Having an issue with the operation of my FEL. When 3 point hitch is down the FEL moves slowly. When 3 point hitch is in up position, FEL works normally. What could be the cause.
I would expect the 3 pt hitch to be fed hydraulic pressure from a power beyond port on the loader valve.Having an issue with the operation of my FEL. When 3 point hitch is down the FEL moves slowly. When 3 point hitch is in up position, FEL works normally. What could be the cause.
Is this a new problem that started suddenly, or has it always been this way?Having an issue with the operation of my FEL. When 3 point hitch is down the FEL moves slowly. When 3 point hitch is in up position, FEL works normally. What could be the cause.
I have the same issue, pull back and hold the 3point lift and at the same time operate the fel lift and it goes right up at idle. Let pressure off the 3point lift and it takes 1500 rpm just to move it upwards then it stops and 2,000 rpm for it to barely go up to full lift. Tried changing the feedback rod adj. And made no difference other then movement of 3point. I have a belly mower on now and was wondering if the belly mower could somehow restrict the position of the 3 point lift so the hydraulic flows through the open circuit. The mower is a pain to take off and right now I need the mower more then the fel. It is pretty difficult for me to get down on my old worn out knees so dropping the mower is a long, tedious and painfull proceedure. Will take it off in the late fall. Any thoughts? Seems to me the fel should work with belly mower on.I would expect the 3 pt hitch to be fed hydraulic pressure from a power beyond port on the loader valve.
Rear remotes would also be fed from the same PB line.
Keeping in mind that your tractor has an Open Center hydraulic system............ the implication of this is that fluid is constantly flowing at low pressure but maximum volume.
Until something like a hydraulic valve interrupts this constant flow, the pressure does not rise. Move a control lever and now fluid is diverted into a cylinder and in the cylinder the pressure starts to rise until a relief valve bleeds off excess pressure.
If you have rear remote(s) connected to a cylinder, a remote valve not exactly in the neutral position can be bleeding off pressure on the power beyond line.
The 3 pt hitch will have a Feedback rod mounted to one of the lift arms and tied into the 3 pt valve with a rod. If this rod has fallen off or is mal-adjusted again the pressure can be being bleed off while you are trying to use the loader.
You dont say if the loader operating slowly still has its full strength. I would expect not if the above is correct.
The illustration shows the flow from the pump to the loader valve and then to the 3 pt hitch.
I used the manual transmission illustration just because it is simpler in regards to your problem but it is the same for the HST model except the power steering pump feeds the HST in addition.
View attachment 47447
You need to closely look over the feedback linkage for the 3 pt and its control valve.
View attachment 47448
These problems usually turn out to be something simple so do not go tearing into valves this creating more issues.
Dave
A few details please.I have the same issue, pull back and hold the 3point lift and at the same time operate the fel lift and it goes right up at idle. Let pressure off the 3point lift and it takes 1500 rpm just to move it upwards then it stops and 2,000 rpm for it to barely go up to full lift. Tried changing the feedback rod adj. And made no difference other then movement of 3point. I have a belly mower on now and was wondering if the belly mower could somehow restrict the position of the 3 point lift so the hydraulic flows through the open circuit. The mower is a pain to take off and right now I need the mower more then the fel. It is pretty difficult for me to get down on my old worn out knees so dropping the mower is a long, tedious and painfull proceedure. Will take it off in the late fall. Any thoughts? Seems to me the fel should work with belly mower on.
Can't remember exactly when fel started to act up.
Thanks
Gruh6
7 with power beyond.A few details please.
How many lines on your loader valve, 6 or 7?
Have any hydraulic hoses been replaced on your tractor?
Does your tractor have a hydraulic block with a selector lever #2 on it like the one below?
View attachment 47888
Dave
Thanks ,, I was going to try adjusting the handle on the hydraulic control block but deided to wait for your thoughts, yes it makes the noise till the FEL control valve is engaged then it goes away.I think it's the block valve handle. it's bypassing fluid to the 3ph.
When the 3ph valve is in neutral, it is also open spool, so it dumps fluid straight back into the reservoir, so fluid pressure is 0. When the 3ph is in the lift position and the hitch is fully raised and you hear that hissing, the relief valve is operating and pressure is at, say, 1700 or 1800 psi.
The PB of you spool valve kicks the 3ph out of the circuit when the FEL is raised. You have the same results with 2 different spool valve sets, therefore it is highly unlikely to be the PB valve! The only thing left that could involve the 3ph is the hydraulic control block by-pass valve.
I bet the noise from the 3ph relief valve quiets when the FEL is lifting. That would pretty much confirm things.
I am with Torch on his diagnosis.
Put the lever on the hydraulic block in the implement position and see what happens.
When you bought the new loader valve did it come with the power beyond sleeve or plug installed or did you do the installation.
Where does the new loader valve's TANK hose go to?
Dave
Came with valve but I did the install.Thanks ,, I was going to try adjusting the handle on the hydraulic control block but deided to wait for your thoughts, yes it makes the noise till the FEL control valve is engaged then it goes away.
The brand control valve seems to function properly but I had to buy 4 sae-8 (orb, boss) male to jic -6 male. Weld a 1" piece of steel alongside the oringinal mount and drill 3 holes to mount it. Don't know if this can help anyone since the oringinal valve is no longer avalible. Oh and I had to get the power beyond fitting.
Thankyou again
Will spend some time with the block control valve. Since the handle is in the middle I will try it one way then the other.
Came with valve but I did the install.
Goes back to the top of the hydraulic fill just below the fill cap.
I feel like it's Christmas and I got,,,,my little pony!!!seen it happen before on newer b series with a loader, one of the quick couplers was loose, not coupled all the way.
Now it wil not go forward or reverse.I feel like it's Christmas and I got,,,,my little pony!!!
TRACTORS BACK!!
Moved the valve and of course the wrong way first. But pointing the handle towards the side, at the power beyond line and that quick it was working. Dang you guys are brilliant!
Honestly,,,Thank You, my next move, tail between my legs, was up on trailer ,check book , and off to orange county.
Also thanks for the quick fit reminder, I did check them and they were all good. Although when I changed the fel valve I had one that I thought I had put together but when I did my double ckeck it was not quite seated.
Thank you again , this has been going on for close to a year, I put it off thinking it might be the pump.
Like I said Christmas morning and there's and orange tractor under the tree. Thanks Santa!!!
Gruh6
Ok great advice, I will see what it will take to either switch the control handle or reconnect the hoses.