Oil bath or hard grease for wheel bearings?

[Cummins12V98]

I believe 75-90 is recommended. At least on our little RV’s.

[GlennWest]

I'm with him on this. Mine are oil bath also. my truck. Never seen one without.

[whmayhew]

Originally Posted by porkchop

Find a class 8 tractor and a semi trailer with hard grease bearings and send me a picture of the hubs, then I will believe it. Were you talking about Siberia or where north? Never saw one in the Yukon or Alaska. Walked around 3 truck stops in the last 3 days. Not even the heavy haulers. Not a one. Any one actually use 30w in theirs?

Bill

You are right Porkchop. I drive tractor trailer here in Maine and all our trucks are licensed for 100,000 pounds. We, and every other truck in Maine run oil bath. In an emergency if you lose a seal you could pack it with hard grease.