4400 electro magnetic clutch

young tractor · Mar 3, 2018

Hi guys. This post might get long in order to explain everything. 2 years ago I broke the primary counter shaft. Or should I say a guy I bought it from welded it when he broke it. I had a local well known tractor mechanic fix it. The electro magnetic clutch mounts on the ladder side of the primary counter shaft. This fall it combined corn just fine until the last two unloads. I went to pull the unload lever and it wouldn?t go back to unload. I pulled the seat out and looked. It was hitting the pulleys on the back of the electro magnetic clutch. At the time I figured if I engaged the separator I would have just enough clearance. Today. I looked into it and realized that the back pulleys that are behind the electro magnetic clutch can slide back and forth, thus slide over enough to interfere with the unloading auger pulley. Is that pulley supposed to bolt up to the back of the electro magnetic clutch? What is supposed to hold it in place? I

JD Seller · Mar 3, 2018

The pulley your talking about "floats" on the shaft and only is engaged with the magnet "locks" it to the driver. There are shim washers that go on the front and back side to set the Air gap. The ones you do not have enough of are on the back side against the bearing on the swing arm that carries the Primary counter shaft. You may have either of two things going on. The simplest is that the bearing has came lose and allowed the shaft to move some and that makes the air too much. If you have caught it soon enough you can slide it back and re-tighten the lock collar. The other is the shims washers have worn and you need to install thicker ones.

With it hitting the unloading auger I would bet that you have a lose bearing or mount problem.

young tractor · Mar 4, 2018

Ok thanks. Everything on each end of the primary counter shaft seems to be lining up. What?s the easiest way to tell if the shaft slid? On the floating pulley, are you saying there should be spacers that stop that pulley fro sliding in the way of the unloading auger pulley? It would need to be about a half to three quarters of an inch spacer. The sliding pulley over laps the unloading auger pulley about a half inch. I just happened to be unloading on a side hill allowing the sliding pulley to move behind the unloading auger pulley. Otherwise it might have never happened. How far would you say it should be allowed to slide away from the electro magnetic clutch when it free floats?
I attached a couple photos. One is with it slid over behind the unloading pulley. One is just a close up. The other one is with it slid over where it should be on the clutch

<image src="http://forums.yesterdaystractors.com/photos/mvphoto12063.jpg"/>

<image src="http://forums.yesterdaystractors.com/photos/mvphoto12064.jpg"/>

<image src="http://forums.yesterdaystractors.com/photos/mvphoto12065.jpg"/>

JD Seller · Mar 4, 2018

That gap between your pulley and the magnet should be .030-.050 IRC. So less than a 1/16 of an inch. So yours is about ten times too much at the least.

You need to be looking at the bearing and housing that basically is in line with the unloading belt. The ends of the Primary shaft mean nothing. The sheaves are tight on tapers on one end and a nut holds the cylinder drive pulley. The spacing is controlled with the bearings(#10), eccentric lock collar(#12) and bearing mount(#16). So the mount/bearing/lock collar has moved or some thing is wearing out in there form side loads. As rapidly as you say it happened I still say bearing lock collar moved.

Copy this web address and hopefully it will take you to the parts diagram for the primary counter shaft.

https://partscatalog.deere.com/jdrc/sidebyside/equipment/74452/referrer/navigation/pgId/28216732

young tractor · Mar 4, 2018

Thank you jd seller. Wow mine is off a lot. I appreciate your advice

young tractor · Mar 4, 2018

Jd seller. I?m trying to picture which bearing lock collar moved. If I move the shaft toward the engine side it seems it would slide the electro magnetic clutch closer to the unloading pulley. If I move it towards the ladder it makes that gap larger and would still allow the floating pulley to move a long way. Do you think I need more spacers? Should I be able to see the spacers in there?

JD Seller · Mar 4, 2018

Make sure the mount has not broken or moved in some way. The mount is what holds the primary counter shaft bearing that is right under the unloading belt. Also look and see if the cylinder drive belts are straight on the right hand side. You may have had the entire shaft move sideways.

young tractor · Mar 4, 2018

Ok thanks. I hopefully I can check tomorrow. We?re supposed to get thumped with snow tonight and tomorrow. I really appreciate your time

4400 electro magnetic clutch

young tractor

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JD Seller

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young tractor

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JD Seller

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young tractor

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young tractor

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JD Seller

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young tractor

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