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]

 

[DLTTrekkers]

 

[DLTTrekkers]

I hope this will keep you going for the day ? Do not give up on this tractor.

 

[greggyy]

 

[greggyy]

Ok, I could not post images this am on phone, so am trying now, if they attach and post, shows the valve taps ? and 3pt levers and knobs, also shows what looks to be some sort of brake pedal, also, is this model meant to have a diff lock and where is that ? (maybe in the pics)

Also brake pedal is linked together, but you can slide the link that joins them, I guess this is to aid turning in certain circumstances ?

 

[greggyy]

Ok, so images uploaded....

On the first image, the knob at the right of screen was the one owner said was repaired, as was leaking, the one on left or foreground was in position as shown as this was happening.

You can see it is missing headlights and grill, I am not too concerned about this, engine fired up first go & sounded normal.....

So, even with about, would you consider this a good deal for 4k US & it has some attachments, my thinking is depends on what sort of cost or issues this behavior will incur, if it wont do any damage or cause 3pt to lose all function, then is prob not going to be an issue as will only get occasion easy use on small acres I imaging, I might drag a tree stump or 2 out with the grader blade though if it is able.

 

[dieselscout80]

Ok, I could not post images this am on phone, so am trying now, if they attach and post, shows the valve taps ? and 3pt levers and knobs, also shows what looks to be some sort of brake pedal, also, is this model meant to have a diff lock and where is that ? (maybe in the pics)

Also brake pedal is linked together, but you can slide the link that joins them, I guess this is to aid turning in certain circumstances ?

The pedal in the back below the 3 point controls is the differential lock.

Yes the brakes can be applied individually for turning.

There is a suction screen in the large metal tube that goes in the housing below the seat on the right side of the tractor when facing forward. I would pull that and clean it not you will lose lots of your hydraulic fluid if you don't park the tractor facing up hill.

 

[greggyy]

So too lock the diff you just press.....then when not needed press again? Not in a spot where you can do it whilst in use it seems, so sort of like old 4wd diff lock.

 

[greggyy]

I hope this will keep you going for the day ? Do not give up on this tractor.

Next time I see it owner will expect me to hand over cash

 

[dieselscout80]

So too lock the diff you just press.....then when not needed press again? Not in a spot where you can do it whilst in use it seems, so sort of like old 4wd diff lock.

Correct

On my 424 it will stick engaged sometimes making hard to steer, but it unlocks if I reverse directions and sometimes tapping the left or right brake will release it also.
.

 

[greggyy]

I hope this will keep you going for the day ? Do not give up on this tractor.

Thanks for your help so far, I have re read the post.

Sorry if it was not clear, but tractor is near ish to my work, but I am way too far to just drop over and the seller is away till weekend. So I am just writing a few more things, before I decide to make an offer.

1 Can position control be turned off, or, if left on, and this keeps doing this, is there a downside....i.e wear something out or blow pump etc ?
2 Would you still buy this with either of these problems if it was 1k under others on market ?
3 Seller said, as you sit on tractor, that the tap on the left had a leak, and he got someone to fix it, I just wonder if it is related, the seller is not a tractor person really, he got it from a work mate years ago that went OS
4 what is involved if is piston seal ?
5 what is involve with valves in rockshafthousing

I have reasonable mechanical skills as well, but am not looking for a project or rebuild, if you know what I mean, I already have enough to do, tractor to make less work, not more

Also, in 3rd image, I know main control lifts or lowers, but what do the others do ? I guess I should look for a users manual....seller has no idea.