We replace the working fluid in the hydraulic drives of the brakes and clutch in accordance with the maintenance schedule - every 30 thousand kilometers or after two years (whichever comes first).
When using a car with a trailer and frequent trips on mountain roads, the brake fluid must be changed every 15,000 km.
We pump out the old liquid from the tank with a syringe or a rubber pear.
Pour new fluid into the reservoir.
Bleeding the hydraulic brake system (see Bleeding hydraulic brake system) and hydraulic clutch (see Clutch bleeding), until the new fluid (lighter than the old) will not begin to come out of the bleeder valves of all working cylinders.
After bleeding the brakes and clutch, bring the fluid level in the tank to normal (see Checking the fluid level in the brake and clutch fluid reservoir).
Use brake fluid recommended by the manufacturer.
Otherwise, failure of the brake and clutch hydraulic drives is possible.