I just finally pulled the blower after a long winter on my B7300 here in MN. and was mounting up the FEL. Hooked up my color coded lines like I always do and when I try to go up or down loader only moves a inch or two and then bogs down like it does when you reach the limit on either end. It won't curl either when I got left or right. It won't go nearly far enough to mount on to the frame and slide in the pins. I disconnected and connected the quick connects numerous times. All seated correctly. I thought maybe it was low on hydro oil, it read right at the bottom marker on the dip stick, so I changed it out as it was almost to 300 hours. Kubo oil and filter from dealer. No change in FEL movement. Called dealer and he said he had never heard of this issue and wants $105 and hour from the time they leave their shop an hour away. Also my rear blade goes up and down just fine. I've had this awesome tractor for 13 years and it usually drops in, I pin it and away I go. Bad valve? Baffled. Any ideas? Thanks!
FEL hydraulic issue
- Thread starter Kubos
- Start date
Re-check your couplers. Make sure they click into place. Pull and push them fairly firmly to ensure you hear the click. Same thing happened to me. The yellow (bottom one) was not seated correctly.
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North Idaho Wolfman
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L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
First check all three lines that are for the valve.
Then try swapping lines out to the loader.
First swap between lift and curl.
And see what it will do
Then if still stuck try swapping the 2 lift lines and then the 2 curl lines.
Then try swapping lines out to the loader.
First swap between lift and curl.
And see what it will do
Then if still stuck try swapping the 2 lift lines and then the 2 curl lines.
Thanks Wolfman and Grouse,
Tried swapping out all lines in various configurations. Same results, starts to lift about 3-4 inches and then bogs down, stops. No curl. Couplers are all seating fine. I'm at a loss. Read on another site that I should make a quick connect pressure gauge to see what it reads. Anyone tried that and if so, what pressure should it read? Thanks
Tried swapping out all lines in various configurations. Same results, starts to lift about 3-4 inches and then bogs down, stops. No curl. Couplers are all seating fine. I'm at a loss. Read on another site that I should make a quick connect pressure gauge to see what it reads. Anyone tried that and if so, what pressure should it read? Thanks
Just a guess because I don't know if it applies to your tractor. There is a screw on mine to be turned 90 degrees or so when you take off or install the FEL
North Idaho Wolfman
Moderator
Staff member
Lifetime Member
Equipment
L3450DT-GST, Woods FEL, B7100 HSD, FEL, 60" SB, 743 Bobcat with V2203, and more
If it's doing the same thing on both the lift and curl circuits you have a problem with the valve.
If it's only doing it with the curl, you have one or 2 bad disconnects on the valve side of the connection.
If it's bogging down you are getting pressure so it's not a pump or fluid level issue. Is there any chance you have a kinked line? Could the FEL be seized up?
baronetm
Member
Equipment
L3901HST w/FEL, 3rd fnct. BH77 BH, 5' Bushhog, 6' BBL, 42" Forks, WoodMaxx WM-8H
This may have nothing to do with your issue but a little hydraulic system information, I am not a tractor hydraulic expert but do have 40 years in industrial Hydraulic experience, and I am intrigued with your problem.
Pressure and Flow in a hydraulic system are two different things. You can have pressure with very little flow, and flow with very little pressure. No flow, no loader or slow movement. A relief valve or directional valve leaking bye can give you flow but in the wrong place, so little work is done. Your oil can be recirculated within a system and return to tank with worn or defective components. In all my years I replaced very few directional valves do to wear or damage but many pressure relief components for erosion, broken springs, frozen poppets etc. so this is a real possibility.
If your 3 point is working I would concentrate on loader components. I would make sure all valve functions are traveling full travel and with free movement, then I would remove and disassemble the pressure relief to make sure there are no obvious defects.
Since you mentioned the hydraulics seem to bog down the next thing I would check are your hoses and quick connects especially if your hoses are old. I have seen many times the internal rubber in the hoses break down and literally plug the line, usually in lines ½” or smaller, the same effect as a severely kinked line. This condition also happened in hydraulic lines that were bent beyond there minimum bend radius causing the hose to break down prematurely. In some cases the function would work in one direction and not another, in a few no function at all. The system could create pressure but your cylinders would not move or they would creep. I have had craftspeople put hydraulic gauges on a system test points and tell me it has pressure. Try putting your gauges on the work end of your lines and see if the pressure comes up quickly when the valve is actuated, if it does not, check the pressure on the valve end and see the gauge reaction. Pressure gauges are not real reliable when looking at flow issues since they use small volumes of oil to react. You might try disconnecting both ends of your hose and pushing a stiff wire thru them to see if they are clear. Also remove and check your quick couplers for debris.
The confusing issue with your tractor is it effects all operations, it does not seem plausible there would be more than one defective hose or blown cylinder piston seals leaking all of your fluid, so what is common the valve. There could be more than one issue.
Pressure and Flow in a hydraulic system are two different things. You can have pressure with very little flow, and flow with very little pressure. No flow, no loader or slow movement. A relief valve or directional valve leaking bye can give you flow but in the wrong place, so little work is done. Your oil can be recirculated within a system and return to tank with worn or defective components. In all my years I replaced very few directional valves do to wear or damage but many pressure relief components for erosion, broken springs, frozen poppets etc. so this is a real possibility.
If your 3 point is working I would concentrate on loader components. I would make sure all valve functions are traveling full travel and with free movement, then I would remove and disassemble the pressure relief to make sure there are no obvious defects.
Since you mentioned the hydraulics seem to bog down the next thing I would check are your hoses and quick connects especially if your hoses are old. I have seen many times the internal rubber in the hoses break down and literally plug the line, usually in lines ½” or smaller, the same effect as a severely kinked line. This condition also happened in hydraulic lines that were bent beyond there minimum bend radius causing the hose to break down prematurely. In some cases the function would work in one direction and not another, in a few no function at all. The system could create pressure but your cylinders would not move or they would creep. I have had craftspeople put hydraulic gauges on a system test points and tell me it has pressure. Try putting your gauges on the work end of your lines and see if the pressure comes up quickly when the valve is actuated, if it does not, check the pressure on the valve end and see the gauge reaction. Pressure gauges are not real reliable when looking at flow issues since they use small volumes of oil to react. You might try disconnecting both ends of your hose and pushing a stiff wire thru them to see if they are clear. Also remove and check your quick couplers for debris.
The confusing issue with your tractor is it effects all operations, it does not seem plausible there would be more than one defective hose or blown cylinder piston seals leaking all of your fluid, so what is common the valve. There could be more than one issue.
It appears that you have pressure, but don't have relief or return to tank flow.
As previously mentioned, possible crap in line or valve or QC or kinked line.
Depending on how your FEL is plumbed into the circuit, check your 3pt isn't riding up at max stroke and relieving.
As previously mentioned, possible crap in line or valve or QC or kinked line.
Depending on how your FEL is plumbed into the circuit, check your 3pt isn't riding up at max stroke and relieving.
Thanks for all the replies and suggestions. I'll try replacing the QC's on the FEL and see if that's it. I did find a traveling tractor repair guy who can get out here next Monday if I can't figure it out.