2600 loader trouble

I just bought a 2600 with a bush hog loader. The loader is very slow to respond to the joystck. i changed the fluids and filter to no avail. The 3 pt still works as it should and my flow control handle works as it should. i unhooked the hydraulic line at the bypass under the seat and pulled the knob out to send fluid to the loader. nothing. however.. in about 3 minutes, just like the delay in the loaders responce to the handles being activated, the fluid started to trickle out. I do not know what is under the converter mounted plate but it acts like it is plugged or has bad seals. any thoughts? thanks... Andy

bypass under seat could be serveral types. one type is aux take off and it has everything to do with the 3 pt lever position and the arms being up or down..

however a true bypass should have pressure on it at all times or your pump is puking out.. but if the pump where bad, you would see delay on the 3 pt raising as well... so something more seems to be going on here..


can you take a pic of the bypass block or valve so we can see what it is??

thx. Bill

any plumbing with QDS in it?

try reseating them.

what is QDS?

picture of bypass

QD's are quick disconnects. when they don't seat fully. or sometiems are mismatched male / female types, they can limit or block oil flow.

I have the picture. Im just struggling to get it to post.

My raise cylinders are hard plumbed. The only QD's i have are to the bucket. The reaction time for both when activated are the same.

thx for the pic.. The made all kinds of hydraulic flow adaptors that fit the 1953 through 1996 models and that looks like it might have come off an earlier series..

And,, they could grab on to any of serveral ports and all do something different..

So.. My first GUESS..

its an AUX Services connection.. meaning that the flow is first controled by the knob... usually 3 positions.. "in" is off, "middle" is both 3 point and aux port.. "all the way out" is aux port only.

AND... the flow is controlled by the 3 point lift lever, so that when it is down, there is no flow,, and when the 3 point is up, there is flow..

AND... when using, if the lift arms are down, the fluid will flow, and when the lift arms all up, they will cut off the flow.

So.. you may have to chain down the lift arms to get flow to the aux port correctly.

It was made for pulling a plow with a wheel(s) in the back so that when you pull up on the 3 point lever, it will send fluid to the plow to pick up the plow so you can turn. and you could also pick up the lift arms to pick up the front of the plow as well... so its kind of complex. knob in, only lift arms go up.. knob in middle, lift arms and aux port go up.. knob all the way out, only aux port goes up.


Now.. if its not an aux service selector and its sits over a different hydraulic port, then it could be totally different..

You can buy a "power beyond" block and it will work correctly for a loader but you MUST return unused hydraulics to the return port on the block so that the 3 point will work. This block goes under the aux services selector and works very well for loaders.

However.. you may have a weak pump and need to rebuild it with a kit so it picks up fluid quickly and flow correctly. If you pump is weak, you also see a delay in the 3 point lift functions. So I am wondering if you have single "lift only" cylenders and when you drop them using gravity, your letting them drain via gravity and getting excess air in them and thats why is takes a bit to lift them?

Hard to dianose but you will get lots of ideals here.

Thanks for the reply.
The tractor was built in 1876. The loader was hooked up at the dealer when purchased new. ( Bush hog 3000).
I was told to raise the 3 point (both the draft and position controls) before pulling out the converter knob. When i first did this the loader ran great. By the time i got it home and warmed it up it slowed to a crawl. Are you recommending i try to lower the 3 point after i pull the converter knob out? I assume i would have to stand on it to get it to lower. I did disconnect the line at the converter with the 3 point up and there was no pressure. The 3 point works great now. As far as i know there is only the one hydro pump on the tractor however when i went to the dealer this weekend to get a hydro filter he had me buy 2. He said there was a second filter under the right foot rest plate. He was wrong. There is only one and it is mounted on the pump on the left side of the tractor by the oil filter.

Is there a risk when removing the converter plate? I would like to take it off to see if there is anything in there blocking the flow. Where does the fluid get picked up in the rear end to go into the pump? I have to wonder if there is a plug in it.

With the hydraulic filter back next to the pump and the crankcase oil filter, that means that you should have the engine mounted gear driven pump. You may have second filter, but if you do it would be on the return line inside the rear end, and you would have to pull the top cover to replace it, but if you have one, and if it is clogged, it shouldn't cause any problems with pressure or flow at the top plate, as it is on the return line and it has a pressure relief bypass valve to allow the return flow to bypass the filter if it gets too clogged.

i do have the engine mounted hydraulic pump as you mentioned.
Do you think the converter itself could be clogged? should i take it off? is there any danger to removing it ? I do not want to simply remove the 4 bolts to lift it up only to find i dissembled it wrong and it falls all apart.

With the selector knob In, raise the lift arms all the way. Lower the arms 1/3 of their travel. Pull the knob Out. Raise the quadrant lever to the top. Loader should work.

I will do this tonight after work. Is this procedure typical for this model?

Guess who,s happier than a kid in a candy shop? MEEEEE! Holy crap it worked. Thank you so much Gatchelguy! When i first mounted the loader it worked ok. It must have been a miracle that i just happened to have done this combo of adjustments. I am certain that without the help from the great people on this site i may have spent hundreds if not thousands trying to figure this out.

THANK YOU!
GATCHELGUY... YOU THE MAN!!!!