Re: pto wont disengage on my john deere HELP

Posted by JDseller on September 01, 2012 at 19:37:16 from (208.126.196.144):

In Reply to: pto wont disengage on my john deere HELP posted by Justin SE IOWA on September 01, 2012 at 18:25:01:

Justin I am assuming you have a JD 2955. First off the tractor DOES NOT have a torque amplifier. Only IH tractors have that and it works completely differently. Your tractor has a true hydraulically shifted clutch pack or two speed power shift. So when it has a problem, running it in the other range does not really stop the problem is just hides it for a little while. Who ever told you to just do that has cost you big money. You now have other things messed up because of the first problem.

The Hi-Lo problem and the PTO problem are more than likely caused by the same issue. They both share the oil from the charge pump. IF the Hi-Lo clutch pack is slipping/leaking it then starves the PTO and steering. Plus the main hydraulic pump as well.

You should have had the original problem fixed. A Hi-Lo clutch repair is a single split and is not that expensive. The pressure to the steering and PTO was lowered with the problem in the Hi-Lo clutch pack. What probity has happened is that the PTO clutch slipped and warped the separator plates. So the PTO clutch is engaged all of the time. Now you will need to have the Hi-Lo fixed and the PTO clutch pack.

I hope that you did not ruin the Hi-Lo housing. If you had the repair done when it first showed up the plates and separators are less than $200. Even with labor and the other things needed to fix it your bill would been $1200-1500. Now with you running it longer the Hi-Lo pack may not be rebuild-able any more. It gets all worn inside the housing and you can't get it to hold. That complete Hi-Lo assembly is $3400 plus labor. Even if you find good used parts it can easily cost $4-5K to get it fixed now if the pack is shot. That is assuming that the main hydraulic pump is not hurt by being run starving for oil. Plus any metal from the back gets into the main pump and hydraulic system( steering valve, SCV valves,three point valve).

JD 2840, JD 2940, JD 2950, are JD 2955 all have a more complicated hydraulic system that is tied into the drive train because of the Hi-Lo power shift and the hydraulic PTO clutch. So when one system has a problem it can and will cause the other systems to fail. In basic operation they don't seem that different than the Waterloo built tractors but in the field they are more delicate. When you have a problem with them it seems to be more than one system that is affected. They also are harder to work on. I can do a clutch and Hi-Lo on a JD 30 o 40 series tractor in under 12 hours. A Mannheim tractor takes almost double the time and that may not even totally fix the problem.

You need to QUIT USING the tractor like yesterday!!!! The longer you run it the more it is going to cost to fix it. Then you need to have some one that is familiar with these models to work on them. I don't mean familiar with JD. I mean these exact models. They are different than the Waterloo stuff and if you are not real familiar with them you will waste a lot of time and parts/money on getting it fixed. Many JD dealers don't have someone that is real good on them either. You have to have had a few apart to really understand what needs done on them. Some kid fresh out of tech school is going to be lost.

The only way I would repair your tractor would be to go completely through the following: rebuild/replace the Hi-lo pack, repair the PTO clutch, remove and clean the main pump/steering valve/SCV valves/rock shaft controls and piston. Then I could guarantee the job. Not doing the cleaning up of the main pump/steering valve/SCV valves/rock shaft controls and piston just will mean they will fail in the future because of the junk/metal that is in them because of the problems down stream from them. I know the oil is filtered but it is before the PTO and Hi-Lo pack. When they fail if you run the tractor long it will put the junk/metal in the whole system. I have tried to cut corners on them to save guys money. It has never worked. The tractor always has had a failure later that was caused by the original issue.

I know I sound terrible on this but I could record this song and play it fifty times in my life when some one has the problems you have. I would NEVER buy one of the models I listed that I did not know the tractor from day one in its life. There are too many of them that have had problems and just been fixed good enough to have everything work long enough to sell. The last one I did the guy bought it at a consignment sale off a equipment jockey. He used it 5 hours moving round bales. The hydraulic stopped working. It took three filters to get the tractor drove to the barns on to my trailer. The total repair bill was over 10K. He has used it for three years with zero issues. I will guarantee you that if I had not cleaned the whole system out he would not have gotten six months out of it.

Let us know how you fair in fixing the problem.

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