What can cause clutch fluid to become contaminated?

Clutch fluid contamination can occur through various means, and all of the listed factors contribute to this issue. Exposure to dirt and moisture is significant because even minor ingress of these contaminants can degrade the fluid's properties, leading to corrosion and reduced performance in the hydraulic system. Moisture not only affects the fluid’s boiling point but can also lead to rust formation in the components.

Using non-specified fluid is another critical factor, as different fluids have distinct chemical compositions. Using an incompatible fluid can lead to the breakdown of rubber components in the system, causing leaks and further contamination of the fluid.

Failed master cylinder seals can introduce additional contamination into the fluid, as worn or damaged seals may allow dirt, moisture, and debris to enter the hydraulic system.

Thus, since all these factors can independently or collectively contribute to the contamination of clutch fluid, they highlight the importance of proper maintenance and fluid selection in hydraulic clutch systems.