JD 1020 power steering

[historyan1975]

Thanks...

I Will order one...and I will try to fix by myself..

 

[historyan1975]

Hi, Tx Jim...

Today we dissambled the PS valve housing, I will attach some pictures. Now I see that all the 6 O-rings are situated inside the housing. When I will get the new PS repair kit, I am going to change wich is not going to be an easy operation. Do I see correctlly that all rings are included in the kit.
I think that there are some possibble troubles:
- I cannot see but the rings may be used up

- the thick steel ring on the axle are look like a curved and forced, as you can see an the pictures
- one Zieger-ring from the axle is broken. It was broken from a long time ago.

Can you suggest something after watching the attached photos?

Thanks,
J Benedek

 

[historyan1975]

 

[Tx Jim]

Yes all o-rings are in kit. I hope you documented the order of components including shims before disassembling shaft.

 

[historyan1975]

On the whole I know the right order, the pieces are inside a box and I made few photos about them.

I have a question: when I drive the tractor and I rotate the wheel, I can hear when the oil pressure is losing or lover in the PS housing, the housing whirring, buzzing or something like this. And thats when you can observe that an the 3point also the lifting.

In this case where could the oil and the oil pression be lost or bled - on the bottom part of the valve housing near the big oil piston, or somewhere above - ex. near the two valve bodies and the O-rings?!

And - I know that sound crazy - but when I drive the tractor to coast and its lifting a little bit to right side - the PS is working normally continuously. And also when I rotate very slowly. What is the resaon?!

 

[jd110]

In this picture, the plunger in the valve body appears to be stuck. You should be able to push in on plunger on right side and it should spring back. I appears to be pushed in now and not springing back to neutral position. The other valve body should work the same way. If these valves are sticking, this could be your problem.

 

[historyan1975]

So the plunger must move freely and easily... If I put on it screw losening or the graphitic spray I suppose that it is going to work fine.

On the attached photos it can be seen a deformed slim rings - is this a big problem?!

What makes it to operate these valves when I rotate the wheel - ?

 

[Tx Jim]

So the plunger must move freely and easily...

What makes it to operate these valves when I rotate the wheel - ?

The washers when steering shaft is turned put pressure on plunger that jd110 referred to similar to moving handle on a spool valve on a FEL. If plunger is galled I think penetrating or graphite lubricate will not help sticking problem. Keep in mind this plunger has been operating in hyd oil which has very good lubricating qualities.

 

[historyan1975]

As stated above, one of the first wheel of the tractor attacked a big stone in the past. Thats wheen the PS started not to work. In this situation the oil pressure impact can cause an several mechanical damaged on the valves and washers?!

May be possible I have to change both valve bodies?

Maybe than plungers be sticking after the PS housing functioned with a little oil, after I closed partially the oil pipe because lifting problems.

I dont understand why is the new-actually PS housing have the same problems than the old one. May be broken as the old one, too? I dont have any other ideas.....

 

[historyan1975]

Hi,

Last chance - I ordered the JD 1020 PS reparing kit... I hope it is going to be usefull.
But in the techical description there is the above given list- fit for series 20:
1020 (USA), 1120, 1520, 2020 (Europe), 2020 (USA), 2120 (Europe), 3120, 820 (USA), 920,

It is mentioned that it fits to JD 1020 (USA) and it is not mentioned fitting for JD 1020 (Europe). Is this a problem?!