Hello all! Quick question, my boss recently purchased a used cat 420d that was in service for the US Marines, I was doing a PMCS, and greasing everything, I got to the two pins for the boom and the top pin took grease until it pushed out above and below the pin(see photo 2) the bottom pin only took a little grease and then it stops, but I don't see any coming from between boom and the pin(see photo 1), is this a sealed bearing of some sort that only takes so much grease. Or are the grease channels clogged, any help would be greatly appreciated!
No replies yet.