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New Holland Haybine Knife Assy Question

B

Bill VA

Well-known Member
How easy/hard is it to pull the cutterbar knife assy from a New Holland haybine?

Slides out easy peezy like a hunting knife from a sheath, or typically a bound-up pain in the buttox effort to pull out for servicing?

Just curious.

Thanks!
Bill
 
On my NH460 I had to use a com-a-long to pull it out. The 460 is 9 footer. It also took 2 people to put it back in. One to push/tap on it and the other to sort of guide it into the guards
 
Bill I put new sections in every 3rd year and guards in every 5 years. Most of the time I can reach down clip a pair of vice grips on the sickle and pull mine out, 488 NH
 
As with any sickle machine, if the support bar isnt all bent and deformed, the bar will slide out without excessive effort. Sadly, more often than not, substantial effort is required.
 
Be very careful putting it back in, as Old said some tapping and pushing up or down to get it back in may be required. I had my wife pushing while I pushed up or down to get it to go back in. I just about lost a finger as it suddenly slid in very easy after a clearing one of the ledger plates. Still a little scary to think about what might have been. Be very careful. btw this was on a sickle bar mower, but rings true for a haybine also. gobble
 
I always use a screw driver to help make it fit in good. I NEVER use my fingers since you can loose one so fast you can not even come close to getting it out of the way fast enough. A screw driver does not mind getting nicked but you finger sure will
 

From my experience the key to it is to get the guards all lined up as nice as you can first. Then after it is out get them lined up even better before putting the knife back in.
 


Mine usually come out pretty hard, to the point I have to loosen the hold downs. But my NH's are pretty old and fairly beat. When I put it back in I leave the hold downs loose and then go through one at a time tightening them up. I check the force required to move the knife as I go. I broke a couple knife assys and tore up some knife head bushings not realizing I was getting the hold downs way too tight with the impact wrench. You can't make up for bent guards by torquing the hold downs till the cows come home. The knife should slide without a lot of effort. If things are out of whack it will show. And if you have ancient haybines that never saw a shed, the rust under the hold down mounts will allow the darn things to really cram things up. IMO/IME it's worth the extra time to tighten each hold down only as much as needed.
 
With all of our rocks, I used to have mine out almost daily. Just wrap a small chain around the head and pull. When it hangs up, give the chain a pop, that usually frees it up. If it has sat awhile (probable in April) run it for a few minutes first. Might even oil it. The other guys are correct, if the guards are all bent up and down, it will pull really hard. You will probably have to align them first.
 
(quoted from post at 07:53:55 04/10/17) With all of our rocks, I used to have mine out almost daily. Just wrap a small chain around the head and pull. When it hangs up, give the chain a pop, that usually frees it up. If it has sat awhile (probable in April) run it for a few minutes first. Might even oil it. The other guys are correct, if the guards are all bent up and down, it will pull really hard. You will probably have to align them first.
Click to expand...

Morgan, do you not have the tool for replacing the sections with the knife in place?
 
No, I never got one. I could usually do them in the
field, using the haybine younger as an anvil. Don't
need one now, use a discbine!
 
if it isn"t all bent up and guards out of alignment should slide out easily,,,,any more than that something is bent
 

You used to be able to get a tool for bending guards back more or less straight. I don't know if they are still made. They made one for stub guards too.
 
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