[R-390] Collins R 389 PTO

[2002tii]

Tim wrote:

>I'm not sure why we go to so much trouble to replace a good solid PTO   :-).

The goal was to find a way to get the many R-389s with busted PTOs 
back in working condition.  The original suggestion was for a 
plug-and-play replacement for the 389 PTO, using whatever technology 
the designer wanted.

As Roy pointed out (and I have seen a number of times), when the 
motor drive crashes a 389 PTO, it's good and mangled.  If you can't 
find a replacement at a decent price (and it seems R-389 PTOs are 
rarely available at any price), and you don't think you have the 
skills to salvage the broken one, what can you do?  The fact that 
it's a 50-turn device (OK, OK, 51-turn) means you won't easily 
retrofit any other existing PTO.

Me, I'd rebuild the old one -- and I have done so.  But I have a 
machine shop, and not everyone does.  Building your own 50-turn PTO 
from scratch would be just plain crazy, when more modern methods 
would be so much easier and in some ways better.  Hence the present discussion.

Best regards,

Don