3-Point Hitch 3-point hitch not working

[Woody_NH]

First, I have a John Deere 1050 that has a backhoe and FEL. Recently I took the backhoe off, for the first time, to put on a brush hog. The problem is that I cannot get the 3-point hitch to raise or lower. easy on me.

I have no knowledge of the JD 1050 and how the power beyond works.

On my 3320 there are two power beyond fluid return choices. If no BH is attached, the return is through a short loop and coupling that routes the fluid to the rockshaft for normal 3ph operation. If a BH is attached, the return is though a different coupling point that routes the fluid directly to the sump bypassing the rockshaft. Hence the 3ph will not operate with the BH attached. Suggest you look at the fluid lines and see if the return that you are looped to is in fact routed to the rockshaft.

 

[rully]

We have what sounds like a similar problem mentioned in this thread. I hope you do not mind us hi-jacking this thread to address our own TPH problem on our 2003 JD 4610.

Our tractor came with a Bradco BH when we purchased it. Recently, we have had a need to use the TPH, but after removing the BH and re-connecting the hydraulic lines, we were getting no response from the TPH rockshaft.

Things we have checked:
1) Ensured that there was enough hydraulic fluid.
2) Fully closed & opened the Speed of Drop Value (located directly below the seat).
3) Lifted the rockshaft manually. There is easy movement up and down.
4) Ensured that the rockshaft lever (on right side of seat) was moving up and down to full extension.
5) Both BH (when connected) and FEL work fine, so we suspect no major hydraulic problems.

Our Hypothesis: Wrong hydraulic hose connection. We initially reconnected the fixed line going to the BH to the female connector used for the BH line inflow (See Pic2).

We believe the male connector coming off the tractor should connect to the female connector used for the BH connector (See Pic1). Is this male connector coming off the tractor for fluid inflow or outflow? Since the female connector above is referenced for outflow, we are assuming this male connector is for inflow. Please confirm if our reasoning is correct or not.

Before we purchase a longer hydraulic line and possibly risking damage to the tractor due to wrong connections, we thought we would do a little research here first. Thank you for your insight and wisdom.

 

[kennyd]

Rully,
Welcome to TBN

The way you have it hooked up now should be correct, that lower coupler is the return-to-tank fitting bypassing the 3PH when the hoe is on. The "loop" is connected properly in the pics for normal operation without the hoe installed.

When you start the tractor, does it idle OK or does it sound like it's under load indicating that the flow of hydraulic oil is stopped? If it starts and idles OK, the see if the hose gets warm...

My only other thoughts are that the linkage to rockshaft valve is disconnected, possibly by the previous owner?

I have included a schematic of the PowerBeyond circuit from the JDParts website...

 

[rully]

Kennyd, I appreciate your response.

Our tractor idles fine when it starts indicating to us that there is no added load on the hydraulics. I think your thoughts on the disconnected rockshaft is definitely a possibility. The question is how does one disconnect the rockshaft?

Here are a couple more possibilities/ideas and my own questions about them:
1) My research on other forums indicate problems sometimes arise due to a clogged filter or screen somewhere on the hydraulic system. Where are the filters and this particular screen in question located?
2) Is there another lever that switches the hydraulic flow between the BH lines and the TPH rockshaft?
3) Is there a lever for rear and mid-point PTO that could be causing the TPH system not to engage?
4) Is it possible that the PTO can still spin without the TPH rockshaft able to lift?

We are the second owners of this tractor. I will see if we can locate the original owner(s) to see if he or she knows something about his issue. Thanks for your input. Arrggghh!!!

 

[dlatzko]

I am having the identical problem. I am the original owner of a 4300 (circa 2002). The dealer installed mt 447 backhoe two years ago, and today I tried to take it off for the first time. The rockshaft will not work. Has anyone here solved this problem? It worked just fine before the installion of the backhoe, and I have followed the removal instructions to a T.

 

[JohnDeere4300]

I am having the identical problem. I am the original owner of a 4300 (circa 2002). The dealer installed mt 447 backhoe two years ago, and today I tried to take it off for the first time. The rockshaft will not work. Has anyone here solved this problem? It worked just fine before the installion of the backhoe, and I have followed the removal instructions to a T.

I don't know if you checked any of these.

"3-Point Hitch Fails to lift"___(Check)

* Low oil level*
* Hydraulic stop valve closed*
* Hydraulic oil too cold*

( Hydraulic oil suction screen clogged)

 

[dlatzko]

I read the manual last night and I am going to check the hydraulic oil today. The sight glass is completely blocked by the backhoe. Can I do it visually through the cap, and also is there a easy susbstitute for the JD recommended hydraulic oil?

 

[JohnDeere4300]

I read the manual last night and I am going to check the hydraulic oil today. The sight glass is completely blocked by the backhoe. Can I do it visually through the cap, and also is there a easy susbstitute for the JD recommended hydraulic oil?

You can still see with the BH on.

You need to look at the sight glass.__( Can't see through the cap)

I only use JD oil..____ Someone else might know a different kind of oil.


If it has oil,.._Then it might be the hydraulic oil suction screen clogged.

 

[dlatzko]

OK, thanks for the direction. I will hunt for the sight glass today, wait until I can get the JD oil, and check out the suction screen after that. if the above does not work.

 

[kennyd]

I am having the identical problem. I am the original owner of a 4300 (circa 2002). The dealer installed mt 447 backhoe two years ago, and today I tried to take it off for the first time. The rockshaft will not work. Has anyone here solved this problem? It worked just fine before the installion of the backhoe, and I have followed the removal instructions to a T.

I am gonna guess that you plugged the "loop" hose back to the same place the hoe was connected? If so, then that is why your 3PH does not work. There is another return QD's that feeds the 3PH-it's NOT used when the hoe is on so the 3PH is bypassed.

Look at the schematic I posted above.