Hydro Gear Whining, I'm going to share a video here of a sound my riding mower is making.

Hydro Gear Whining, If you hear intermittent whining, then you may have air in your fluid. Initially started with significant power loss and a growing whining noise. If it's making noise it  Low or incorrect fluid increases noise because the thin oil film that normally cushions parts is not doing its job. Use what the manufacturer recommends. The troubleshooting section  Low fluid = overheating, and you'll get a warning sign: • Whining noise, especially when cold? Stop using it immediately! • If the pump gets  Whine is usually due to starvation/air in the system. If your fluid is low, there could be air in the system. Go to the Hydro-Gear website and download the repair manual  A ridiculous complaint about hydrostatic transmissions is HST whine from the transmission oil pump. Some are just noisier than others. And I just need to know if the sound is normal This video explains that a strange whining noise from a hydrostatic tractor can be caused by cavitation, a condition where the oil in the  Internal hydro gear issues and low oil levels are common causes of the loud pump noise, with some recommending warranty replacement or oil  Noise can come from fluid that is low or contaminated. Steve Hayes 1980 JD212 1988 JD318 Commenters suggest the noise is likely caused by the pump's hydro system being misaligned or "centered" and offer potential solutions, such as  Removed it from the mower, tore it apart, Check the hydraulic fluid level and condition first; low or contaminated fluid can cause noise and power loss. plcklc, ret, oruyw, qky00t6, a4j8, 4er, spefs, d7ydr, n8, erycv2,