NH 278 Knotter Stop

UP Oliver

Member
The knotter stop on the 278 seems to be my problem, I posted yesterday if you would like to read more. The knotter stop is doing its job, preventing knots on the baler.

Can anyone tell me why that would move? I see in the manual where I can adjust that, but I would like to know why it happened in the first place. The shear bolt did not break, and the bolt on the knotter stop was tight.

Thanks.
 
If the knotter stop is not adjusted correctly it will also allow the knotter to turn too far and needles travel back into bale chamber. Is the spring on the knotter stop?I don't know why it would get out of adjustment if the bolt was tight, but you said the owner was not very mechanical and maybe he thought he was fixing something on it. The knotter stop needs to be adjusted per the manual
 
Thanks. I thought it was tight, but maybe it wasn't tight enough.

The owner never messed with it, this is the first time this problem has popped up since he has had it.

I plan to adjust according to the manual.
 
In the manual it says the stop should be horizontal, but this one is at an angle. Must have got moved somehow.

Thanks again.
 
I have a nh282 but think the adjustments are pretty similar. My knotter stop is verticle so maybe they are different. Mine comes up to an adjustable angle piece. It is supposed to clear that part by about 1/4" I think when tripped, sounds like yours doesn't clear. If you get it adjusted by manual and still doesn't trip there could be something wrong inside the drum where the stop lever attaches.
 
(quoted from post at 12:28:21 08/01/17) I have a nh282 but think the adjustments are pretty similar. My knotter stop is verticle so maybe they are different. Mine comes up to an adjustable angle piece. It is supposed to clear that part by about 1/4" I think when tripped, sounds like yours doesn't clear. If you get it adjusted by manual and still doesn't trip there could be something wrong inside the drum where the stop lever attaches.

My 276 had a problem with this a couple of years ago; but it was the opposite. The activation arm (or lever if you prefer) was missing the stop every so often. The symptom was that I was getting one slab bales every so often. ( Perfect for little goats.)

Anyway, the stop on my 276 had a bolt through it with a slot. It took a little fiddling, but I adjusted the bolt in the stop so that it would miss when the knotter was supposed to actuate, yet still hit it when it was supposed to stop.

I could see where you could have the other problem, where the actuation arm never gets set free, even when your star wheel has rotated to the point of wanting to actuate the knotters.

Yours doesn't have an adjustment?

One other thing to check, hopefully you already did, is the knotter shear pin. The only time my baler made ten foot long bales was when the knotter shear pin broke.
 

The design must have been changed between the 276 and 278. When I had my tiny bale problem, it was so frustrating that I posted about it, complete with pictures of little bales and all, on my FB account. I also took pictures of the knotters and such to describe the issue...

Anyway, I was just able to look back at those pictures, and the stop on my 276 is vertical.

I wish that I could share the picture here...let me see...
 
I was able to download from FB and upload here... a picture of the tiny bales (just for fun) and a picture of the knotter stop on my 276.

In the picture, you see the bottom of the chain sprocket on the knotters. Just peeking out from below the chain link in the center is what looks like an upside down brake pedal. That's my knotter actuation lever.

The vertical plate that it hits (to keep the knotters from actuating) and then releases from (to actuate the bottom) is right there.

You can see that mine had a slotted hole for adjustment.

It sounds like yours may have a different orientation, but the operation should be the same principal of holding the stop to hold the knotters off and releasing to activate the knotters.

Good luck!

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Thank you everyone for your help. A guy down the road has a different NH baler, but everything looks exactly like what I see on this 278.

His stop was horizontal, and so I adjusted it all according to the manual and it seem to work properly. I will see if I need to time anything, and will hopefully run some hay through it tomorrow to be sure.

The pictures help a lot. I will have to go look and see if there is a vertical slot on that stop. I have the horizontal slot on the part the stop is attached to, but didn't notice the vertical one. That would make the last part of the adjustment easier.

Thank you very much again to everyone.

I tell everyone what a great website this is and today proves it again.
 

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