Pins and bushings, first off, you should have or be using hard chromed pins.... If not, get some and you will be ahead of the wearing game. Whether pins for connector links or king pins / king bolts for your axles. Get HARD CHROMED PINS. Working industrial maintenance for years, we used lube reserviors on lots of machine bearings etc. They work like bearing buddies for trailer wheel bearings. Always keeping some pressure on the grease to replace any that leaks away etc. They have spring pistons (like the BB's) and keep lube available even if they are missed on a regular scheduled lube job. The reservoir keeps lube available at all times if normal lube is pushed, beat, or washed out. They come in many sizes so check your supplier, Grangers, etc for what is available. Might help with your wear problems. They can be used anywhere a zerk fitting is used, On that axle to keep those king pins lubed too. Hope this is useful in some applications, There are lube (grease) and oil reservoirs so use the ones that fit your application needs