Krone rake bent arm help please

[hendrebc]

So this rake has 2 bent arms. Don't know how it happened but they are both bent upwards one quite a bit....

How do I take them out to replace/straighten them? Or is cutting and welding the best option
Was hoping it was just open those 4 bolts and pull it out but it doesn't look look like it.

YouTube isn't very helpful which is unusual

 

[hendrebc]

The bodger in me is wondering if I can just hit them with a sledge until they are straight

 

[JCB_JCR]

My nieghbour has a 4 rotor that has a slide hammer stored in the frame for pulling the arms out.

 

[hendrebc]

My nieghbour has a 4 rotor that has a slide hammer stored in the frame for pulling the arms out.

That's what I was hoping I can't see anything else to open apart from these 4 bolts. Unless you have to open the whole thing up
From diagrams I can find of newer krone rakes there's a thing inside on the end of this lemon tube that has a crank on it and it's stuck to the cams somewhere somehow. Looks like a roll pin or bolt holding it in place. But you can't get at thar without opening up the top.

 

[Blue.]

Jam the rotors then stick a big tube on the bent ones to straighten them.

 

[Zippy768]

That's what I was hoping I can't see anything else to open apart from these 4 bolts. Unless you have to open the whole thing up
From diagrams I can find of newer krone rakes there's a thing inside on the end of this lemon tube that has a crank on it and it's stuck to the cams somewhere somehow. Looks like a roll pin or bolt holding it in place. But you can't get at thar without opening up the top.

You gotta open the whole thing up.
As you say, there is a roll pin in there.

Sorry

 

[davidroberts30]

Heat them up and straighten When warm then paint them after

 

[hendrebc]

You gotta open the whole thing up.
As you say, there is a roll pin in there.

Sorry

I thought so. Most annoying thing is I had it apart not long ago to replace the gearbox at least I know how to do it now.
Thanks. Might try this first see how it goes.

Jam the rotors then stick a big tube on the bent ones to straighten them.

Heat them up and straighten When warm then paint them after

 

[JCB_JCR]

That's what I was hoping I can't see anything else to open apart from these 4 bolts. Unless you have to open the whole thing up
From diagrams I can find of newer krone rakes there's a thing inside on the end of this lemon tube that has a crank on it and it's stuck to the cams somewhere somehow. Looks like a roll pin or bolt holding it in place. But you can't get at thar without opening up the top.

I used to have an older single rotor that had a habit of shearing off the roll pins in the crank inside causing the whole arm to slide out and vanish in the row! Then the crank would jam the cam shearing off the adjuster. I got quite good at undoing the million bolts and dropping it all down to fish it out. Could just about get in with a punch to replace the roll pins without taking the undercarriage off.

 

[hendrebc]

I used to have an older single rotor that had a habit of shearing off the roll pins in the crank inside causing the whole arm to slide out and vanish in the row! Then the crank would jam the cam shearing off the adjuster. I got quite good at undoing the million bolts and dropping it all down to fish it out. Could just about get in with a punch to replace the roll pins without taking the undercarriage off.

That would be more than a little bit annoying

 

[Zippy768]

That would be more than a little bit annoying

As @JCB_JCR says once you are inside, you can jjust about punch the roll pin out. But it is tight going.
I'd be heating that arm up and straighting it. Or a blacksmith job

 

[hendrebc]

As @JCB_JCR says once you are inside, you can jjust about punch the roll pin out. But it is tight going.
I'd be heating that arm up and straighting it. Or a blacksmith job

I'll try straightening it. It seemed to bend easy enough so hopefully it will go back
If that doesn't work, or I f**k it up, then I'll take it apart....

 

[Zippy768]

I'll try straightening it. It seemed to bend easy enough so hopefully it will go back
If that doesn't work, or I f**k it up, then I'll take it apart....

Blacksmith near?

 

[Zippy768]

I'll try straightening it. It seemed to bend easy enough so hopefully it will go back
If that doesn't work, or I f**k it up, then I'll take it apart....

Imo horrible machines. Terrible engineering. Everything seems to hang off one point. Full dismantling to do anything. The stupid long screw thing for the wheel we have replaced 3 times at least. 3/4inch threaded bar with a 1/2 inch hole through it!!!.

Keep threatening to send ours to local scrap machinery auction

 

[hendrebc]

Blacksmith near?

Yeah a good one only a couple of miles away. I've been there today to order parts for a topper and get them to press the bearings on but hadn't decided to look at this till this afternoon when another sheep job didn't take as long as expected.
Try and do most things myself if I can. Heating and bending tjem back sounds like something I can do. And I've taken this rake apart before, but not the arms, so should be able to do this time.

 

[hendrebc]

Imo horrible machines. Terrible engineering. Everything seems to hang off one point. Full dismantling to do anything. The stupid long screw thing for the wheel we have replaced 3 times at least. 3/4inch threaded bar with a 1/2 inch hole through it!!!.

Keep threatening to send ours to local scrap machinery auction

It is an awful machine. I've not had one before and I can't say I like it one bit.
It's always bloody broken it seems like quite a delicate machine. It was broken when I got it and had already had some welding to the undercarriage.
I asked dad how he bent it and he doesn't know it just started knocking so he had to stop. Only thing he thinks is he drove through a bit of a hole in the field with it turned off and it might have pushed the arm up when it was sticking out the back.
Makes a nice row putting 2 into 1 though. But It's too wide really it's a 4.6metre one. A smaller one might be better as there wouldn't be as much weight to break things on it.

 

[Bury the Trash]

try to press /straighten out cold ,i wouldn't heat .
put a wooden prop/stack of concrete blocks whatever. under to support the arm near the bend then hold a half tonne bag of grain/feed /nuts over it with the loader and lower gently or jerkily anyway not too far mind else you will bending them up again

 

[hendrebc]

try to press /straighten out cold ,i wouldn't heat .
put a wooden prop/stack of concrete blocks whatever. under to support the arm near the bend then hold a half tonne bag of grain/feed /nuts over it with the loader and lower gently or jerkily anyway not too far mind else you will bending them up again

I was a but worried about damaging any seals or something that might be in the rake heating bit assumed it would be OK if everyone said to heat it
What's the thinking behind not heating it?

 

[Bury the Trash]

I was a but worried about damaging any seals or something that might be in the rake heating bit assumed it would be OK if everyone said to heat it
What's the thinking behind not heating it?

might lose a bit of strength / just a chance. maybe . heating will make the bending more prescise i suppose. why did they get bent needs a bit of an answer as wellreally surely

 

[David.]

Don't the newer ones have alloy rotor arm housings, that you unbolt and replace like a cartridge?