Case ih 8309 discbine blades

[ACIN]

New to me 8309 discbine, bought about 2 weeks ago ran it , works like a charm. New blades and hardware put on during the rain delay. Ran it last night on few acres before getting after it today. Today within the 1st 5 or so acres made a few clicks then vblade flew out. Did this 4 times. Used all new spares so had to shut down, ill try to post pic, all hardware still there just blade breaks off, never seen this. Junk blades???

Help????

 

[Brendon-KS]

Where did the blades come from? To have that much hole stretch and resulting breakout in a few acres means those blades are no good. Good blades can get worn down on both sides (which typically takes hundreds of acres) and the hole will still be round. I recommend only Radura (first choice) or Kondex blades.

 

[ACIN]

Where did the blades come from? To have that much hole stretch and resulting breakout in a few acres means those blades are no good. Good blades can get worn down on both sides (which typically takes hundreds of acres) and the hole will still be round. I recommend only Radura (first choice) or Kondex blades.

 

[ACIN]

View attachment 155872

Radura 42050

 

[Brendon-KS]

Interesting. Something is wrong somewhere as what you're describing just shouldn't happen. Radura knives have been used exclusively as the factory-installed parts on Hesston-built mowers (your mower is the same as the Hesston 1320) and rotary headers for decades and I've never seen them tear out the hole like that. The knife in the picture has obviously been hitting something hard right at the end. I would take a hard look at the disc timing as if that is off it could be allowing the knives to hit each other which could cause bad stuff to happen. Turn either end disc to be square with the cutterbar then inspect each disc down the bar - they should all be at right angles to their neighbors. No matter how you turn the discs you should not be able to get contact between the knives.

 

[ACIN]

They are timed at 90 degrees to each other. Can spin by hand and nothing seems to hit. Runs pretty quite on tractor until right before blade came flying out. Happened on every blade I lost today I assume????

 

[trackrat]

that blade has hit something hard; I have no idea of what but something find out what, before one of those blades takes out a rear tire or something

 

[rockcreek4630]

I have not been around hesston I would like to see the bolt holding that blade in . To me the broken part of the blade where it came off does not look big enough gap. Are you sure you have the wright shoulder bolts.

 

[paul]

As others say, the end of that blade looks like 100s of acres, not 5 acres, it is hitting something hard, something not right.

And the busted hole is very odd, were the blades still in their proper location you took the bold out, or did the blades actually fall out? Are you using the right bolts?

Only other thing I can think of if that batch was hardened wrong and the metal is crystallized, but the chopping end looks like it is holding up to more abuse than it should, not sure why the hole end would be cracking. Nothing extra special about Germany but typically they manufacture to good standards.

Paul

 

[Brendon-KS]

You should have this special nut on the underside of the disc. The flats engage with the slot in the disc and the knife rides on the round portion, captivated by the large flange on the bottom. A 7/16" bolt goes down from the top with a cupped piece as a washer. Is this the hardware you're using?

 

[ACIN]

follow up on the blades. Changed them all to the herschel Adam's from rural king, mm owed 45 or 50 acres with zero issues. Definitely junk blades, gonna send pics to supplier for their FYI. Thanks for all responses