Cummins12V98 wrote:
"You don't have to remove the cap sleeve to add grease. That little rubber boot pops right out."
True but it was required for me to adjust the bearings. Even just greasing I thinking I would still remove the metal cap as it makes it very easy to remove extra grease. It also allows for expansion of the grease if that is a concern.
Don't have to, but much easier to clean up old, and excess grease, with the cap removed. Ya, those edges with just rubber plug removed are sharp.
With a cold hub, packed full, then heated at hi-way speed over longer distance, I have seen the rubber plug partially pushed out, releasing air, and a little grease too. When reinstalling rubber plug, I try to burp a little air (think tupperware lid).;)
Jerry