2003 Alpine 38FD wheel bearing oil level

[greenmachine]

Hello all,
On my 38FD Coach I have a rubber cap for the bearings. What is the right oil to use and should the level be at the bottom of the cap. I have seen some where you see a plastic clear cap and can see the oil level in there with a line for level. Can you get those plastic caps for these and I think you would unscrew the plug and add oil. You guys have pulled me though so much and saved me a lot of pain. My next project will be changing filters and oil in transmission, that's another thread. Thanks again for all your help.
Thanks
Larry Pate
2003 Alpine Coach 38FDDS 350 ISC
Boston Ky.

[Old Scout]

My experience with my 03 with 150k miles is: use 80-90 weight oil and fill to the bottom of the red cap opening. Later models have a fill plug or perhaps a fill level line on the stemco hub but the 03s didnt. Note, the wheel hub itself has a fairly large hollow for oil capacity so whether you fill it to the red cap opening or find some way to get more in probably doesnt matter that much. Whether you use synthetic or dino oil is a personnal choice. Assuming your have dino now and want to switch, the only way I know of to completely drain the oil out of the hub is to remove the hub--not a project for the "faint of heart".....
[might get by just removing the outside bearing, but]

[greenmachine]

Thanks Old Scout, You always come though. I'm doing a lot of learning and I'm writing it down thanks again.
Larry Pate
2003 Alpine Coach 38FDDS 350 ISC
Boston Ky