3 point raise and lower

GMtb42 · Oct 13, 2007

Don't remember if the tractor (L2800 with updated valve) did this before now but when I let the box blade down to the ground at say 4 on the lever scale I have to move the lever to 6 or more on the scale before the blade starts to lift , shouldn't the 3 point raise at or about the same point the 3 point is at when lowered ?
Is there something that can be adjusted to make it closer to the same point ?

ccsial · Oct 13, 2007

I just went out and checked my L3400. It goes up and down from the same number. There is no dead area in it.

If your implement had bottomed out there will be a dead area until the position lever is raised above the bottomed level. Be sure that is not happening.

If it is not bottomed, check for play in the actuator lever and feedback rod. If all that is tight it may be a hydraulic issue but I have no idea what to do about that. I suspect some hydraulic experts will have an idea here.

I looked in my service manual trouble shooting area and they don’t list this problem.

GMtb42 · Oct 13, 2007

ccsial said:
I just went out and checked my L3400. It goes up and down from the same number. There is no dead area in it.

If your implement had bottomed out there will be a dead area until the position lever is raised above the bottomed level. Be sure that is not happening.

If it is not bottomed, check for play in the actuator lever and feedback rod. If all that is tight it may be a hydraulic issue but I have no idea what to do about that. I suspect some hydraulic experts will have an idea here. All are tight .

I looked in my service manual trouble shooting area and they donç¨š list this problem.

No it is not bottomed out , that is just it , let the box blade down till it just rest on the ground and stop the lever at that point , then begin to raise the lever to raise the blade , have to move pretty far to get it to start raising again and same for the down also I just noticed .
Quite a large dead spot both ways .

ccsial · Oct 14, 2007

That doesn't sound real good. I'd have to call the dealer on that one. I hope you have a good dealer.

JerryG · Oct 14, 2007

This is normally for tractors. The reason is because the lift is set up to operate some equipment (such as plows) which have an operating level below the soil surface. If the number 1 was at ground level, there would have to be negative numbers for where a working plow would operate. Instead of doing that, they start the numbers at the lowest level that the lift will operate.

GMtb42 · Oct 14, 2007

JerryG said:
This is normally for tractors. The reason is because the lift is set up to operate some equipment (such as plows) which have an operating level below the soil surface. If the number 1 was at ground level, there would have to be negative numbers for where a working plow would operate. Instead of doing that, they start the numbers at the lowest level that the lift will operate.

Maybe I am not describing it correctly , the lift control has a scale from 1 to 8 , 1 being the lowest position and 8 the highest position of the 3 point lift , when a implement is attached if you lower it to the ground and make contact with the ground the lever is at 4 not the lowest position but about mid ways on the position scale , now to get the implement to move you have to move the control lever past 6 on the scale before it moves upwards from the ground .
Same goes if the lift is at its highest position 8 the lever has to be moved to 6 to make the 3 point lift go downwards .

JerryG · Oct 14, 2007

You stop at 4 going down but it doesn't start until 6 when you start back up?

GMtb42 · Oct 14, 2007

JerryG said:
You stop at 4 going down but it doesn't start until 6 when you start back up?

Correct , seems strange to me , shouldn't it lift from the stopped position as soon as you move the control lever ?
I know what you were saying if you let the implement all the way down and went to 1 on the scale there would be a dead spot until the control lever reached a point that started to raise the implement .
ccsial , said he tried it on his L3400 and his moves from the point the lift stopped at , hmmm .

wushaw · Oct 14, 2007

You have play in the linkage to the valve or the valve does.

Texas Dodge · Oct 14, 2007

My L3400 moves right away up or down.

clenhart · Oct 14, 2007

I have an L2800 with the updated valve and mine has no slack. As soon as the lift lever is moved in either direction, the 3pt. moves accordingly.

GMtb42 · Oct 14, 2007

There is no slack that I can see , the lever has a shaft that goes to the valve , no linkage , so has to be in the valve somewhere inside the tractor .
So is there any kind of adjustment that can be performed to the valve ?

ccsial · Oct 14, 2007

GMtb42 said:
There is no slack that I can see , the lever has a shaft that goes to the valve , no linkage , so has to be in the valve somewhere inside the tractor .
So is there any kind of adjustment that can be performed to the valve ?

There is one linkage involved and maybe you already checked it. The feed back link (rod) is on the left side where the 3PH arms come out. It feeds the 3PH position back to the valve. If that is OK it must be in the valve itself.

The service manual I have does not mention any adjustments in the valve.

GMtb42 · Oct 15, 2007

ccsial said:
There is one linkage involved and maybe you already checked it. The feed back link (rod) is on the left side where the 3PH arms come out. It feeds the 3PH position back to the valve. If that is OK it must be in the valve itself.

The service manual I have does not mention any adjustments in the valve.

That one is tight as well , I thought it was for stopping the 3 point on lift height ?
So must be in the valve , great

.

ccsial · Oct 15, 2007

GMtb42 said:
That one is tight as well , I thought it was for stopping the 3 point on lift height ?
So must be in the valve , great .

I don't know what would cause the valve to have hysteresis like that. Is it still under warranty? SInce they put the new valve in they should cover it.

mjfox6 · Oct 15, 2007

Do you have the valve under the seat open all of the way, so that the implement drops immediately to the ground? If not, it may be slowly dropping while you continue to move the lever down and you don't need to. You might just have to put it on 6 and wait.

GMtb42 · Oct 15, 2007

mjfox6 said:
Do you have the valve under the seat open all of the way, (No medium speed , not slow not fast) so that the implement drops immediately to the ground? If not, it may be slowly dropping while you continue to move the lever down and you don't need to. You might just have to put it on 6 and wait.

Just going to have to call Service at the repairing Dealer and see what they say .

ccsial · Oct 15, 2007

GMtb42 said:
Just going to have to call Service at the repairing Dealer and see what they say .

Please keep us informed as to the problem, Thanks.

Texas Dodge · Oct 16, 2007

mjfox6 said:
Do you have the valve under the seat open all of the way, so that the implement drops immediately to the ground? If not, it may be slowly dropping while you continue to move the lever down and you don't need to. You might just have to put it on 6 and wait.

When I first operated my 3PH, that knob was set to lock and it wouldn't move.

GMtb42 · Oct 16, 2007

Ok will do !
Texas Dodge does yours raise from where you stop at ? , like if you stop at 4 on the scale does it move up immediately when you move it , or is there a dead spot before the lift raises again ?