NH 640 twine wrap problem

[George Thomas]

When a bale is formed and the arms swing around to wrap the twine everything works perfectly except that when the twine is cut the ends dangle from the end of the arms and are not held in place. When the next bale forms and the arms swing the twine does not wrap. The knives are new. Prior to replacing the knives the problem existed on one side, but now it is on both sides. Any suggestions would be appreciated.

 

[kyhayman]

The knives dont have to hold the twine to function properly. The first thing to check is twine routing and making sure the plugs are still in the ends of the twine arms. They redesigned the ends and the newer ones have a more positive connection to the stop plug than the origional ones.

The next issue is technique. When I initially had this problem my NH dealer told me to make sure I continued to feed hay into the baler until it picked up twine, not to stop as soon as the arms tripped but rather when twine feeding started.

Other than that I can think of a couple of possibles. Twine issues, wet twine, etc and something bent not allowing the arms to get close enough to the bale.

 

[JD Seller]

When your needles are passing through the knotter they should lightly touch the side of the knotter. The wide part of the needle should just clear the bottom of the knotter or twine disks. You will need to cycle the knotters slowly by hand to check this.
If those setting are correct then you need to check the tucker fingers and make sure they are close enough to the needle, usually 1/4 to 3/8 of and inch.
Also make sure that when you installed the twine knives that you did not knock the wiper arm out of adjustment.

 

[Tx Jim]

(quoted from post at 00:41:44 06/12/10) When your needles are passing through the knotter they should lightly touch the side of the knotter. The wide part of the needle should just clear the bottom of the knotter or twine disks. You will need to cycle the knotters slowly by hand to check this.
If those setting are correct then you need to check the tucker fingers and make sure they are close enough to the needle, usually 1/4 to 3/8 of and inch.
Also make sure that when you installed the twine knives that you did not knock the wiper arm out of adjustment.

NH 640 Rd balers don't have needles or knotters

 

[Dsisk]

I have a 640 twine baler and it'll wrap fine but when it gets towards the end to cut one of the arms hits the cutter and it stops it's almost like it's bent down, and if I pry it past it still doesn't swing the arms back. Any help would be appreciated thanks

 

[Destroked 450]

There’s a safety trip to protect the twine arm wrap system, but when it trips the arms will drop and not return
Open and lock the tail gate, with the baler running at idle trip the tie system and once the twine arm drop stop the baler, measure the distance between the twine arms, should be 2 inches minimum. If not the linkage needs adjusted, making this adjustment also controls how far up the arms travel to their parked position.
After the arms are adjusted moved them up by hand and watch to see if they hit the knifes or knife holders, there is an adjustment for how far the knifes open, if a arm hits the knife holder look to see if that holder and bracket is bent down away from the roller more than the other side
I wrapped hay around the starter roll bad enough to bend the bracket down once, had to use a port-a-power to bend it back up for the twine arms are to clear