International 434D hydraulics bumping or jerking

[greggyy]

Posted this elsewhere, but hoping to hear more about this.........


Hi all...looked and drove the inter 434d

All seems not bad

4k for a machine with 4k hrs......

No major leaks it seem....started ok an no odd sounds.

Rear links had weight and machine would bump or jerk every say 10 or so seconds.....is to do with hydraulucs.....if implement put all the way down it stops.....if half way it will bump or jerk machine every 10 secs or so........as I was looking at rear i could see rear implement slowly lowering before the jerk raised it say an inch or so to prior position....

So is this serious ?

I have no idea what position the levers and hydrailic buttons should be in......

 

[LouNY]

That sounds like the 3pt is in position control and drifting down, when it goes far enough the control brings it back up. Could be either a leaking 3 pt valve or piston.

 

[DLTTrekkers]

between your legs(as you sit on the tractor) is a tap. Lift implement and then close that tap . If problem is with the pistonseal it keep on doing that . If not the problem is with all the valves in that rockshafthousing

 

[greggyy]

I do not have a user manual for the tractor or controls, th eguy that has it bought it from a mate and knows how to drive it, but is also not sure of the controls.

However, he did say he had someone fix a leak on one of the taps on the hydraulic under the seat, but has no idea what they are for, it looked like one tap was open and the other closed. I did take some photos, will see if I can post, maybe I can be educated that way.

And yes, when I was watching what it was doing, it has a grader blade on rear and is old solid one, and it would lower a small amount, then the system would lift it back to where it was, which seemed like an inch, due to the implement weight, it was quite noticeable, when on the ground, this did not occur.

The price is good on this tractor, so if it is likely a smaller type problem or job, or just a matter of correct adjustments, or even if I just put up with it if it wont damage anything, but I guess if I do put forks on and have a load of timber etc, you dont want it moving around and dropping pieces as you drive.

 

[DLTTrekkers]

The tap on your leftside is for fast or slow lift. Did you close the middle tap and test it ?

 

[greggyy]

No....I did not as have and had no idea exactly what they do along with various levers for the 3pt link......will see if i can post some shots now

 

[DLTTrekkers]

I can take some photos from the manual and upload it for you as we progres with your problem

 

[DLTTrekkers]

First lift a implenent ....close that tap and see if it still hick-ups. There is a lot of valves in that sisteme. If I were you I would first drain all the oil and clean the filter coming out of the hydraulic sisteme....replase it and add new oil .

 

[DLTTrekkers]

I will help you to repair it step by step

 

[DLTTrekkers]