It shouldn't be that difficult to put a filter in the LNC2 hydraulic circuit. 

As we LNC2 builders know, the fluid in the lines goes in different directions depending on whether we are raising or lowering the gear.  If you just put a filter in, you'll filter the fluid when the gear goes one way, and just backflush the filter when the gear goes the other way.  That's no good.

Here's one solution.  Pick a line leading to the pump.  Tee it off into two parallel lines.  Put a check valve in each parallel line.  Tee it back to a single line.  This way, in that short section, fluid follows one line one way, and the other line the other way.  You can install a filter in each line if you want, or just a single filter in one of the lines.  (Of course, you have to have the check valves going in opposite directions or your system won't work...)

Me, I'm not doing that.  Since there are several hundred guys before me that are making the non-filtered system work, why should I do different?

- Rob Wolf