When operating a vehicle with a trailer and frequently traveling on mountain roads, the brake fluid must be replaced every 15,000 km.

We pump out the old liquid from the tank using a syringe or a rubber bulb.

We pour new liquid into the tank.
We bleed the hydraulic drive of the brake system (see Bleeding the hydraulic brake system) and hydraulic clutch drive (see Bleeding the clutch hydraulic drive), until the new liquid (lighter than the old one) will not start to come out of the bleeding nipples of all working cylinders.
After bleeding the brakes and clutch, bring the fluid level in the reservoir to normal (see Checking the fluid level in the brake and clutch hydraulic reservoir).
Use brake fluid recommended by the manufacturer.
Otherwise, the hydraulic drives of the brakes and clutch may fail.
(The original article can be found on the resource: «CHEVYMAN.RU»)
