|
| I had a 643, now a 693. In my experience, they are both very good, reliable heads. If you get a 40, make sure it has the oil bath for the chain end drives. I think the tapered flute rolls seem to do better than the straight flute rolls... if you get one with straight flutes, cut 2 flutes off each roll, unless you don't want to go more than 4mph with head at full speed...other than that the biggest difference between a 40 and 90 is the poly. Except the newer 90's, they changed the header angle, and bevel gear in the gearbox for knife rolls.
Edited by 1985deere 7/14/2015 21:55
| |
|
JD 643 and 693 corn heads, what to look for; thinking of adapting to Gleaner L3
