lely polymat problem. etc

[Bury the Trash]

morning .
must be honest im a bit of a newby to air drilling really more of a box drill chap.
well ive acquired a polymat that's been pulled out of the nettles not used for several years. and the gearing etc all the way to the metering area seems fine, but the actual seed roll will not free up , will turn with a wrench but im sure it would blow the gears etc if it was tried to be used driven by the wheel .
is there a bearing within the big plastic seed roll housing ,that slides in and out ok but the seed roll just wont free up , all the bearings i can see out around seem ok , like on the agitator and on the end of the seed roll shaft,
most other things look in working order like the fan etc . one or 2 sensors might be non functioning ,havnt connected up the electric box yet.to check.
is it worth working on / stripping out , or would it be better to look out for and accord or better condition air drill , as we have quite a lot of small
seeds and grass eed to sow and i want as best precision as possible.

tia.

 

[davidroberts30]

Yes there's a bearing in there
I need a press to open mine,seems like the plastic had swollen slightly
I ended up shaving a couple of thou off in the lathe to make it a tidy fit again

 

[davidroberts30]

Had them binding too

 

[Bury the Trash]

Yes that don't flow in and out too smoothly on thIs one either.
Bit sticky but will move OK.

I guess if the steel of the housing box has got a bit expanded by a bit of rust it will tighten it all up.

 

[davidroberts30]

Yes that don't flow in and out too smoothly on thIs one either.
Bit sticky but will move OK.

I guess if the steel of the housing box has got a bit expanded by a bit of rust it will tighten it all up.

It's all nylon internal
Hence shaving a couple of thou off

 

[Will 1594]

morning .
must be honest im a bit of a newby to air drilling really more of a box drill chap.
well ive acquired a polymat that's been pulled out of the nettles not used for several years. and the gearing etc all the way to the metering area seems fine, but the actual seed roll will not free up , will turn with a wrench but im sure it would blow the gears etc if it was tried to be used driven by the wheel .
is there a bearing within the big plastic seed roll housing ,that slides in and out ok but the seed roll just wont free up , all the bearings i can see out around seem ok , like on the agitator and on the end of the seed roll shaft,
most other things look in working order like the fan etc . one or 2 sensors might be non functioning ,havnt connected up the electric box yet.to check.
is it worth working on / stripping out , or would it be better to look out for and accord or better condition air drill , as we have quite a lot of small
seeds and grass eed to sow and i want as best precision as possible.

tia.

Take it apart and renew the bearings , if you force it it will shred the slidey plasitic bit that run in the flutes of metering Unit , did one last back end ,
you will get bearings any where , And if you need metering unit bits , weavings is where we got ours ,
bearing 117 125 Was tight and twisted up part 121 On the flutes , not hard to do

 

[Bury the Trash]

It's all nylon internal
Hence shaving a couple of thou off

Ah, Being as Nylons not so brittle as some types of plastic.

 

[davidroberts30]

Take it apart and renew the bearings , if you force it it will shred the slidey plasitic bit that run in the flutes of metering Unit , did one last back end ,
you will get bearings any where , And if you need metering unit bits , weavings is where we got ours ,
bearing 117 125 Was tight and twisted up part 121 On the flutes , not hard to do

The long thin part of part121 is what was sticking on mine

 

[bravheart]

We've got a polymat w that lives in the nettles and gets dragged out for the occasional bit of grass seed. Always amazes me how easily the metering system turns and slides much better than an accord. Would say it's well worth getting it refurbished.

 

[Bury the Trash]

all stripped out and bits ordered, the agitator bearings were rough and seized, as was the one inside the plastic parts plus the one on the end of the hex shaft. so will replace 5 ,very easy order as they are referenced in the parts book @ David Roberts not sure of the plastic is a bit tight as well, might be, will probably just smooth them out with emery cloth them well .
rest ok apart from the black rubbery tab that seals against the seed roller will try weaving for that , and some air pipe s need replacing plus the big one from the fan. fan bearings seem all right atm quite what high speed will see them do . is another matter. belts fine and metering drive train is allgood.

might cut off the coulters tubes to let the small seed out broadcast, and with the idea that one day if it runs ok i intend to extend it a few metres but with the same number of outlets , . maybe.

