Changes the oil in the zt5400's at 50 hours. Went through the bleeding procedures following hydrogear instructions. I still see some air bubble coming from on of the pump through the reservoir. So I bleed the system again for the third time with wheels off ground bypass open and closed. Still air bubbles..is this something that will work its way out over time..the mower seems to move fine and without any loud whining or anything.
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