I have a can of Phillips 66 X/C Aviation Hydraulic Fluid that Id like to use in my Parker 108 series hydraulic pack. MIL-PRF-5606F states that viscosity should be ~15cSt at 38C. The Parker/Olidyne spec is ~35-65cSt. So the Phillips
fluid is less viscous and is labeled not for use with natural rubber components.
Does anyone know if this fluid is suitable?
Can someone recommend an inexpensive, automotive fluid that has proven effective?
424DH
Joe,
While 5606 hydraulic oil is a bit pricey, you only need a little, and it’s not like engine oil that you need to change
periodically…although they do recommend flushing/replacing every ten years… Why take a chance with the seals, etc. It will cost you a LOT more time and aggravation to repair/correct the damage caused by non-compatible fluids than just using the specified 5606.
My two cents…
Bob