New Holland 273 baler Help

NCcattleman

New User
I got out my baler to day to clean it up and service it to be ready for the up coming hay season. I was going through everything went to cycle knotters everything looked to be working fine until I noticed the needles would only go half way back to home position. I would have to pull them back into home position by hand any ideas on what is going on?
 
There is a small extension spring on the knotter drive mechanism, if it breaks or is missing the plunger safety stop is supposed to shear the flywheel bolt. The needles will definitely get out of time if this spring is missing. Make sure the plunger safety stop is adjusted correctly also so it can do its thing if needed.

That said, there are several folks on this forum with vast knowledge on NH balers and knotters. I just try to learn as I go! Lots of good help here.
 
The knotter drive pawl has a return spring on it; might be broken. The pawl also has a roller on the inner end and there is a block on the inside of the knotter clutch half that the pawl arm roller comes up against to actually drive the knotter shaft and needles. All these parts are located at the left end of the knotter shaft behind the drive chain. Roller could be flat spotted, block could be worn out.
 
Could be a number of things.Look at the bevel gears to see if there's a broken tooth.Trip it and cycle it slowly and watch the the linkage to see if it's binding or maybe the brake's draggin.I always lock the plunger on tdc when I make any adjustment.Good Luck.
 
What is going on is the needles will cycle up to the knotters like there supposed to but when returning back to home position they are only going half way. They will only go back until the bar they are attached to is vertical straight up and down. At that time I have to grab the bar and pull it into home position. There are no springs broke it is like it will slip alittle on the way down and not go any futher.
 
It sounds like you have a neddle latch or brake issue. When you run it through a cycle do the needles return to the rear then drop down or stop halfway? If it returns to the rear then drops down try this first: Pull the knotter back until it locks then grab the rod running from the neddle yoke to the arm on the knotter shaft toward the upper end and give it a firm jerk, it should move about one clock position approx. Then try it, I have had this issue in the past and it cost me a service call from the old NH baler man in the area and it straightened mine out. He told me they can get out of place for several reasons. But it is a quick cheap trick, if it doesn't work we will help you any way we can.
 
IHMan73 they only drop half way back down then I have to pull
them back into home position by hand they will not go back to
home position on there on.
 
Get a couple cans of spray chain lube, some used motor oil,paint brush, and your grease gun, and you manual. Grease and lube the heii out of the chains. Blow the entire machine spotless clean.
 

I agree with the others that the trip dog isn't being held in place to power the needle frame through a complete 360 degree cycle. I'll bet the trip dog or TD spring is the problem.
 
If the needle yoke is stopping halfway back I would suspect the whole knotter isn't completing its cycle either. If this is the case then the problem is likely in the knotter clutch, (broken spring, worn or loose roller etc.). If the knotters complete their full rotation and the fingers stop in the middle there is a woodruff key inbetween the shaft and bellcrank that could be sheared but it is not very likely. It is IMPERATIVE that when you check anything these are in order first: 1. Check plunger to needle timing, inside the front cover there are marks that the plunger arm will center between at 12 o'clock. With the plunger there there are punch marks on each of the two cast parts of the knotter clutch, they should either align or be within about an 1/8" approx. IF THEY DO NOT LINE UP find out why. In your case I'd bet that pulling on the needle yoke rod as described in my previous post would put it back in time. Then after cycling it does it again, I'd suspect the knotter clutch.


EDIT
P.S. I forgot to add If you only pull the needle yoke back til it locks and don't reset the knotter shaft by pulling the rod back this problem will persist until you do.
 

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