just as many under greasing too. Behind the rubber seal is a grease zert to give those bearings a shot of grease. Look in your book to determine if you have alco axels. The cap should be removed if greasing the bearings. That rubber seal can give you the dick'ns trying to get it back in. All bearings should be removed, cleaned, inspected, repacked, and reinstalled with new seals annually.
Don & Dona W/yorkies Gizmo, Master Chief, & Tali
2011 Flagstaff 8528 BHSS 2015 Ford 6.7 XLT
2010 Full Timers & Still Going