^^^ This…
Don’t ever put a grease gun on the Bearing Buddy cap as they can easily overpack the bearing cap. The pressures inside build and the rear seal becomes compromised. The grease has no place to go in a sealed system, so, they get more and more grease until it can hold no more.
On a 2007, you’re probably due. Just break it down, clean everything, rebuild brakes if necessary, hand pack the bearings and stuff the cavity, check bearings and races for abnormal wear, replace the rear seals with new ones.
*** And this one gets overlooked. You should… Replace the brake fluid and bleed the brake system. The fluid is hygroscopic and absorbs moisture over time, causing rust. We expect the brake system to be compromised after almost 20 years of neglect. You should be prepared to be down waiting on parts needed.
BCB