tc40d new holland rear 3 point help?

[smc1]

HI, I have an '03' I think, tc40d new holland and the 3 point lift just quit working. I checked every thing I could think of, including taking the controls apart in the 3 point. Finaly I checked and I have no fluid pressure up to the 3 point. My front end loader works so I know the pump works. Any suggestions would be great. Thanks alot.
Also I took apart the diverter valve and all seemed fine there. The slot is in correct position also.
Thanks
Sonny

[jinman]

This post would surely have been best to post in the NH Owning/Operating forum where more NH interested folks are likely to see it. However, since it's posted here, I'll try to do my best to help. Welcome to TBN. We hope your first post will not be your last. It's a good group here.

You said your diverter valve was working properly. When you set it to the 2 o'clock position, does the FEL quit working? With the FEL not working, does the 3PH still not function?

With the diverter rotated back CCW to the 10 o'clock position, fluid is supplied first to the FEL. If the FEL is not operating, fluid flows next to any rear remotes you might have before going to the 3PH. Do you possibly have a rear remote with it's lever stuck and not returning to neutral? If your FEL works and you don't have any rear remote valves or a power beyond setup for a backhoe, then you should have pressure to the 3PH.

Where did you check the 3PH for pressure? Did you open the banjo fitting to see there was no pressure? Did you check the line where it comes out of the diverter valve? If you have no remote valves, you can remove the blanking plate to see if you have flow there, but it will be rather messy and you'll need to keep up with your o-rings. I suppose you could have a leak in an o-ring inside the blanking plate that could cause fluid to bypass the 3PH.

To access all this, the easiest way is to remove the right rear tire and then the support plate for the levers so you are looking at things right out in the open. You may have already done all this and know these things, but I'm just saying them to be sure.

The hydraulic system on the TC40 is pretty straight forward, so this should be easy to isolate. If you don't have pressure getting to the 3PH there is no need to open up and go inside the rear cover. It sounds to me like something is leaking and pressure is never getting to the 3PH based on your post.

[smc1]

Thank you Jinman for the reply, I plan on using this site alot. I just found it yesterday but I looks to be a good place.
As for the tractor. No nothing hooked up on the 3ph. With the diverter valve in the 2oclock position I have nothing, front or back, in the 10oclock position I have FEL But no rear hoist. I removed the piping from the divirter valve to the plate for the 3ph at the 3ph. no fluid came out. So no pressure there. I did this after I removed that plate. I wasn't smart enough to do the simple checks first. lol. I read one forum at another place where the guy talked about a set screw being backed out on the control module for the front end loader, the set screw was behind a plug. I had no Idea where or what that would be. Any way I hope this can shed some light on my situation. Thanks

[jinman]

When you set the diverter to the 2 o'clock position, the FEL is completely bypassed, so no setscrew is going to cause a problem. I think there's a good chance your remote valve blanking plate has leaking o'rings. You did say that you don't have any additional remote hydraulic outlets at the rear of the tractor, right? I think you need to remove that right-rear tire and plate and look at the blanking plate where remotes go. If you need pictures, I can probably come up with some, but I don't have them on this computer.

[smc1]

I'm not sure what you mean when you say blanking plate? I don't have any hook up for a remote hook up. I just have the 3ph and the drive. At the 2oclock position I have nothing, front or back. I have removed the tire and the plate on the side of the 3ph. It had a valve on the inside. I replaced every oring I could find. But then discovered that I had no oil pressure to it. I removed the piping going to that plate that came from the diverter valve. If I rev up the motor I will have a little movement but only if not pressure is put on the 3p hoist it self.
I guess ya pics would help.
And do you mind telling me the story behind your picture?
Thanks again
Sonny

[jinman]

Originally Posted by smc1

I have removed the tire and the plate on the side of the 3ph. It had a valve on the inside. I replaced every oring I could find. But then discovered that I had no oil pressure to it. I removed the piping going to that plate that came from the diverter valve.

Based on what you are telling me, you said there is no fluid coming from the diverter valve. You have already removed the plate where the o-rings are and put new o-rings in place.

I made a mistake. What I said earlier about the diverter valve completely isolating the joystick valve is not true. As long as the piping to the joystick is not removed from the diverter valve and blanks installed on the ports, fluid can still go to the joystick. The diverter valve forces fluid to go to the joystick first when it is turned to the 10 o'clock position. However, when it is turned to the 2 o'clock position, the joystick is in parallel with the 3PH unless the fittings to the FEL are removed and blanks installed. That's the way a tractor without a joystick would work. So your problem could indeed be in the joystick valve. Sorry I gave you bogus info.

[smc1]

Well Jinman, It is fixed.

Thank you very much for your help.

It turned out to be in the joystick. FEL control valve.

If you lift up the boot, you will see a large plug or bolt, bout a size 24mm, remove it and directly under it, inside the valve is another plug a allen screw if you will. It was completely removed or backed out. I reinstalled it and all is well.

Thanks again.

Oh by the way is there a story behind your pic of the sunken tractor?

[jinman]

Originally Posted by smc1

Oh by the way is there a story behind your pic of the sunken tractor?

Sorry to have led you in the wrong direction. My brain was coasting on that one and not thinking about the plumbing still being attached to the FEL when the diverter valve was rotated. The plug you tightened is related to power beyond. With the FEL installed, power beyond is fed to the rest of the hydraulics (3PH, remotes). The internal screw opens the PB port to return so that the fluid is dumped directly into the reservoir instead of to the other hydraulic circuits. When there is no FEL, the ports going to the FEL are blanked off and the diverter valve is rotated to allow fluid to directly go to the 3PH and remotes without the PB circuit of the FEL valve.

My avatar picture is not a sunken tractor. I was cleaning up my pond dam after a dozer had cleaned out the silt. He left me a lot of loose soil and I got a lot of seat time digging out the silt. The slope is so steep that I would dig a trench and leave dirt on both sides of me so the tractor would not crab sideways while pushing to fill the bucket. Once the trench was at the depth I wanted, then I would come back and take out the remaining dirt. See photos.

[smc1]

Thanks for that explanation of the hydraulics. I learn something everyday. I do appriciate it. As for your avatar, that is a neat picture. Sounds like you do alot on your tractor.

[kidr]

Originally Posted by smc1

Well Jinman, It is fixed.

Thank you very much for your help.

It turned out to be in the joystick. FEL control valve.

If you lift up the boot, you will see a large plug or bolt, bout a size 24mm, remove it and directly under it, inside the valve is another plug a allen screw if you will. It was completely removed or backed out. I reinstalled it and all is well.

Thanks again.

Oh by the way is there a story behind your pic of the sunken tractor?

I know this is an old thread but I just had to thank you 2 guys. I had the same problem today and searched this thread.The solution was the same for me. You guys saved me alot of grief.