4106 Oil Hubs

[Madmike]

I was driving my bus yesterday and it seemed like the left front hub was making a sound. The only word that I could form to describe it was dry. How do you check if there is oil? Does it come from one central tank or is there one on each hub. I could not see any thing leaking but I would like to be able to check it and fill it as needed. I have all the parts manuals but it does tell about the wheres and whys.

[gm4106]

GM 4106 has grease pack bearings.  Front and rears. Unless someone before you change them to oil.
There is a cap at the end of the hub you remove and add oil. There is a oil full line. If you have a maintenance manual check it. Check sec. 13 and 19 .

[lostagain]

After a good run down the highway, put your hand on the hub. Anything more than luke warm would indicate a bad bearing. Compare with other hubs around the bus, they may be a little hotter on a hot summer day.

JC

[Madmike]

I will take off the cap on that side and give her a look see. If the bearing do need to be repacked does any one  know where I can get a set?