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New Holland 268 baler

1

1939farmall

Member
I think Im ready to test my 268 baler. Ive got it in time per the book. Im planning on running this behind my Farmall M, the book says it should run at 70 strokes per minute. I have no idea what my throttle setting should be. Im thinking of starting at slow speed and bump up till I get to 70. First test will just be PTO engaged and check plunger and carrier. Im surprised that I feel a little nervous! Big difference between turning by hand and running it on the tractor. I guess well see what happens!
cvphoto126961.jpg
 
Your 70 strokes will probably be at about 535-540 PTO RPM. it may take slightly more unloaded rpm to get the 70 strokes when loaded due to tractor slowing slightly under load. Note most


PTO driven tools call for either 540 RPM on older units or 1000 RPM PTO on newer high horse power equipment.
 
Always ran our 24T JD at 60 spm with a 630 Case diesel. Put a paint mark by the throttle lever where the speed equaled 60 stp. Less slam bang on the baler and still did a good job...seldom missed a bale.
 
Star right now and waster a full can of wd40 all over the knotters . Have you let some one turn the flywheel and tripped the tie unit to see how it did. Needles need to come up and activate the tie stroke.
 
I agree with jm. See how the knotters are before hooking it to a tractor. As far as strokes per minute and pto speed you will be running the m at full throttle, or close to it.
 
I dont know what experience you have with square balers, but take a look and be sure that the stop block that protects the needles is jumping into the chamber in front of the plunger, when the needles enter the chamber to feed the twine to the knotter. Many sets of needles get broken off because this stop block isnt working, and if the brake on the knotter slips and lets go if the needles at the wrong time, the plunger will snap them off.
Your tractor will probably need to rev at right around 3/4 throttle to give you the 540 pto speed. You dont need to concern your self about making your baler make the plunger make a certain number of strokes per minute. Your baler is designed to be operated at 540 pto revolutions. Once the pto is running at 540 , the gear box on the baler will determine how many strokes per minute the plunger will make. Most older balers only did right around 60 stokes. I remember new high capacity balers doing 90 strokes, and they were just hoping, and most shook them selves into the scrap yard early.
 


Have you noticed the huge flywheel on the front? Don't make the common "newbie" mistake of removing the flywheel. That is what you are effectively doing if you get your RPMs too low, and it puts tremendous strain on the machine. There is nothing wrong with running as much as 10% low, but too much and you will be getting into metal twisting loading by removing the inertia stored in the flywheel.
 
I agree with 300jk. Tractor will be only slightly less then full throttle. We baled with a JD 50 no tach. Pa had a handheld tachometer for the cylinder speed on the a-6 combine. He put it on the pto of the 50 and determined 540 was slightly less then full throttle. Run through a tying cycle by hand without twine. If everything looks good put the twine in and run it right up to full speed for the very first bale. If something is not right you will have the trouble weather your running it slow or fast and running slow breaks shear bolts. Always run the baler at recommended 70 strokes. I thought the number 68 in the model 268 stood for 68 spm. I have a NH 65 and the 65 stands for 65 spm. Model 370=70 spm. Anytime someone says their baler is shearing flywheel bolts my first question is are you running it 540 rpm? Their answer is always no. I run it slower so the knotters have more time to do their thing. Any baler will always work better and less problems running 540 pto. That's what they were designed to do.
 
Since you checked the timing, I assume you also read through and completed all other checks in the book. Things like adjusting the slip clutch, lubricating the over running dogs and ensuring the plunger latch is freed up are all important steps.
 
Better to use a spray lube on the knotters than water displacing spray / Use that when you park it for the winter.
 
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