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JD 60 HYD PROBLEM

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JDJACK

04-13-2002 19:34:42




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BACK IN DECEMBER I WAS WORKING ON THIS TRACTOR, THAT THE LOADER WILL NOT LIFT. ONLY HAD 500 PSI. NOW THATS IT WARMING UP I CAN WORK ON IT. HAD TRIED DIFFERENT PUMP AND POWER-TROL. DIDN'T MAKE ANY DIFFERENCE. IT DOES HAVE LIVE PTO AND HYD. MY QUESTION IS, CAN I REMOVED THE REAR HOUSING AS ONE UNIT. OR DOES THE PTO CLUTCH PACK HAVE TO COME OFF FIRST. THINKING THAT THERE IS A PROBLEM WIHT THE LIFT PISTON OR O-RING.DOES PTO SHAFT JUST SLIDE IN A COUPLER?
ANY SUGGESTIONS ARE HELPFUL. THANKS.

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Tye

04-14-2002 07:27:01




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 Re: JD 60 HYD PROBLEM in reply to JDJACK, 04-13-2002 19:34:42  
JDJACK, You can buy a power-trol video that is well worth its weight in gold from this website. It's in the video section. I have it, and it covers every little detail about the powr-trol unit except the pump on the 50,60,70. It's a very good investment.



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Clooney

04-13-2002 20:52:04




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 Re: JD 60 HYD PROBLEM in reply to JDJACK, 04-13-2002 19:34:42  
JDJACK, you shouldn't have to pull the rear housing off to replace the rockshaft piston "O" ring, just pull the power-trol box off. ~Are you loosing fluid from the power-trol system? If not the cylinder to rear housing gasket isn't leaking.
~You can test the "O" ring by putting a load on the lift arms then raising the load & closing the throttle valve (back the screw out until it doesn't keep the valve open) if it doesn't leak down the "O" ring is good, if it does leak down you could have a bad "O" ring, or cylinder to housing gasket, or power-trol to housing gasket, or throttle valve, or porosity in the casting.
~If you use the correct hose adapters (closed fronts), & the "O" rings in the power-trol where the adapters fit are in good shape & don't leak, the oil going to the loader doesn't even get to the rockshaft cylinder due to the closed front ends on the adapters..... .....

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JD JACK

04-14-2002 09:31:09




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 Re: Re: JD 60 HYD PROBLEM in reply to Clooney, 04-13-2002 20:52:04  
WHEN I HAD THE POWER-TROL UNIT OFF BEFORE, I DIDN'T SEE HOW THE LIFT PISTON O-RING OR GASKET COULD BE REPLACED. IS THERE SOMETHING THAT I AM NOT SEEING? I DON'T BELIEVE THAT I AM LOOSING FLUID. THE HOSES ARE PLUMBED OUT THE SIDE OF THE POWER-TROL. I DON'T THINK THAT IT IS IN THE POWER-TROL UNIT, BECAUSE WE HAVE TRIED TWO OTHER ONES THAT WORKED THE LOADER. THE LOADER WILL LIFT BUT IT IS VERY SLOW, AND SEEMS SPONGY, LIKE IT HAS AIR IN RAMS. I AM THINKING THAT IT IS IN THE PUMP,
BUT DAD THINKS IT IS THE TRACTOR. (HAVE TOO TRY HIS WAY FIRST). HOPES THIS MORE INOF HELPS. THANKS.

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Clooney

04-14-2002 10:04:28




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 Re: Re: Re: JD 60 HYD PROBLEM in reply to JD JACK, 04-14-2002 09:31:09  
JD JACK, if you don't use the side plumbing & use the rear power-trol hose adapters with 'closed front ends' you will eliminate the rockshaft cylinder from the circuit & could completely remove the rockshaft piston & still have the remotes work. The "O" rings inside the power-trol valve where the hose adapters seal must be sealing & not dried out & hard though. If those "O" rings are leaking, the remote oil pressure could be returning to the sump before activating the remotes (this could be happening even with the side plumbing)
~Have you adjusted the metering screw for remote operation? If not that should be done to allow full system flow to the remotes. If the screw is turned out too far you will have very little flow to the remotes
~To answer your question, remove the power-trol valve housing, then un-wire or remove the cotter pins holding the crank arm pins in, then remove the crank arm pins, then pull the outer rockshaft bearings (3 bolts on the outer ends of the rockshafts) then pull the shafts out of the crank arm, then blow a little air into the pressure hole (bottom right of center) & the piston will come out, be careful & use low air pressure or that piston will come out with force.
~If you need a picture let me know & I will E-Mail you a scan.

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JD JACK

04-14-2002 19:08:29




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 Re: Re: Re: Re: JD 60 HYD PROBLEM in reply to Clooney, 04-14-2002 10:04:28  
THANKS CLOONEY, I PULLED THE PISTON OUT. O-RING LOOKS GOOD. I FIGURED THAT I JUST GO ALL THE WAY.
I PULLED THE REAR COVER OFF, GOING TO REPLACE THE GASKET FOR THE CYLINDER, JUST TO BE SURE. AND WILL BE PUTTING NEW O-RING IN. ANYTHING ELSE THAT I SHOULD BE LOOKING AT?
I THINK THAT IT IS A PUMP THAT HAS FAILED, SINCE THIS PROBLEM CAME ON SLOWLY. THANKYOU FOR THE INFO.



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Joe

04-13-2002 19:37:30




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 Re: JD 60 HYD PROBLEM in reply to JDJACK, 04-13-2002 19:34:42  
Might check the hydrolic cylinders on the loader. they might need rebuilt. but, the pto does just slip into a coupling.



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JDJACK

04-13-2002 19:57:15




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 Re: Re: JD 60 HYD PROBLEM in reply to Joe, 04-13-2002 19:37:30  
TRIED LOADER ON DIFFERENT TRACTOR, WORKS GREAT.



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Joe

04-13-2002 19:58:37




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 Re: Re: Re: JD 60 HYD PROBLEM in reply to JDJACK, 04-13-2002 19:57:15  
ok, then it probably is the leather seal on the back of the power trol. that would cause it not to get enough pressure to lift a load.



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JDJACK

04-14-2002 09:34:17




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 Re: Re: Re: Re: JD 60 HYD PROBLEM in reply to Joe, 04-13-2002 19:58:37  
WHAT LEATHER SEAL? REMEMBER THAT THIS IS A UNIT THAT WORKED ON A DIFFERENT TRACTOR. WE HAD BACKED THE B TO THE 60 WITH LOADER. PLUGGED HOSES INTO B.
LOADER WORKED GREAT.



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