TXFlyGuy
Well-Known Member
After learning of two incidents of prop governor failure due to contamination from the PSRU, what is the best gear lube?
On AutoPSRU.com, they strongly recommend 85-140 mineral oil (GL-5) saying this is the only proven oil to run quiet, smooth and cool, without foaming issues.
All of the Autoflight New Zealand PSRU's (Titan Mustangs) run Valvoline 75-90 Syn Oil. And the manufacturer says this is suitable.
I noticed some foaming in my oil lines, and my gearbox has a noticeable high pitched "whine". Enough that it got my attention. And I have the 75-90 Syn Oil in my gearbox.
On AutoPSRU.com, they strongly recommend 85-140 mineral oil (GL-5) saying this is the only proven oil to run quiet, smooth and cool, without foaming issues.
All of the Autoflight New Zealand PSRU's (Titan Mustangs) run Valvoline 75-90 Syn Oil. And the manufacturer says this is suitable.
I noticed some foaming in my oil lines, and my gearbox has a noticeable high pitched "whine". Enough that it got my attention. And I have the 75-90 Syn Oil in my gearbox.