Raising the 3 point the loader also rises

[Bobog]

Good day all. I

have been a long time reader but this is my first post and hoping that someone here can help as I am not finding the answer anywhere.

I have an older Branson 2400 with a BL00 Loader we got used 2 years ago. The issue we are having is when raising the 3 Point the loader also rises. We have been having this problem since we got the tractor. I've been working around it by lowering the bucket when it gets too high or letting it rise to the top when running the box blade on the driveway.

We have verified all the hydraulic lines are ran correctly. The only thing I see that might be out of place is one of the pistons at the top of the valve for the loader is not level with the other pistons, don't know that it matters. If I hold the joystick forward making it level everything seems to work as expected, but I do not see a way of adjusting it. (Photo Attached). I don't even know if there is one, or if this is the issue or not.

I' m hoping someone has an idea on what is causing the issue and how I might go about fixing it. I am at my wits end.

 

[ericm979]

It sounds like the upper spool is for the loader raise/dump circuit. It's not seating in the fully closed position. When the 3pt is raised, especially if there is an implement on it, there is back pressure in the system. That sneaks past the slightly open loader spool and raises the loader.

It might just be a detent in the valve that is not working correctly. Maybe it's stuck or the spool itself is worn where the detent seats. Having to work against the weight of the joystick can't help.

 

[Bobog]

Thanks for the quick response idea. I agree, it is like it is slipped past into the loader and yes it is worse with an impament on. You describe the issue much better than I did. Thanks

Taking the joystick off didn't seem to help get it to go down so i dont think it is a pulling issue with the weight of the joystick. Using a pare of pliers to move the valve up and down feels tight in both directions and returns to the center point with a touch of a snap. Feels just like the curle ones does.

How would I go about checking for the detent. Do I need to figure out how to remove the plunger on the valve to inspect it or is there an adjustment that wouls allow me to to adjust for center?

 

[oldnslo]

Did the float feature detent properly on the raise lower spool?

Occasionally the can on the opposite end of the from the joystick can fill with crud restricting spool movement. One of the first signs can be the float detent no longer works or is very difficult to engage.

The centering spring mechanism is also inside this can. Use caution if you decide to remove this can since there could be spring and detent balls wanting to fall out.

 

[Bobog]

That was a great thought. The float works without fail and as it should. The centering (spring return) seems to go back to center without fail as well.

 

[oldnslo]

Bobog
In the picture on the first post which spool is the raise lower spool. Which way does this spool move to raise?

 

[Bobog]

Updating the image with orientation of the loader valve, adding some notes to the first image, and providing a loader Assembly diagram for a loader that is close to what I have.

If you pull the joystick back towards you the (The Seat) the loader will rise. If you push it forward the bucket goes down.

If I hold forward with just a little bit of pressure to keep the spool level with the anchor point the 3 point does not cause the loader to rise. As a side note, bucket curl spool which is closer to the steering wheel (unseen in the picture) is level with the Anchor Point.

In the Assembly diagram, I believe the one I am having issue with is #2. I am new to going this deep into a valve so please be kind . I am unsure how to remove the spool, and as you said, don't want to have parts fly all over the place. That said I am happy and look forward to learning new things.

Appreciate the patience and support

 

[oldnslo]

Bobog
Should be no need to remove the spool completely. I would start by carefully removing the centering spring cover on the lift spool and inspect those components to see if something has worked loose or looks out of place. What I do not know is if any parts will fall out when you do this.

 

[Bobog]

3rd grader here, Spring cover, would that be #4 on the diagram?

 

[oldnslo]

Yes item 4 in the diagram. Looks like two bolts hold that cover. I would suggest slowly loosen both screws an feel for spring resistance on that cover. Looks like centering spring assembly should be captive on the spool but suspect will be some spring load on that cover that should decrease to little or no load as you remove the screws.

I do not see detent assembly on parts break down