I have a Gehl 65 Grinder mixer. I am using an 1.5 inch screen and grinding ear corn. My problem is a smaller screen turns my feed to flour, and the larger screen i am getting to much cob. My hammers have never been turned, I think by turning my hammers will help with my issue. My screen is brand new with sharp edges, and noticed that my cob pieces have rounded edges. How difficult is it to turn the hammers on this mixer. Is it a simple project or does it get very in depth.
 
I would think you are using too big of a screen. Maybe try using 3/4 to 1 inch size if you got them. I use to use a 3/4 inch for eared corn but now run it through a 1/2 inch screen. I use a steer stuffer and steers sometimes would get picky and short out the cob from the corn when it was ground too course and leave the cob. Your Gehl 65 is pretty close to being about the same as the JD and Artsway grinders I have been using. I turned the hammers on my JD right before I sold it but really didn't notice much difference in the feed it ground.
 
Not a hard job, takes some patience. I don't know how warn your hammers are, but 1.5 is a big screen so would expect a lot of cob. I think I am running a 5/8 screen
for it all, works great for ear or shell corn. I just turned the hammers in the 95 a couple years ago and made quite the difference, but they were round not square
anymore. Funny note, the 95 and 65 have the same amount of hammers just the spacers are wider in the 95. I have both mills here.
 
Not hard to turn,but I've been grinding ear corn for 50 years and I use a half inch. If memory serves me right,there's a little round plate that you take off the side of the mill and that lets you pull the rod holding the hammers out after you pull the cotter pin.
 
(quoted from post at 12:54:38 01/30/18) I would think you are using too big of a screen. Maybe try using 3/4 to 1 inch size if you got them. I use to use a 3/4 inch for eared corn but now run it through a 1/2 inch screen. I use a steer stuffer and steers sometimes would get picky and short out the cob from the corn when it was ground too course and leave the cob. Your Gehl 65 is pretty close to being about the same as the JD and Artsway grinders I have been using. I turned the hammers on my JD right before I sold it but really didn't notice much difference in the feed it ground.
noticed you commented that you went to a 1/2 inch screen. I was wondering if you ever had problems with Acidosis, by getting the corn to fine. I have a 5/8" screen that I could use, but I was afraid of getting to many fines, but I do think that would help take care of my cob issue. Right now I feel I have too much waist in the feed bunks.
 
Your using way too large of a screen. When I had ear corn I used a 5/8 or 3/4 screen depending on the moisture level of the corn. I ran the smaller screen on high moisture corn so the cobs where not too large. Then switched to the larger screen when the corn/cob got drier. Also if you think your getting too fine of a grind you do not have to grind with the throttle wide open.

As for flipping the hammers. It is not that hard of a job IF the nut/rods will come loose. I am pretty sure your Gehl mixer has a single rod for each row of hammers. Watch out so you do not twist the rod off because of rusted/stuck nuts/rods. A torch for some heat helps greatly. Actually good square/sharp hammers will reduce fines. They cut the feed easier so it goes through the screen faster. Dull/rounded hammers rub the feed through over a long distance thus causing more fracturing of the feed.
 
Think a screen more in the inch, maybe 1.25 inch, would do a better job. I don't agree with the half inch either, but 1.5 is awfully big hole.....
think we always had an inch screen?

Flipping the hammers is an easy job if you are working on a new machine. The trouble starts if it hasn't been done ever, there is 20 years of salt
on everything, the hammers are so used up the hammers are worn thin on one end, the holes are worn oblong on the other.... then it is a bear
of a miserable job. But on paper, it is quite easy.

Paul
 

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