JD Z235 (zero turn) - steering fades when hot and pump makes a cavitation sound

TFH

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  • / JD Z235 (zero turn) - steering fades when hot and pump makes a cavitation sound
JD ZMower is fine for 30 minutes or so then the steering on the left side starts to fade and the hydraulic pump sounds like it cavitates when you try and turn left. I can't seem to find a similar issue on this forum. The mower has 170 hours so I'm hoping its not a major issue. Any advice appreciated.
 

ILENGINE

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  • / JD Z235 (zero turn) - steering fades when hot and pump makes a cavitation sound
Could be something simple like contaminated oil causing foaming, but I have a good feeling that the pump is jacked.
 
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