Rear 3PH is not working - running into a wall

[arcteryx]

Short- Recently got a 2010 3032E, but I know this is very similar if not the same hydraulics as the 3038E. The FEL and power steering work as it should. Rear 3PH does not move. I don’t know if they worked before or not. I do have the tech service manual

Long- I rebuilt the lift cylinders as they were leaking. I also replaced several hydraulic hoses due to age. And I drained/filled the hydraulic fluid and replaced all filters, including the 2 hydraulic filters on the left side under the seat/food area. So the system was open for air to enter. Still not working, so I removed the hydraulic manifold/control valve. I ended up disassembling the control valve and put new o rings in it.

For the manifold, I blew some air through it but it did not see like I was getting the proper output on all ports. Unless there is a procedure for bleeding, I will remove the manifold again.

Questions-
1- I am wondering if air is trapped in the rear. Is there a way to bleed the hydraulic system?
2- Is there a diagram of the manifold flow or how to tear it down? I cannot find one on the parts diagram or in the service manual, at least that I can find.
3- I suppose it could be the o rings on the piston, but I would expect it to move a bit even at higher RPMs

 

[beenthere]

Should not have to bleed the system.

Look elsewhere for the problem.

 

[oldnslo]

Is the FEL valve factory installed or an add on after market?

How many lines connect to the FEL valve including the four for the loader functions?

As a temporary test with no load on the three point. Lower the 3 point fully then move lever to raise while simultaneously raising the loader. Does 3 point raise then? If yes then suspect tank and power beyond hoses on the FEL are swapped but you need to trace the lines to confirm this.

Like been there states no reason to bleed a pressure line in this circuit it will self bleed the air.

 

[alexpops]

Do you have an adjustment knob that controls the speed of up/down? Sometimes if those are set wrong, they won't let the 3pt move.

 

[arcteryx]

Is the FEL valve factory installed or an add on after market?

How many lines connect to the FEL valve including the four for the loader functions?

As a temporary test with no load on the three point. Lower the 3 point fully then move lever to raise while simultaneously raising the loader. Does 3 point raise then? If yes then suspect tank and power beyond hoses on the FEL are swapped but you need to trace the lines to confirm this.

Like been there states no reason to bleed a pressure line in this circuit it will self bleed the air.

It is OEM and came with the tractor from the factory.

I tried the temporary test and there was no change.

Do you have an adjustment knob that controls the speed of up/down? Sometimes if those are set wrong, they won't let the 3pt move.

Yes, it controls the down. I have tried multiple ways and still nothing.

 

[oldnslo]

Arcteryx
How many lines are connected to the FEL valve? I presume seven. Since 3 point does not work it becomes more challenging to diagnose without a flowmeter since you need to determine where the flow is going. A possible option to check FEL valve power beyond circuit would be to install a flow control and gauge in the power beyond line. Slowly close the flow control with FEL controls all in neutral position. If pressure begins to rise and continues to relief pressure then problem is most likely in the three point valve. If pressure does not build
then problem is in FEL valve power beyond circuit.

NOTE: be a 110% certain you working with power beyond line and not tank line if doing above test.

 

[zzvyb6]

#pt lift has it's own pressure relief valve. Could be stuck open or the o-ring is torn and leaking.

 

[arcteryx]

Thanks for the replies. I will look tomorrow and count the lines and report back.

I did remove the manifold again as well as the control valve. I did not tear down the control valve but did do it to the manifold. I remove all of the valves to ensure they were not stuck. Reinstalled everything and still no working 3PH. I am at a loss.

 

[arcteryx]

I have 7 connections, 6 on the bottom and 1 on the side.

 

[oldnslo]

Are any of the connections marked on the valve? Seems like there is no standard in how that power beyond port is labeled though. In most cases it is on the opposite end from pressure but again not always. This should go back and supply oil to the 3 point valve and rear remote valves if you have them.

Some valves have a “special” fitting sometimes called a sleeve that goes into valve to create power beyond others just have an internal plug. If the fitting or sleeve style it will usually have a taller hex than a standard fitting.