I'm working on a 149 Hydro linkages bringing them back up to spec (getting the wear/slop out of them). I used Nylatron for the linkage that the adjustment rod connecting pin connects to, this originally had a dry bushing. Now my question the shaft that goes through the pump, and has the springs to keep the pump from jumping/bucking when a adjustment is made is also wore, with plenty of slop. I bored the cast iron bushing out, and pressed in a bronze bushing. Even with all my measuring etc. I went oversized just a tad, it's still much better, BUT I want this perfect.
What do you think is the best material to use here Nylatron, or Bronze ? I have seen Nylatron wear out a stainless shaft, and it needs no lube so to speak, but the lifespan is ten fold if you apply a lubricant. Then you have bronze, no special alloy here, and bronze is a time proven bushing material for sure. Give me some ideas.
One more thing, all said, and done cast iron may be the best bushing material available able to hold lubricant, and very stable/easy to machine as well. The idea in the end is a replaceable bushing as to not wear the shaft which would be much more costly replacement/repair.