Gleaner F fan

Adjusted the top sieve to 5/8 fan at 2/3 and on up. Hulls were bad. Adjusted sieve to 3/4 worse yet. Put sieve to 1/2 3/8 started to clean up but still a lot of hulls. My tach doesn't work how do I tell if fan speed is going up? What am I doing wrong? Sieves junk? They don't look bad and they adjust. Could my fan be plugged? Thanks for all the help it is got to be something simple I am over looking or not doing right.
 
First of all- learn the proper names: Chaffer is the top screen, sieve is the lower one. (makes it simpler for us to explain...) You"re talking sieve all the time.....there is the chaffer and the sieve- you need to adjust both to work together.

Here"s a trick I"ve used for years when setting the sieve....with the sieve CLOSED..throw a handful of beans (or whatever you"re harvesting) across the sieve. Open it enough to let them fall through. That judges the seed size. Seed going into the bin! As I"ve said before, the sieve is the last line of defense as to what ends up in the grain tank. It IS the last screen! Yes, you"ll always get some hulls and unthreshed grain in the tank- if you don"t, you"re losing good grain behind the machine. It is a judgment call on settings.

Start with setting the cyl according to the book- both cyl speed and concave clearance. How many concave bars are you running? Gotta have one on the rock door, to maintain rock protection, then maybe three on the rear concave door. Concaves are either angles, channels, or half-round bars.

Keep cyl speed low as long as you can shell out the beans. Drop cyl first to close concave spacing before increasing cyl speed. Speed makes feed! ie, split beans, ground corn, ground oats, etc.

Stop the combine without letting it clean out......check the straw inside, and on the walkers, for unthreshed bean pods. That is a cyl clearance/speed issue. (everything behind is a walker/shoe/fan issue). With unthreshed pods on the raddle or walkers, drop cyl lower to the concave, before increasing cyl speed (remember, speed makes feed).
 
Sieves junk??? Look at the fins....sometimes they get bent. straighten them with pliers. If they adjust with the lever, they"re ok. Fan plugged? that"s a visual.

I"m assuming you have the Op manual for the combine? To check for settings, adjustments, etc?
 
Yes I have the book and that is where I started. So basically I am worrying about something that can't fix? I am kind of a profrectionist. The machine is probably set right. I will set the "Chaffer" to 5/8 and throw a hand full of seeds in to see what the sieve needs to be sat at. Everything moves and I don't have a lot in the return elevator. Thank you for the advice!
 

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