I have an articulated machine that uses 10w40 for "hydraulic fluid". The machine uses a variable displacement pump to drive four wheel motors and various hydraulic cylinders. The manufacturer specifies 10w40 for the 10 gallon hydraulic system. I was talking to an engineer at the company that manufactures the variable displacement pump and he strongly recommended the use of hydraulic fluid, instead of motor oil, due to the additives package.
So, here's my question. Will it "hurt" to mix the motor oil with hydraulic fluid? I was thinking of draining the hydraulic tank and adding back 10 gallons of Mobile DTE 26 (ISO 68). However, I'd still have at least a gallon or two of motor oil in the motors, lines and cylinders. Any idea if motor oil will mix with proper hydraulic fluid without causing any problems?
So, here's my question. Will it "hurt" to mix the motor oil with hydraulic fluid? I was thinking of draining the hydraulic tank and adding back 10 gallons of Mobile DTE 26 (ISO 68). However, I'd still have at least a gallon or two of motor oil in the motors, lines and cylinders. Any idea if motor oil will mix with proper hydraulic fluid without causing any problems?