Case2290 hydraulic issues

[Stritecase]

Recently bought a 2290 that is now giving us hydraulic issues, it randomly will loose hydraulic outlet function & 3pt function. Has never had an issue with steering, brakes or PS . With a flowmeter hooked up it right now it doesn’t have much flow then goes to 0 when pressure is applied. I had found a broken spring on the bottom of the pto valve spool, replaced that & everything worked, went to the field for 20 minutes & lost functions again. I plan to get a manual from a buddy soon but just thought maybe someone could quickly point me in the right direction!

 

[mEl]

I would do a flow test on the power shift just to eliminate it as the problem, it works at about 200 PSI so should show good volume at that pressure, shift between the different powershift ranges and watch for flow differences in each range, leaky powershift clutches will affect the main hydraulics as the flow divider is designed to satisfy the power shift transmission first. Since it is an intermittent problem , without testing, I would lean toward a compensator problem, but testing is vital. Clutch flow can be done right through the remotes..

 

[Stritecase]

I would do a flow test on the power shift just to eliminate it as the problem, it works at about 200 PSI so should show good volume at that pressure, shift between the different powershift ranges and watch for flow differences in each range, leaky powershift clutches will affect the main hydraulics as the flow divider is designed to satisfy the power shift transmission first. Since it is an intermittent problem , without testing, I would lean toward a compensator problem, but testing is vital. Clutch flow can be done right through the remotes..

Ok I can do that again, actually did that the first time I was dealing with the issue & found the broken spring, during that test I didn’t see any differences between the gears. What would be involved with the compensator? Is that something you can rebuild or they get replaced?

 

[mEl]

Generally they get replaced but please try to isolate it as the problem, The compensator takes pressure /flow information from the hitch and remotes. and controls the swash plate angle to produce only the flow and pressure needed and is the brain of the hydraulic system. It only has springs and plungers in it so you could inspect it for a bad spring or a sticky plunger. it is bolted to the hydraulic pump near the 8 GPM steering/brake pump and has small lines going to it.

 

[Stritecase]

So with a flowmeter hooked into an outlet & dumping into the hydraulic oil filler hole it was running like 10gpm @1500, I didn’t observe any difference between powershift gears other then during the shift. The thing is the gauge was just really jumpy at times, like fluctuating the needle from 4-10gpm then it would settle down. Then after testing thru all the gears multiple times I lost all flow which seems to be what it does in the field, works for awhile then it don’t. Stopped tractor, then restarted & it had 2gpm , then after a minute it lost all flow again.

 

[mEl]

An erratic reading on gauges could be caused by a suction screen plugging issue, is the system noisy hydraulically, does it chatter in the piping? When testing the powershift, I like to set the remote pressure at 1500psi with the flow meter, then test the remotes flow in each range.1500 Lbs should keep the detents on the remotes locked in so you have your constant pressure. I did not see where you said you changed the suction filters, a removable cover on the RH side of the tractor. I am not one of those guys that thinks changing filters solves every problem, but since you are new to the tractor, you may want to make sure they are clean. If you buy filters I recommend the fiberglass elements not paper pleat, I have seen firsthand what moisture does to paper pleats and fiberglass does not have that issue. here in the Northeast, we have temperature swings and moisture levels that let the trannys sweat and paper filters can absorb moisture and restrict oil flow. Just throwing a couple things at you that I personally have dealt with over the years, good luck and I'm sure you will have more input from others who have dealt with these issues.

 

[Stritecase]

An erratic reading on gauges could be caused by a suction screen plugging issue, is the system noisy hydraulically, does it chatter in the piping? When testing the powershift, I like to set the remote pressure at 1500psi with the flow meter, then test the remotes flow in each range.1500 Lbs should keep the detents on the remotes locked in so you have your constant pressure. I did not see where you said you changed the suction filters, a removable cover on the RH side of the tractor. I am not one of those guys that thinks changing filters solves every problem, but since you are new to the tractor, you may want to make sure they are clean. If you buy filters I recommend the fiberglass elements not paper pleat, I have seen firsthand what moisture does to paper pleats and fiberglass does not have that issue. here in the Northeast, we have temperature swings and moisture levels that let the trannys sweat and paper filters can absorb moisture and restrict oil flow. Just throwing a couple things at you that I personally have dealt with over the years, good luck and I'm sure you will have more input from others who have dealt with these issues.

