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Farmall & IHC Tractors Discussion Forum
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1086 no Hydraulics

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Mitch D

12-02-2015 05:36:32




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Got the neighbors 1086 in the shop, it is a 1981? Guess that year is different. Lost power to his SCV's when baling stalks. Pulled the side pump and took it to IH for a rebuild and learned it had a shaft twisted off inside so that for sure had a problem. Now we got the pump back and installed (funfun) but still have no power to SCV. The 3point will slowly lift and you can feel slight pressure going to our pressure gauge plugged into the SCV but it don't register anything.
Dealer said something about a cover with 4 bolts and a ball and spring behind it but that's about all they could tell us. Can anyone else chime in with some advice (and pictures) We are JD guys so this is not as familiar as a 4020....

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Jim Naden

12-03-2015 18:00:48




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 Re: 1086 no Hydraulics in reply to Mitch D, 12-02-2015 05:36:32  
Quoting Removed, click Modern View to see

X2

To expand a little...

Until you isolate the pump from the system and are able to manually control the output to see if the pump is functioning properly you are just shooting in the dark...blindfolded.

What the test kit does is block off the oil passage to the tractor and sends all output through the analyzer and flow rater.

If this test shows the pump is flowing at full capacity and with the proper standby pressures then troubleshooting of the rest of the system can commence.

And, if the tractor was running a heavy PTO load deflection of the live shaft can snap the input shaft of the PFC pump. This was the main reason the conversion kits were originally made available to replace the closed center pump with an open center pump.

Jim N.

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The tractor vet

12-03-2015 07:29:33




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 Re: 1086 no Hydraulics in reply to Mitch D, 12-02-2015 05:36:32  
Well with the PFC system if you do not have the proper test equipment you can play around shooting in the dark forever. This system has to signal the pump to make it work. It maybe just a speck of dirt a small piece of metal shavings stuck in the orifice . It could be a crack in the pick up tube in the rear end , might be like Pete said the seal between the pump and the filter. I am not the expert on this system and i do not have the toys to test it as i need the other piece to hook to my flow rater . So you either can play with it for god only knows how long and ya may get it or you can take it to the dealer and have then hook it up to the proper test equipment and solve the problem .

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caterpillar guy

12-02-2015 17:31:25




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 Re: 1086 no Hydraulics in reply to Mitch D, 12-02-2015 05:36:32  
Try the PTO if it does not turn your problem is farther forward. With the cover under the clutch off you can see if the shaft turns. If it turns smoothly. If the steering and the PTO don't work I would vote for the spline being stripped or about to.



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Dan Robinson

12-02-2015 14:36:17




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 Re: 1086 no Hydraulics in reply to Mitch D, 12-02-2015 05:36:32  
Have you checked the filter first?



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pete 23

12-02-2015 13:54:13




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 Re: 1086 no Hydraulics in reply to Mitch D, 12-02-2015 05:36:32  
When you installed the pump, did you install the short suction tube after pump was bolted up and insert it from the filter side. Do you have a good seal in the rear frame that the suction tube goes through. That seal has to grip the tube to keep air out of system. Also, is the whole pump new with compensator etc. Because you said the system was a little different I assume you have the piston pfc pump and not gear pump so there could be several different problems.

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Dan Robinson

12-02-2015 10:35:20




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 Re: 1086 no Hydraulics in reply to Mitch D, 12-02-2015 05:36:32  
Have you checked the filter first?



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Mitch D

12-02-2015 11:04:07




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 Re: 1086 no Hydraulics in reply to Dan Robinson, 12-02-2015 10:35:20  
New oil and new filter



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