Mf Combines

[two-cylinder]

Should the concave really be on setting 7 for wheat?
Seems a bit wide?
We have our 7252 on N or one eitherside as necessary.

 

[rob1]

have ours on N or one tighter for wheat, lost hardly any last year

 

[Adeptandy]

ARE they settings recommended on the data screen

They're in the zones recommended, but been off piste as well and can't seem to improve it.

 

[Adeptandy]

have ours on N or one tighter for wheat, lost hardly any last year

opened it up to 7 to ease the straw flow as it was smashing, it was worse on 5 as per book

I don't appear to have a N and no recommendations on the data screen, all out of the book for settings - 04 plate machine

 

[Hampton]

Just a curious thought.
Realy struggling to keep the grain from ending up back on the floor, never been a problem until we started the MF adventure. Is it something I'm doing wrong in setting it or are they just not as good at sorting the mass of material, tried all sorts of settings and speeds and still getting the same problem
I will confess to being a little lacking in knowledge on setting a combine, as was trailer boy until Dad retired and he seems to be lacking in advice since retiring, so in at the deep end a bit

Not MF but applicable all the same

 

[rob1]

opened it up to 7 to ease the straw flow as it was smashing, it was worse on 5 as per book

I don't appear to have a N and no recommendations on the data screen, all out of the book for settings - 04 plate machine

what speed are you going, lots of straw this time and noticed where I pushed on more was going over the back, Im like you a novice combine driver,perhaps I was lucky last year, someone told me that header losses are the highest, not having the real set right and getting the heads going in first can be the cause of losses

 

[Rust]

opened it up to 7 to ease the straw flow as it was smashing, it was worse on 5 as per book

I don't appear to have a N and no recommendations on the data screen, all out of the book for settings - 04 plate machine

N is 4

 

[rob h]

Ours is a 93reg 32 all the settings info and hints and tips for improving performance are available on the datavision screen.just scroll through the menue. Maybe newer ones don't have this

 

[Adeptandy]

Ours is a 93reg 32 all the settings info and hints and tips for improving performance are available on the datavision screen.just scroll through the menue. Maybe newer ones don't have this

I haven't seen it, but will be looking in the morning

 

[goldeneagle]

I haven't seen it, but will be looking in the morning

It is located within the menus on the DV2 screen, not the most logical to locate sometimes. Quite a lot of useful stuff in there if you know where to look especially for any electrical issues with the diagnostics section.

 

[kc6475]

It's a fine line sometimes getting the correct settings, our old 36 rs was pretty good at keeping the grain in the tank, problem was always had bits of straw in the sample, had same issue on previous mf also. I always run with drum near flat out and set concave as to your needs, if not threshing heads then tighten, but if threshing well then run as open as possible, the less you smash the straw up the less trash you will put on the sieves, would say your top sieve is a bit tight at 10, had ours on 12-13 in wheat, your returns should be ok with bottom sieve at 8 so I would start with concave setting, top sieve, and fan if your losing it over the sieves, but have to balance them with sample also.

 

[Farmersboy]

Can you alter where the airflow from the fan hits the underside of the sieves? Usually an adjustable flap with several settings, consulting the handbook for suggestions for your conditions

 

[rob h]

It's a fine line sometimes getting the correct settings, our old 36 rs was pretty good at keeping the grain in the tank, problem was always had bits of straw in the sample, had same issue on previous mf also. I always run with drum near flat out and set concave as to your needs, if not threshing heads then tighten, but if threshing well then run as open as possible, the less you smash the straw up the less trash you will put on the sieves, would say your top sieve is a bit tight at 10, had ours on 12-13 in wheat, your returns should be ok with bottom sieve at 8 so I would start with concave setting, top sieve, and fan if your losing it over the sieves, but have to balance them with sample also.

I only slow drum speed for rape and beans .everything else its flat out then open or close concave to suit conditions

 

[two-cylinder]

I only slow drum speed for rape and beans .everything else its flat out then open or close concave to suit conditions

The 30/32 7250/52 need a faster drum speed than the bigger models because the drum is of smaller diameter.

 

[rob h]

The 30/32 7250/52 need a faster drum speed than the bigger models because the drum is of smaller diameter.

that must be why it needs to be run fast . I seem to remember their is a optimum speed for rasp bars so smaller diameter needs more speed

 

[Flat 10]

Wind sounds low compared to some other makes. Have you a chaff spreader? ie are you certain whether it’s sieve or walker losses?

 

[Exfarmer]

It is difficult comparing MF conmbines down the ages as they come from very different families.
Historically they were North American designs, with short walkers, reflecting the relatively low levels of straw passing through..
Then they were Danish designed and I think this one belonging to the OP is an Italian Laverda design , but I may be wrong.
Certainly ccutting barley has always paused problems due to high straw volumes and low differential between barley and straw density.
Rarely will you get anywhere the output in a barley crop compared to wheat. Keeping your drum as open as possible and revs as low as you can to avoid straw damage is the key. However it is crucial to get seperation in the drum.
If your walkers are closed bottom ensure there is no build up of awns and chaff blocking them.
Keep wind up but take care if it is a poor 6 row sample as it may blow over..
Keep an eye on returns, too much will cause overloading of the top sieve.
A kill stop may help identify if you have got sieve loading right, think I am right saying there should be virtually no grain on back half.
May help to get sample of the chaff coming over the sieves while in action , but take great care!

 

[Badshot]

It is difficult comparing MF conmbines down the ages as they come from very different families.
Historically they were North American designs, with short walkers, reflecting the relatively low levels of straw passing through..
Then they were Danish designed and I think this one belonging to the OP is an Italian Laverda design , but I may be wrong.
Certainly ccutting barley has always paused problems due to high straw volumes and low differential between barley and straw density.
Rarely will you get anywhere the output in a barley crop compared to wheat. Keeping your drum as open as possible and revs as low as you can to avoid straw damage is the key. However it is crucial to get seperation in the drum.
If your walkers are closed bottom ensure there is no build up of awns and chaff blocking them.
Keep wind up but take care if it is a poor 6 row sample as it may blow over..
Keep an eye on returns, too much will cause overloading of the top sieve.
A kill stop may help identify if you have got sieve loading right, think I am right saying there should be virtually no grain on back half.
May help to get sample of the chaff coming over the sieves while in action , but take great care!

The one in question is dronninborg designed and built. Same essentially as the previous 30 40 series.
Just new tinwork really.

 

[Exfarmer]

The one in question is dronninborg designed and built. Same essentially as the previous 30 40 series.
Just new tinwork really.

thanks, I was unaware, was this built in Italy?

 

[jerseydan]

Drove a 40rs years ago that had the same problem. It came down to the concave not being level on both sides. Somewhere in the book it said you should set the concave to a certain number and check there is an 8mm clearance between it and the drum. You can adjust the concave to level it up. Solved the problem for me. Before that it was shovelling grain out the back.