Combines why won t my 860 cleanIJ help

[MF_RED]

Very simply, you want the blast of air from the fan aimed right at the back of the main grainpan or as you stated, handle down to the frame. If you are in heavy crops you may want to raise the lever a little. The whole idea is to blast the trash away from the grain while it is falling from the grainpan to the sieve. The trash shouldn,t be sucked down if it is set like this. Also just a thought, do you mistakenly have the wrong top sieve in placeIJ Also did you check the rear angle on the concaveIJ And the transition fingers from the rear of the concave to the walkersIJ If they are broken or missing, this will allow extra trash to fall to the grain pan and sieve.

 

[greyhawk]

Hi Narrow row and all. I have run a greycab 760 for about ten years and been plagued with this problem of trash in the sample for the first five. (so I'm a slow learner) Canola was the worst - long stuff spearing the sieves would drive you nuts - I pulled out the middle seive and extended the top sieve to full length - made it a lot better, but the stuff shouldnt be getting in there in the first place. In wheat we were OK in good crops but got a heap of longish rubbish in the grain sample in light crops, didnt seem to matter what we did it wouldnt fix it. I finally figured the problem for our conditions. If youre loading the machine up in good wheat and push a bit hard you will get CHAFF in the sample-open the seives or back off a little will usually fix that, but if you are in light crop and getting longer stuff - bits of flag leaf or straw 3 to 4 inches long - I will just about bet my best boots its coming in thru the cleaning fan. In windrowed (swathed) canola we were running in stubble taller than the machine sub frame and the broken stalks from that and behind the tyres were coming in the fan. Same deal in wheat, we got the machine with an Australian finger comb front on it and the cut crop height is too high and the same thing happens, in a good crop youre not there long enough for a binful to matter but in lighter crops you run twice as far and a lot faster so it turns into a headache. These old masseys had a lot going for them - mine will cut over twenty ton in an hour of good wheat - power is all that stops it doing more.

 

[MF_RED]

Come to think of it, if I remember correctly, the newer 850and860s had a modified fan screen on them. It seems like the came up higher along the side of the machine to remedy the situation. I will have to look at my info and see if that was the case. If it is, it wouldn't be difficult to modify the existing screens . When I ran 760s in good crop "wheat" I always crowded the machine and never had any problems with samples or trash. These machines were designed to be kept full when threshing.

 

[parky]

The 50 and 60 series Massey's with the rubber paddle setup cause some breakup in the heads at the feeder housing throat, more so then the conventional feeder chain setup. This causes a large number of "white caps" to drop out at leading edge of the concave and eventually going through sieves and into the tank. Ray Stueckle years ago in the Grainews paper, recommended the front part of the concave be blanked off to push the unthreshed grain kernels farther back in the concave. This definitely works, the trick is to sort them out at the sieves and feed through the rethresher and get the rest. OF course on a perfect day with grainheads at perfect moisture they stay together in feeder housing and the machine makes you proud. If grain is really dry, then you are threshing in the feeder housing more then the concave. Sounds like you are dealing with a really dry swath that tends to break up easily, grain variety and when you swathed can make a big difference.