* Reduce the viscosity of the hydraulic fluid, leading to insufficient lubrication and increased wear on components.
* Compromise the hydraulic fluid's ability to prevent corrosion and oxidation.
* Interfere with the hydraulic system's seals and gaskets, potentially causing leaks.
* Contaminate the hydraulic system, requiring a complete flush and fluid replacement.
Mixing the two fluids can cause significant and costly damage to the entire hydraulic system, leading to breakdowns and potential safety hazards. Always use the correct type of hydraulic oil specified for your system.