Combines beans throwing out the back of 2388

The bean's your finding on the ground,are you sure they are coming from behind and not coming from the head.I have notice that this year the beans are short and that there is some loss at the cutterbar.The settings that you are at are close to what I am set at with my 2188 and 1020 25 ft head. Brian

Our settings right now are 2 on the concaves, 580 under a load on the rotor, fan on 1100, and the sieves pretty tight. The machine we had last year came from the factory with one of the five augers under the concaves not turning. It caused the sieves to overload on one side and throw beans out the back. It is worth checking just to see.

yes i am postive they are throwing out the back when you stand behind the combine i am getting pellted with seeds by the machine....

Bill, Unless you are cutting 65 to 70 bpa beans, you are driving to slow. Try driving 5 to 5.5 mph. K.A.

I was having a very hard time controlling rotor loss on my 1480. I was also getting a lot of pods in the hopper, especially the single bean_raw ones. I have 3 cover plates on the convaves. I still wasn't knocking out properly. I was trying 400 rpm as the book says and about 3 on the setting. In talking to others, I now run the rotor wide open in low gear at 650 rpm no load, about 620 under load. This provides excellent inertia for the rotor and consequently good engine power utilization. On the concave clearance, with the machine in gear idling, I pulled the concaves up until it started to click the rotor then lowered it just a little bit. I also bought an air jet chaffer from Marvin this year. The shoe seive and the cleaning fan are wide open and the sample is terrific.

I forgot to add that I have a conventional rotor with slotted grates with the cross bars removed.

Steve farmer, So you have the Air Jet for your machineIJ Where are you locatedIJ How long does it take to install the sievesIJ JWK

Just read your message above my questions. Thanks. JWK

Steve Farmer what size platform are you using and what is your ground speedIJ What fan do you haveIJ I seem to get alot of splits when I run the rotor that fast, are you getting any splitsIJ Have you run the AirJet in any cornIJ Thanks.

I am running a 22.5' header at 3.5 to 4 mph. It seems if I go faster, the cutter bar shells out too many beans. I think about all I am leaving behind now is header loss. Would a faster knife speed cut fasterIJ I have Crary guards with the short tooth between the main guards for a 1.5" spacing with 3 " sections. I have the old style fan and I removed the side louvers or air intake guides with the idea they could be causing some air restriction.I thought of this because on a John Deere 7700 with side air intake pods in place, I could not get enough air flow into the ends of the fan, even though it looked like there should be sufficient space for the air to flow. I am in northwest Minnesota and raise no corn, primarily wheat and beans. I get some splits, but not enough to be a problem since there is no penalty at the elevator for a small amount of splits. Food grade would be more fussy. I think the faster rotor speed results in more centrifugal force on the material in the rotor cage resulting in the beans being forced more to the outside of the cage and being able to better work through the concaves and grates. Marvin feels that most rotor loss is caused by too much return from not being sufficiently threshed on the first trip through the rotor. Incidently, my fan is at about 1050 and I have large wire concaves which, with the cover plates, I leave in for wheat also, so I am no longer changing concaves from crop to crop. Installing the air jet is as easy as pulling out the old chaffer and sliding in the frame for the new one. Once the frame is in, the 1480 uses 5 interchangeable elements with sets for different crops, kind of like you would change seives on a fanning mill. They each slide into a very nicely engineered yet simple retaining system which uses two locking wing nuts for the final fastening. It takes about 5-10 minutes to switch the 5 elements. Guess you could even say it's elementary. Sorry, but I couldn't resist the pun! The seive really is an engineering marvel to look at for people who appreciate nicely made gadgets. I also have a Redekop chopper that I consider a long term investment that can be put on my next combine when I trade, and the results on the residue are nothing short of amazing, as it also spreads the chaff. I had to set the fins back from their maximum spread to keep the material out of the uncut crop.