oil they gave up on grease years ago and they can set for years with no ill effect

i certainly agree. oil is the design for a reason.

i just have not seem it turn to liquid under normal circumstance

[kyle4501]

i certainly agree. oil is the design for a reason.

i just have not seem it turn to liquid under normal circumstance

The thickener lubricant combination used will determine the viscosity of the grease.

I have seen lots of instances where the lubricant has left little more than the soap base behind.

When I was designing some custom machinery that had a demanding bearing application - the bearing engineers told me the bearing rollers didn't care what the lubrication was - as long as the rollers were wet.

Also said that "lubricated for life" was a marketing term. All of the engineers knew that when the lubrication was gone, that was the life of the bearing.

Another interesting thing was how temperature affects oil life. Best to keep it as cool as possible. 

[DoubleEagle]

Well, oil vs grease has been nicely covered, and Scott has yet another reason to stay away from a certain garage in Michigan. 

[Scott & Heather]

^ well said and yes indeed lol


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