[Michael]

IN my opinion it is not the hydros as it is running fine before and it seems that it almost sounds like a coil is going bad. I am not sure but I have seen it where the coil gets hot and after a while it bogs down and then dies. Allowed to cool off and it runs fine. I replaced the coil on my L-120 (I have since traded it in for a X320) and it ran like a mad ape after that.

 

[Michael]

I know that it is expensive but you might want to get the service manual from John Deere for this. Here is a link for getting a CD manual, it cost $45.00 for your model, The manual number is TM2077CD.

https://techpubs.deere.com/products/ProductResults.aspx

This way you can do a good troubleshooting without shooting in the dark.