784 hyd problems

Good afternoon, I'm currently having some hydraulic issues with my 784, when I first start it the hydraulics work theyre a bit slower then I remember them but they work, but as I use the machine say for a coulple hours cultivating or something like that my hyds fade to be almost non existent or very very slow and no power. the circuits that are affected are the steering , remotes, 3 point and my pto also. Any insight to what could be causing this? I do have an IH service manual here also but theyre not the most helpful with where to start looking. I do have a flow meter and gauges also but was looking for some assistance for which direction to start from. Thank you in advance!
Chris
 
Start with the filter than oil level then go from there. The filter is on the MCV on the left side I believe. Under the step. Get back to us after those are done. Could be lots of things. Pump, blown gasket, o-ring Valve.
 
Had a 684 that acted the same way. I noticed when it started to act up,I put the tractor on an incline and brakes & steering working fine. Material from the emergency brake blocking pickup for hydraulics. Took off rock shaft and cleaned out. Been fine ever since.
 

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