BX2200 Hydrauilc problems

[okie350]

I posted a while back about my hydraulic lever not returning back to center when I am using it and lugging the engine untill I return it manually to center.

As this seemed to be an intermintent problem I was not overly concerned with it. Things have changed. It is now raising part way, then will lug down like i have reached its limit, then I have to move the lever to the center position and move it to the raised position again. it will move further up then lug again, at which point I start the whole sequence again untill I am high enough to release the lock knob for the MMM. As a kicker, on two sepreate occasions I have had to do the same sequence to lower the MMM.

I have no clue as where to even start trying to diagnois what is happening. and am hoping it is something I can adjust. I have 700 HRs on the BX2200. Any suggestions or experince with this?

 

[oldnslo]

I posted a while back about my hydraulic lever not returning back to center when I am using it and lugging the engine untill I return it manually to center.

As this seemed to be an intermintent problem I was not overly concerned with it. Things have changed. It is now raising part way, then will lug down like i have reached its limit, then I have to move the lever to the center position and move it to the raised position again. it will move further up then lug again, at which point I start the whole sequence again untill I am high enough to release the lock knob for the MMM. As a kicker, on two sepreate occasions I have had to do the same sequence to lower the MMM.

I have no clue as where to even start trying to diagnois what is happening. and am hoping it is something I can adjust. I have 700 HRs on the BX2200. Any suggestions or experince with this?

Are all of these syptoms occuring while trying to raise and lower the MMM?

If yes it sounds like you have a linkage issue since the MMM is gravity down and should have no effect on the engine.

 

[okie350]

No. If the eeck is in the locked position (up) the three point hitch requires the same sequence to raise.

As for lowering, it does not have an effect on the engine but will still need to be be put in center position and then lowered again (it has only done thice twice while lowering) but is doing it pretty regular while raising.

 

[okie350]

really could use some guidence guys:thumbsup:

 

[keyman1808]

How are you other hydraulic functions..Loader ect.??

 

[keyman1808]

Nothing binding on the rear 3PTH is there ?? they work together..at least on mine.

 

[okie350]

I do not have a loader, it is stictly a mower and trailer mover, the three point hitch is not binding that I can see. It has a draw bar attached on it that has been there for 6 years. I cant even see a place where the 3-point would bind up.

 

[keyman1808]

I am far from an expert but there are a couple of things I would check or do. First I would get under the tractor and make sure that there is nothing in the linkage binding it up like a stick or something to that effect. I would also lock my deck at the top possition and make sure that my 3PH works fully up and down as the are on the same circuit. I would also swap out my hydro filters incase they are getting plugged up. She might be starving for pressure. When did you last change filters and fluids?? Could be a bad relief valve too. These are just a few things to start with. Hopefully someone else will chime in with more knowledge than I and help.

 

[okie350]

I have checked to make sure nothing is binding in the linkage, and the prooblem is still there with the 3 point hitch when the mower deck is in the locked position.

As for the Hydraulic filter and fluid. it is past due, by about a 100 hours. Kind of off topic but I was not to worried about changing the oil as the dealer parts guy told me it does not go bad, just change the fliter.

 

[jnjpream]

I have the same issue with the 3pt kicking the lever back to neutral prematurely. I haven't had a chance to look at it yet..

I'll probably get to it when I take the tractor apart to figure out why it looks like I've twisted the frame .

 

[jnjpream]

Took a look at the manual. Looks like the lever is returned to neutral via a feed back rod.. Purely mechanical, not hydraulic at all.

Look at the back right side of the tractor. You should see a plate bolted onto the right side lift arm. As the arm is raised that plate pushes back against a spring on the end of the feedback rod and when enough pressure is exerted on the spring, the lever is pulled back to neutral. Simple enough mechanism..

I'll take a look at the tractor sometime this week or weekend. Guessing its nothing a hose and a can of WD-40 wouldn't cure. At worst, a ledge worn onto the feed back shaft itself (probably from the shaft vibrating against the plate or the spring) may need a file taken to it.

Lemme know if you get a look at yours first.

Jeff

 

[jnjpream]

Diagram...

 

[okie350]

I have adjusted the rod in the past when I could not get the MMM to lock into top position.

The problem is it will go part way up lug the engine,(like when you have fully reached the up position) I have to manually move lever to "neutral" then pull lever back up for 3-point OR MMM to raise a couple more inches. I will have to do this 3-4 times to full get to the fully raised position.

 

[keyman1808]

I would change out the filters and fluid. You said its already 100 hours over. You may have some crud in there retricting flow. Also clean the screen. If that doesnt work the only other options I can think of is a bad relief valve, blocked line (or partially), or the valve is going bad. Also lube up all the linkage if you already haven't.

 

[okie350]

Ok, I will give that a try.

How would I know if i had a bad relief valve, blocked line (or partially), or the valve is going bad? Does this require tearing into the machine or is it external?

 

[keyman1808]

I have never done any relief valve work so I can not tell you. The condition of the fluids and any debris that may be in it will tell you if you could have a blocked line. If it comes out clean and the screen has no shavings on it then I can see no reason for a blocked line unless something got under the machine and crushed or pinched one of the lines. One quick question...did you check fluid levels?? Make sure its full. That may cause it also.

 

[Volfandt]

Took a look at the manual. Looks like the lever is returned to neutral via a feed back rod.. Purely mechanical, not hydraulic at all.

Look at the back right side of the tractor. You should see a plate bolted onto the right side lift arm. As the arm is raised that plate pushes back against a spring on the end of the feedback rod and when enough pressure is exerted on the spring, the lever is pulled back to neutral. Simple enough mechanism..

I'll take a look at the tractor sometime this week or weekend. Guessing its nothing a hose and a can of WD-40 wouldn't cure. At worst, a ledge worn onto the feed back shaft itself (probably from the shaft vibrating against the plate or the spring) may need a file taken to it.

Lemme know if you get a look at yours first.

Jeff

Ditto on the above.
Still sounds like the feedback rod is not adjusted properly.

FYI, lugging when the lever is not return to the nuetral position is normal on the 00 & 30 series BX's (yours is a 00 series).

If possible, return the adjustments on the feedback rod back to where it was before you 1st adjusted it, then see how it operates. IF it needs further adjustment follow the manual precisely to adjust it.
Good luck
Dave

 

[radioman]

Take the tire off on the the left side. take a good look at the linkage as the mower goes up. keep your fingers away from everything and have a helper on other side and raise/lower deck. still having problems? disconnect the top arms from 3 pt and repeat. still having problems? remove mower and take a good look at the lift frame as it goes up manually with your hands after you drop it all the way on dail number 1. chances are you have something binding mower deck or 3pt ram piston.

 

[jnjpream]

You could also completely disconnect the feedback rod from the lever and see if the 3pt goes all the way up without it. There should just be a hairpin that holds the feedback rod into the lever.

That would point to or rule out the rod.

 

[CHDinCT]

The relief valve can be serviced without tearing into the HST. Should be accessible from the rear, but don't know where it is on your BX. You can check the relief valve by checking your pressure with a pressure gauge but without the FEL valve I'm not sure where you'd plug a gauge in. BX pressure should be near 1800 PSI so if your machine goes into relief well below that pressure it would indicate a bad relief valve.