Before we bought the tractor it had been fully serviced including hydraulic filters, at the start of these issues I pulled them out to look at them & also I pulled the suction screen out & cleaned it up, that helped with the hydraulic noises you refer to, I feel like it’s not really noisy now, just normal. When I was testing I did have the pressure right around 1500psi the one time I ran thru the power shifts, should have mentioned that in my prior post. The tractor sat for a year after being serviced till we bought it, oil looks good in fact I’d say it was new at the servicing. I could get new filters & try , but do you think that would cause flow to go right to 0 at times? When the flow goes to 0 the hydraulic noise it does still have just stops, then it’ll intermittently go back to 1-2k flow

 

[Stritecase]

Update: I got new filters installed & I do believe it helped the situation. The jumpy gauge has pretty much stopped, but There are two anomalies I now see, with the oil warmed up & running at 1800rpm , holding the pressure at 1500psi, it will be flowing about 10gpm, then when you raise the 3pt the flow & pressure drop to barely any flow, maybe 1gpm & pressure drops to 400, when hitch reaches the top the flow & pressure return to 10gpm 1500psi. The other thing is the flow goes to nothing when you back the pressure off to 0?? In general shouldn’t the flow be more than 10-12 gpm?

 

[mEl]

That is a pressure /flow compensated system and does not act like an open center system, the pump is designed to make only as much pressure and flow as needed to do any particular job so you will not see full system flow unless something is calling for it. Did you open the flow valves on the remote valves, the flow to the remotes is variable by those knobs by the spool. Also, those valves have a sensing circuit built into each remote section and the hitch. the sensor check ball retainers have O rings that can blow causing everything to go dead, usually when that happens the sections downstream of the valve with blown O rings will not work. It is an entirely different concept than open center.

 

[Stritecase]

That is a pressure /flow compensated system and does not act like an open center system, the pump is designed to make only as much pressure and flow as needed to do any particular job so you will not see full system flow unless something is calling for it. Did you open the flow valves on the remote valves, the flow to the remotes is variable by those knobs by the spool. Also, those valves have a sensing circuit built into each remote section and the hitch. the sensor check ball retainers have O rings that can blow causing everything to go dead, usually when that happens the sections downstream of the valve with blown O rings will not work. It is an entirely different concept than open center.

Yes , the flow valves are wide open.

 

[mEl]

If you have not, remove the sender from the PFC charge pump line near the pump, install a 0-600 gage in there, you should between 200-260 Lbs charge pressure. If so the charge circuit should be doing its job. IRRC, the sender is in a vertical large pipe that goes directly to the pump.

 

[Stritecase]

I’m only getting 50psi at Full throttle

 

[mEl]

You have something not right in the charge pump circuit, you cleaned the suction screen, there is a charge pump relief on the manifold I believe but I have never had an issue with them, the charge pump is located in the casting behind the main pump. I suppose a major failure of the main pump could allow a lot of leakage internally so the pressure could not build. If the charge pump is good you are looking at major leakage somewhere. The service manual describes flowmeter hookups that may be helpful if you can find one.

 

[Eagle Doc]

You have something not right in the charge pump circuit, you cleaned the suction screen, there is a charge pump relief on the manifold I believe but I have never had an issue with them, the charge pump is located in the casting behind the main pump. I suppose a major failure of the main pump could allow a lot of leakage internally so the pressure could not build. If the charge pump is good you are looking at major leakage somewhere. The service manual describes flowmeter hookups that may be helpful if you can find one.

I don't have a genuine Case service manual just an I&T for 2290. It says the charge pressure should be 15 to 30 psi. My manual is old and maybe had mistakes that were corrected in later issues.

 

[Stritecase]

I did manage to get a case manual from a buddy so sometime when I get time I can dig deeper. after the filter change it actually performs pretty good , the filter light doesn’t come on anymore but sometimes the trans oil light comes on?? , I used it to Ted some hay & pull a bale cart so nothing requiring 3pt hitch or much hydraulic outlet use, so not sure how it’ll do there yet but it did lift the Tedder wings quickly.

 

[mEl]

Eagle Doc, you may well be right on the charge pressure as I got my info from another source, sounds like he's making progress.