3-Point Hitch trouble

[bigearl42]

3 pt will not raise on a 2420 Farm Pro. changed the hydraulic pump becaure the seal went out now no 3 pt Help please.
Doug

 

[erj]

I think that we need more information. Did you figure out what made the seal go out on the pump? What were you doing when it went out?

 

[bigearl42]

Have no idea why the seals blew in the pump. the pump was replaced along with the bearings the sat for about 4-5 months with the lines disconeccted. one source told me to bleed the air out of the lines. this tractor has a koyker loader and the bucket is very slow to curl back. it raises and lowers fine and dumps. That is all i know
Doug

 

[Rich Waugh]

Pumps usually blow seals because they deadhead - running the engine with the loader lines uncoupled will do that in a few seconds. Often blows the pump casing apart, too.

These hydraulic systems are open systems and are self-bleeding. It may take several minutes of operating everything to get all the air cycled out of the system. If the thing sat around for a long time, there may be sludge in the hydraulic sump that has partially blocked the pi9ckup tube/filter. Have you drained, flushed and re-filled the hydraulic system?

Below the seat is a knob. That is the flow control valve for the TPH and rear half-remote. If it is screwed in all the way, or somehow blocked, the flow to the TPH will be diverted to the half remote and the TPH will not function. It has a set screw! Loosen that first before you try to open it. May take a bunch of penetrating oil and patience to get it to move - be patient and careful or you'll break it. Once it is moveable, open it up car3efully and clean it out, then re-assemble. Close completely, then open it - about 1 to 1-1/2 turns should be about right, I think. Generally it is adjusted with the implement on the TPH to set the speed at which the implement drops. This obviously changes with the weight of the particular implement. The raise speed should remain fairly constant unless, of course it is closed completely or blocked.

Hope this helps, as I have hit the limit of my knowledge - maybe even exceeded it! :laughing:

Rich

 

[RonMar]

I would think a dry pump will have a hard time pulling fluid up and over the top to draw fluid from the sump. I would fill that suction line to help get the pump to prime.

But if the loader is working, the pump is primed, and cycling the controls will eventually purge all teh air.

the 3PH should also be working unless it's valve is an issue, or as Rich mentioned, the speed reg valve is closed down all the way...

 

[bigearl42]

thanks for the info but i am not real sure about this plug i cant seem to locate it, is it directly under the seat or on the front of the seat platform?

 

[g0rd0]

the valve that he is referring to is on the deck directly attached to the bottom front center of the fluid resivour (that is what your seat is attached to) it has a good sized knob on top, the knob (black) is center of the photo. I believe that this is what controls the flow to your lift, this is from my jinma 284 and should if not be correct it should send you in the right direction.

 

[bigearl42]

thanks Guys
the TPH is fixed and working just right, any ideas about the FEL being slow to curl up?

 

[greg_g]

Dirt in the curl side of the loader controller?

//greg//

 

[RonMar]

thanks Guys
the TPH is fixed and working just right, any ideas about the FEL being slow to curl up?

Do the lift and bucket curl use the same size hoses and fittings? No extra adapters visible in the lines? Any kinks folds or visibly crushed/damaged lines? Are you the first/only owner of this machine? If not, the previous owner may have thought the bucket curled too fast and did something to slow it down. If the same size hoses are used, you can pull the fittings and check for restriction washers(restricted orifice) in the curl circuit used to restrict/slow it's operation... If you do not find anything, you could have a line with a collapsed liner that is restricting the flow, with no outward signes of doing so. This can be hard to pin down, you can disconnect the lines one at a time and time the flow into a bucket, looking for the one with the slow flow.

Good luck.

 

[Rich Waugh]

I would guess either dirt in the curl valve, as Greg suggested, or possibly the stick is not fully actuating the valve due to misalignment.

What was the cure for the TPH? Inquiring minds want to know! :thumbsup:

 

[bigearl42]

I would guess either dirt in the curl valve, as Greg suggested, or possibly the stick is not fully actuating the valve due to misalignment.

What was the cure for the TPH? Inquiring minds want to know! :thumbsup:

The cure was the valve in front of the seat. loosened the set screw, unscrewed the plug let it sit a few minutes open and replace everything and she went to working. I got this little tractor from a friend and have used it in the past. he did not do anything to adjust the flow it just sat for about 4 months withe th hydraulic pump off till i found a parts supplier close by he put it back together and now the only problem is i am going to have to pay him for it and the curl up. if you pull the joy stick to the right and then start toward the floor it will curl, but it you just pull it to right nothing. thanks for the help

 

[Bob Rooks]

Pull the boot off of the joystick and check the spool linkages. Sounds like the spool on the curl isn't being moved enough. They can go out of whack occasionally.

 

[J_J]

I agree with Bob, check the linkage. Look at the end of the spool as you try to shift, and note whether the spool is moving when you move the lever. If the spool is only moving a little, it is still in the feather zone.

Try removing the linkage and move the spool manually, in both directions. Check for full range.

You might also check the nut under the cap on the bottom of the spool that sets the spring center.

 

[J_J]

bigearl42,

Did you figure out the problem with the curl function?

 

[four m]

i got the same tractor with the same problem . what did to fix the tph just turn the knob when you found it to get it to raise the tph?