new holland haybine

rldck20 · Sep 17, 2016

i have a new holland 116 swather that has the double knife set up and was wondering if anyone on here knows what the timing of the knife sets is suppose to be and how to go about getting this thing back in time.

Bob · Sep 17, 2016

This is NOT NH specific, but typically, a "wobble box" at either end is driven by a cog belt or a roller chain and the knives are timed by resetting the belt or the chain so that the both knives reach the outer end of their stroke and the inner end of their stroke simultaneously, cancelling out the vibration each produces.

Sometimes, it's not possible to get them set EXACTLY, but they still operate pretty well if they are a LITTLE off.

rldck20 · Sep 18, 2016

cant i do the same ting by removing one of the drive shafts coming of the drive pulley and setting one knife and then the other?

Brown Swiss · Sep 18, 2016

If it is any thing like a 499 the sickles should go out away from each other at the same time then come together. Only way I can see it getting out of time is there should be a shaft right behind your cutter bar that ties the two together, if something happened to that shaft then it could get out of time! Look under the haybine and should be a round shield covering a shaft!

1370pwr in ne · Sep 18, 2016

What is it doing that you think its out of time? Not cutting in the center properly is the only thing I can think of that would be affected.Are all the sickle sections in place for the center? We have windrowed lots of acres with a 116 and a 1475 and never had an issue with the timing. We sold our 116 to my cousin this spring, if I get a chance I will check it out.

rldck20 · Sep 18, 2016

The right side cut's great but the left side doesn't cut or just goes over and lays the grass down. The blades are good and the head is level so I've been told the timing is off. I watched the sections and they seem to be going the same in and out.

T in NE · Sep 18, 2016

I dont think you have a timing issue. Is there a drive belt slipping under load? Or a sheared key?

rldck20 · Sep 18, 2016

Nothing is sheared and no slipping of the chains

Bob · Sep 18, 2016

Sounds like you have a "knife register" issue rather than a timing issue. A timing issue will affect how much they shake, but NOT affect cut.

"Register" means that the knife should stop at either end of it's stroke with the points of the knife sections just beyond the centerpoints of the "prongs' on the guards.

Some mowers/windrowers/haybines have a means to adjust knife register, but I don't know if yours does.

However, if the knife that doesn't cut well has been replaced, (or it's knifehead), that may be where the trouble is.

Measure the length of the knifehead from where it attaches/is driven to the center of the first knife section, and compare that measurement to the other side that IS cutting properly and see if there's a difference. (Obviously, the left and right knife heads are opposite/mirror images of each other.)

rldck20 · Sep 18, 2016

Ok that sounds reasonable. They aren't adjustable so if they are not the same as far as measurements,what would be your thoughts.

Bob · Sep 18, 2016

Someone MAY have replaced a knife or a knifehead with the wrong one/one meant for another application. I have seen that more than once.

bison · Sep 18, 2016

These knives are supposed to run opposed to each other and meet dead center in the middle with 2 or 3 sections over lapping each other.
You may have to loosen a U joint on one side( where they connect to the roller) and turn that drive shaft 180 degree to get the knives in time.

rldck20 · Sep 18, 2016

Thanks for all the help. It was a register issue. Adjusted and cut until it rained.

1370pwr in ne · Sep 18, 2016

Are the rubber bushings in the head of the sickle and in the drive line right by the sickle head all good? If one of those is out the sickle would'nt have full travel under a load. Maybe a bearing out by the wobble box or in the box not allowing full travel under load.Either one of these things should cause a loud hammering noise. Is this haybine new to you?

new holland haybine

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