John:
I've got three pumps in pieces (so far
), well two and one with all the covers off. The one not fully disassembled is the super nice 2.2S (009) that is like pristine. It has been my reference for the crap 2.2S and 2.2L(?) - read 010 pump.
So observations... that joint is kind of unsupported for what it seems to do so if that pin elongates or wears then the motion between the two arms binds rather than moving smoothly (note: the 'C-' pump has less play than the 'F' pump). I say this as the two disassembled 'crap' pumps (stuck plungers) have play there (like sicssors that need the bolt tightened so the blades widen instead of cutting) but the nice pump doesn't have any play. It just rotates (swings?). I haven't really looked at them to figure out if it is the pin or the hole that has worn. My guess would be the hole since it is only a mild steel stamping.
Does yours have play (like doing a turkey wishbone?) or am I a victim of too few data points?
The wear also scales with price! 750 = 0, 400 = some, 50 = holy!
tadd