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Baler thud

showcrop

showcrop

Well-known Member
My MF 224 which I just had the plunger head out of to adjust the knife to knife clearance now has a distinct thud on every stroke, just as the plunger head STARTS TO RETURN. Of course it has ALWAYS done this to a degree, but it is more noticeable than before I had it apart. all of the connections are TIGHT. NO DETECTABLE PLAY ANYWHERE. I have ROLLED it OVER by HAND. There is NO DETECTABLE SIDE to SIDE movement. The clearance knife to knife is set at the upper limit. I have just finished baling 480 bales with no problem, but every time it is running with no load I hear the thud thud thud. Ideas? By the way, the crop in the last field was 30% over expected, and I ran out of twine. When I went to rebale the eight that came out before I noticed, the old MF took those broken bales in at 4 MPH :D
 
I'm NOT a Baler Guy..........

However,I did spent several decades maintaining equipment with CROSS-HEADS (like a baler plunger). When the clearance between the top of the cross-head/plunger becomes to excessive, the plunger shall Jump vertically on the return stroke causing a THUD. My experience was on Worthington AIR Compressors as well as 9000 HP Clark Compressors,600 HP Ingersoll Rands, and Cooper Bessemer's.

Bob..
 
I'm also thinking top to bottom movement. Haven't looked at my JD, but couldn't imagine it would be any different, but my New Holland 68 is
both adjustable side to side (for knife clearance) and top to bottom to tighten the clearances between the plunger and the bale case. The only
other thing I can think of is the plunger pitman arm to the plunger. My 68 has a bushing and thought it seemed relatively "unsloppy" for a 50
something baler, I replaced the bushing, it was amazingly tight and whatever hammering I had in the plunger went away.

MF224 - IMHO is a mighty fine baler.

Good luck,
Bill
 

I did adjust the top to bottom clearance of the knife by adjusting the height of the left side. I believe that the clearance above the wheel in the track was .015, and I set it towards the minimum. but I suppose it wouldn't hurt to check it towards the rear as opposed to at the front where I checked. Thanks.
 
Is the needle basket returning completely to home position? Manually lift the needle basket and listen to see if the thud goes away. Perhaps a loose connection is allowing the plunger arm to slightly strike the safety needle-arm stop and that is the thud
you hear.
 
I don't know MF balers but could it be hitting the tip of the needle safety stop? Mine on a NH bale got a hair too
close to the plunger and made a hell of a noise but without shearing the flywheel shear bolt.
 
Had a similar thing one time. Sharpened knife, all was fine for a few acres, then similar noise. One knife bolt had worked loose just enough to stick out and catch as plunger went by.
 
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