340 Utility Hydraulics not working

I have a 340 utility,serial 9015 S-Y. When I first got it running (it sat for 8 years) the drawbar lifted fine. A week later, nothing. The two remotes were dead too.
I am pretty sure I was taking off the pump cover. There were 6 bolt, I took out 4 and saw fluid running pretty well so I put them back in and decided to ask.
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That is the hydraulic filter and pump is on other side directly across from it. Pull filter and I am pretty sure you will find it full of crud. May require fluid change as well. If screen on filter end is dirty that tells you filter is basically plugged as that screen is a bypass so when oil cannot get through the filter it goes through that screen. Unless, you happen to have the old screen type filter that has no by pass and you can clean the whole screen. May, or may not have two donut filters inside of screen filter depending on vintage and changes made.
 

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