Case 2290 Power Shift Challenge

Horse 'N Hay

New User
So I have a 2290 with a power shift that just started acting up. At low RPM all kinds of problem getting out of reverse and moving forward but at higher RPM (above 1600) the powershift works fine in all positions. I"m losing pressure somewhere for sure.

At low RPM the reverse powershift surges/stops/surges, first powershift is still stuck in reverse but you can get it to second powershit but second powershift does not move the tractor forward, the third powershift works can drive forward.

Above 1700 RPM all powersift positions work!!

I read an old thread from 2004 and someone wrote to
"take the control valve off of the tractor and dismantle it and wash it out thoroughly. Take fine emery cloth and polish the shuttle valves. Change fluid and filters." but there was no follow up to see if this worked.

I talked with my mechanic in Correctionville, IA who thinks I should clean the hyraulic screen first. I can"t figure out how to access the screen but will keep trying. One post said you have to split the tractor to remove the screen.

Talked with a case guy in Storm Lake IA who thinks it is a leak in C1.

Anybody every see this problem and know what the fix is? My mechanic can"t help until harvest season is over, but I still have some hay work to do before weather closes me out.
 
If I were in your shoes I would not run that tractor till you have the problems resolved, The control valve should be cleaned and checked for sticky pilot spools as they are responsible for a lot of power shift issues. The bigger problem is that if a spool sticks in the engaged position that clutch will be activated all the time as the clutches are fed right from the pump, the power shift spool simply directs oil to open the circuit controlled by the pilot spool. simply , if the spools are sticking the affected clutch WILL be destroyed, this is not a "I'll run it till I have time to fix it" situation. Some parts for the power shifts unavailable new anymore so it is imperative that you fix it before major damage is done. At Idle speeds stuck spools show up as engine lugging down or stalling in certain power shift positions but getting the rpm up you will get enough power to overcome the clutch dragging and you can move but are destroying things. Pressure gauge diagnostics is vital to showing if you have pilot spool spools sticking. Ordinarily I would recommend a flow test but if multiple clutches are engaged damage can be done in the diagnostic procedure so I would want to know which test ports in the power shift valve cover have pressure in each power shift position. I do not know your level of hydraulic expertise but as is proved on this forum at times not everyone has a clue of these power shift s or the valving, Some of us had oil clear to our arm pits from working many years inside these units and have seen the damage that results from bad information. Power shift problems can also be diagnosed by those who know how to do that but here again the unit must be run and I would not advise that until I had the pilot spools checked for sticking. BTW, NEVER polish the pilot spools with any abrasive cloth or sand paper. The spool is not the problem, the problem is generally debris stuck in the bore. If the pilot spools are free and correct clutches are applied in each range only then is it advisable to go with further testing, Hopefully you have not run it enough to do major damage which WILL happen in minutes if run with sticky pilot spools. BTW, sticky pilot spools are generally caused by dirty oil getting to the power shift valve.
 

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