bucket tilt

[imarobot]

too late now but I have a bag of multicoloured tyraps I use for 'complicated' things( ie more than 2 connections...). Each hose gets it's own colour THEN take a few pictures from several angles...THEN disassemble $10 spent on 'rainbow tyraps' can save HOURS of 'how did this come apart'....arrrrrghs.

Did the colored tie wraps too, very helpful. However, I recently noticed that over time the colors are fading and it's hard to tell what color they are
Time for a re-do

 

[gleneben]

Ah, you tested the rebuilt cylinder with the old hoses and it worked OK? So the hoses may be involved. Do they have quick-connect couplings or are they piped in direct? Nevermind, you said you removed them and got a trickle out of the control. I assume you operated the control to the curl and dump positions? Nothing came out even when you operated the valve both ways?

So the problem must be in the control. Obviously you have enough fluid in the tractor and the pump works OK, or the arms wouldn't lift up and down.

Any chance the lever has become physically detached from the spool valve it controls? This can particularly happen with joystick style controls with pivots and levers hidden under a boot.

Did you use teflon tape on the hoses by any chance? I've heard of tape getting into a system and plugging the tiny ports inside a spool valve.

i will check for that , i used the liquid teflon but when i took teh lines off they were installed with tape.

 

[TheOldHokie]

i will check for that , i used the liquid teflon but when i took teh lines off they were installed with tape.

Go to the heart of the matter. Disconnect both hoses AT THE VALVE.

Dan

 

[gleneben]

Remove both hoses from the valve and try again. Be careful - if could get messy!!!

Dan

im going to try that after i check the control valve for debris

 

[TheOldHokie]

im going to try that after i check the control valve for debris

Dobit BEFORE you tear the valve apart!!

 

[gleneben]

Go to the heart of the matter. Disconnect both hoses AT THE VALVE.

Dan

i will try that first

 

[gleneben]

with no lines on the right side of the control block the best i could get was about a 3" high stream. when i took one of the lines off the left side , well that wasn't a good idea i'm not sure how high it went i let go of the lever and tried to get out of the way. left side has REALLY good flow. when i put the hoses back on and put them i a bucket alli get is a burp and drip drip. the left lever when i pulled it back the bucket goes up but if you pull it out all the way it starts going back down?

 

[TheOldHokie]

with no lines on the right side of the control block the best i could get was about a 3" high stream. when i took one of the lines off the left side , well that wasn't a good idea i'm not sure how high it went i let go of the lever and tried to get out of the way. left side has REALLY good flow. when i put the hoses back on and put them i a bucket alli get is a burp and drip drip. the left lever when i pulled it back the bucket goes up but if you pull it out all the way it starts going back down?

I warned you it might be messy

Pretty clear the valve is working but those hoses look suspect. Are you SURE the hoses in the bucket are the ones connected to those ports on the valve?

Dan

 

[gleneben]

I warned you it might be messy

Pretty clear the valve is working but those hoses look suspect. Are you SURE the hoses in the bucket are the ones connected to those ports on the valve?

Dan

yes they both are on the right side but when the fluid came out of the valve i blew air through the hoses and the lines in both directions. i got nothing but air, no debris. i even ran a #6 copper wire (rounded the end on a wire wheel so not to gouge the hose) through it to make sure i it was not broke down inside. it only has enough pressure on the right side to push fluid out of the valve but not through the hose even when one end is in the bucket. if i have an overwhelming amount of pressure on the left side and little to no pressure on the right i have to have some kind of blockage in the valve block. there is no leakage on the rods or at any of the fittings on the valve block when running the levers. the only thing left i can think of is an internal blockage?

 

[TheOldHokie]

yes they both are on the right side but when the fluid came out of the valve i blew air through the hoses and the lines in both directions. i got nothing but air, no debris. i even ran a #6 copper wire (rounded the end on a wire wheel so not to gouge the hose) through it to make sure i it was not broke down inside. it only has enough pressure on the right side to push fluid out of the valve but not through the hose even when one end is in the bucket. if i have an overwhelming amount of pressure on the left side and little to no pressure on the right i have to have some kind of blockage in the valve block. there is no leakage on the rods or at any of the fittings on the valve block when running the levers. the only thing left i can think of is an internal blockage?

I dont buy that pressure analysis but pull the valve apart if you want. I suggest you remove and inspect the load check on the bucket spool before going inside.

Dan

 

[torch]

the only thing left i can think of is an internal blockage?

Glleneben,

Dan is HIGHLY knowledgeable in hydraulic systems and well worth listening to.

The first rule of troubleshooting is to check the simplest and easiest things first, 'cause it doesn't cost much in time or money and that's usually where the problem is anyway. The second rule is to look at whatever you did to cause the failure.

So, it worked before you changed the hoses, hasn't worked since. Good chance it has something to do with that. The easiest thing to do is to physically verify which port on the valve is supposed to do which thing.

Usually the ports are labelled. "T" for tank return, "P" for the supply from the pump. There may be a second "T" port used in conjunction with a Power Beyond adapter. Then the outlets to the various cylinders are often labelled something like "A1", "B2" etc. If it's an aftermarket spool valve set you can often find a manual for it on-line. If it's an OEM Kubota part then there's probably a repair manual with some guidance available.

It can be real easy to get these things mixed up. It might be well worth your while to double check your earlier work with a fresh eye. Better a "Doh!" moment than to spend a lot of money and time tearing apart something that doesn't need it. You can always tear it apart if needed after double-checking the connections.

 

[TheOldHokie]

Glleneben,

Dan is HIGHLY knowledgeable in hydraulic systems and well worth listening to.

The first rule of troubleshooting is to check the simplest and easiest things first, 'cause it doesn't cost much in time or money and that's usually where the problem is anyway. The second rule is to look at whatever you did to cause the failure.

So, it worked before you changed the hoses, hasn't worked since. Good chance it has something to do with that. The easiest thing to do is to physically verify which port on the valve is supposed to do which thing.

Usually the ports are labelled. "T" for tank return, "P" for the supply from the pump. There may be a second "T" port used in conjunction with a Power Beyond adapter. Then the outlets to the various cylinders are often labelled something like "A1", "B2" etc. If it's an aftermarket spool valve set you can often find a manual for it on-line. If it's an OEM Kubota part then there's probably a repair manual with some guidance available.

It can be real easy to get these things mixed up. It might be well worth your while to double check your earlier work with a fresh eye. Better a "Doh!" moment than to spend a lot of money and time tearing apart something that doesn't need it. You can always tear it apart if needed after double-checking the connections.

He has a Kubota Model 1200 loader. Ypu can download the manual from Kubota books and it details all of the hose routing.

At this point I am strugglling to comprehend how a valve can spew a 3* fountain at the work port but cant push anythimg out a dangling 24" long hose.....

Dan

 

[gleneben]

He has a Kubota Model 1200 loader. Ypu can download the manual from Kubota books and it details all of the hose routing.

At this point I am strugglling to comprehend how a valve can spew a 3* fountain at the work port but cant push anythimg out a dangling 24" long hose.....

Dan

i know ! i was a mechanic in the army for 20 years and never experienced anything like this. if you have pressure , you always have pressure. and when you don't have pressure you never have pressure, i doesnt come and go.. i have to put it all back together and set some fence post with auger, i chained the bucket up for now and will get back into it this weekend. thank you all for your insight , and the use of your knowledge, i will keep you posted.