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Tractor Talk Discussion Forum

MF 1135 Hydraulic and pto

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Ty Lee

02-04-2008 11:30:38




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I recently bought a MF 1135, the 3 point would not lift nor would the pto shut off on the dash. It had a serious hydraulic line leak and I thought it would fix the problem by replacing the line. The power steering and multipower work fine so do the rear remotes. Any one have any ideas?




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Holm

02-05-2008 16:39:12




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 Re: MF 1135 Hydraulic and pto in reply to Ty Lee, 02-04-2008 11:30:38  
There is no clutch brake. The pto will turn without some kind of a load because of the friction in the clutch pack between the oil & clutch discs & plates. It is worse when the oil is cold.I just put a new pto clutch in my 1135 & it turns when there is nothing hooked up to the pto.The control valve for the 3pt.is in the lift cover. That is the piece that the top shaft goes thru for your 3pt.



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Ty Lee

02-05-2008 16:45:52




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 Re: MF 1135 Hydraulic and pto in reply to Holm, 02-05-2008 16:39:12  
Should I be able to stop the pto when it is turned off by wedging a 2x4 against it. Even if it turn all the time I would think in the off position it would stop it. How hard was it to replace the clutch. From what I have heard it all comes out the back but you have to pull the charge pump and cover to remove a snap ring and pull the actual cluth pack out there. How do you release the stuck spool valve?

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Holm

02-04-2008 15:50:42




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 Re: MF 1135 Hydraulic and pto in reply to Ty Lee, 02-04-2008 11:30:38  
You have two separate problems. For 3 pt. problem it sounds like your main control valve spool is stuck the the down position. To get to it you will need to pull the lift cover off. Suggest you get a service manuel to help you do that. The pto is probably drag in the clutch. They do turn when there is no load on the pto shaft. There is a mechanical disconnect on the left side above the rear axle you can push in to stop it.

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Ty Lee

02-05-2008 07:03:35




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 Re: MF 1135 Hydraulic and pto in reply to Holm, 02-04-2008 15:50:42  
I have an IT service manual but it hasn't been much help. I'm sure I can figure out the spool that is stuck. I will check into that. Would the lift cover be one of the covers under the cab? Is there a way to test it (a test port) prior to taking it off? What do you mean by drag in the clutch? I know about the manual shut off in the back and it does shut it off. The pto does spin when on but I haven't checked to see if in turns under a load because I don't have any equipment that takes a 1000 rpm hook up. I did try to turn it off on the dash and stop it by wedging a 2x4 against the shaft. When baling I need to be able to stop the pto in the cab. Does the pto always turn and by that I mean even when you shut it off on the dash? Do these tractors have a pto clutch break?

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davediehl@hotmail.com

02-04-2008 12:48:37




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 Re: MF 1135 Hydraulic and pto in reply to Ty Lee, 02-04-2008 11:30:38  
Two things to check. First is the 5 micron filter behind the grill. This filter takes out the fine shavings and smaller debris coming from the rear end. That is the second thing, there is a screen in the lower housing under the rear end. You will need to drain the hydro fluid and replace a gasket to get to it. If you have the western swing hitch, you will need to unpin that to get in there too.
This is after you verify the lever is in the up position in the cab.

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Ty Lee

02-04-2008 13:59:25




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 Re: MF 1135 Hydraulic and pto in reply to davediehl@hotmail.com, 02-04-2008 12:48:37  
I have replaced the filter and cleaned the sreen below the rearend so this is not the problem. The level is in the up postion and the linkage is hooked up. Is it possible only part of the radial piston pump is working?



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Luke Long

02-19-2008 06:23:40




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 Re: MF 1135 Hydraulic and pto in reply to Ty Lee, 02-04-2008 13:59:25  
You have to jack the cab up and pull rock shaft housing to get to it, a engine host will work. It do's not take much to hang that spool in the valve, scratch, dirt, brake material, etc..As for pump, Your charge pump under the floor board delivers oil to the radial pump. the priorty valve directs the oil to different location, steering first, then I think trans lube,etc.. but not positive sence I haven't read my service manual in a couple years. As for your r-pump, I don't think part of it would work. I think if it had that problem it would be shalling out pretty quick (no pressure). The best way to take the guess work out of it , is to get some gages and with the book check your pressuers. When you checked your screen did you have alot of black disk material in it. the service manual gives possible prpblems and the reasons in one of the sections. My book is a massey factory service manual, I think these books are more indepth than the IT book. I'll read up and get back with you.

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Ty Lee

02-19-2008 06:48:56




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 Re: MF 1135 Hydraulic and pto in reply to Luke Long, 02-19-2008 06:23:40  
Luke, there was a good deal of build-up, metal flakes around the magnet when I changed the fluid. I have an IT manual and it doesn't talk about the spool valve or at least I can't find any thing. I am going to replace the PTO clutch and hopefully fix this valve this weekend. So what you are saying is jack the back to the cab up a few inches (what all do I need to unhook to jack the back of the cab, I lifted the front and didn't have to unhook anything), unbolt the 3 point arms and then I should see some valve down there? I there something hooked to it so I will know what I am looking for. All help is appreciated.

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Luke Long

02-17-2008 12:31:35




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 Re: MF 1135 Hydraulic and pto in reply to Ty Lee, 02-04-2008 13:59:25  
I had this problem about 20 years ago with my 1135, the spool was scratched a little in the 3 pt. valve. Had to pull rock shaft houseing off to get to it. That cured the problem. And my pto does also spin when not in use, thats normal, but if the controll in the cab does not work , you could have some trash blockage in the hyd. line, some times a hyd. line will blister in side and block it under pressure.

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Ty Lee

02-18-2008 06:32:16




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 Re: MF 1135 Hydraulic and pto in reply to Luke Long, 02-17-2008 12:31:35  
Luke,so how does one go about getting to the spool valve and taking it out. Serveral people have told me that is my problem. I think the pto clutch is wrapped because you can't stop it.



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