 

[Will 1594]

Got set markers and a 3 m worth of coulters if any one wants any and pipes , keeping mushrooms and stack pipes for drill project , or will scrap them as having clear up

 

[grainboy]

Have this as a breaker if any use,

 

[Bury the Trash]

all 6 bearings renewed on meter box new rubber touge in the base of the seed outlet, thats all new parts apart from a few seed tubes, and main 4 inch wind pipe and and bit of cleaning up smoothing out and it runs sweetly in out and rotating positively,without sticking at all. bit of a time taking fiddle to do though ill be honest.
its a 3m later 3 row s 24 coulter drill but has got 8 spare outlets on the distribution head and 8 spare holes through the hopper so iof i simply add 8 pipes will it be a 32 outlet as simple as that
electric box and all sensors ,wibnd speed low level etc. senosr might not wiork havmnt tested them yet dont know if you can get them
has the heavy duty bout markers they will take seed tubes/ fixings spreader plates i reckon then in theory it could go up to about a 7 metres.

but anyway, it deff will do 4m with the same spacing of the pipes if the above is true, ....as they are now. and fixed to the bout marker arms. which will then fold for transport of course.

 

[bravheart]

I would say yes simple as that but, Is there room on the main coulter bar for another 8 clamps?
Just reread your post is it for small seeds? If so no need to cut the tubes off just undo the spring clip and pull the seed tube off the coulter tube and cable tie it to the side of the coulter tube. That gives an even spread of grass across the 3m. without any rows showing up. Have also seen a short bit of metal tubing the same diameter as the origional coulter tube welded horizontally to the side of the coulter tube then the plastic hoses can be swapped over and held in place. You could add a bit of a spreader plate to that if you wanted.
Going wider not sure how the markers will work and you need a bit of maths to calculate the seed rate for the extra width or different chain drive sprockets. Really wide with y splitters and you might run into airflow and backpressure problems.

Edit. See what your thinking now regarding markers. That might work and be a neat idea wouldn't work as a marker of course. How would you hold them at the same height off the ground?

 

[Bury the Trash]

what does the little black plastic swing over bit do , onm the chart i see it should be located into the groove on the hex drive shaft on the fine settings , seen here in the lower red circle, but is it needed as mine is snapped in 2 and ive refitted so it wont line up with the shaft groove anyway,
iu just cant figure out what its supposed to do .... nothing on normal settings as i see it anyway...

 

[Will 1594]

what does the little black plastic swing over bit do , onm the chart i see it should be located into the groove on the hex drive shaft on the fine settings , seen here in the lower red circle, but is it needed as mine is snapped in 2 and ive refitted so it wont line up with the shaft groove anyway,
iu just cant figure out what its supposed to do .... nothing on normal settings as i see it anyway...

Its when you run small seed setting

 

[bravheart]

After locating in the shaft winding out the meter again a plastic cover is pulled out as well filling most of the flute depth in the metering wheel making the bit picking up the seeds a lot shallower. That gives you more accuracy with small seeds. The whole thing then only winds out about a quarter of it's normal travel.

 

[davidroberts30]

Yeah only 1 position where it all lines up

 

[Bury the Trash]

ah so for small seeds its pretty necessary then,
rather than buy new plastic bit and dismantle all again .
im thinkin maybe line that bit up in the right position on the shaft and drill right through the plastic and hex shaft then use a n r pin or similar to hold it on the shaft where the plastic swing over bit would ,

 

[bravheart]

ah so for small seeds its pretty necessary then,
rather than buy new plastic bit and dismantle all again .
im thinkin maybe line that bit up in the right position on the shaft and drill right through the plastic and hex shaft then use a n r pin or similar to hold it on the shaft where the plastic swing over bit would ,

Have you tried sourcing an original? 3d printing might be an option before you start drilling holes.