Note: On models with the Easytronic robotic gearbox, the clutch drive is equipped with a separate reservoir for brake fluid (see Chapter 6, Section 4).
4.23. The brake fluid level in the reservoir (3) must be between the MAX and MIN marks (using the Corsa-C model as an example) - protective cover removed: 1. Upper seal of engine compartment bulkhead; 2. Protective cover
24. The liquid level inside the tank is clearly visible through the translucent walls of the latter and should be maintained between the MIN and MAX marks, slightly short of the top.
25. If it is necessary to adjust the fluid level, carefully wipe the reservoir cap and the area around it with a clean cloth to prevent dirt from getting into the hydraulic system.
26. When pouring fluid into the reservoir, make sure that it does not splash onto the surrounding painted surfaces of body parts. Add only fresh fluid of the grade specified by regulatory requirements (withm. Specifications at the beginning of this Chapter), - mixing two liquids of different types is under no circumstances allowed and may lead to failure of the corresponding system!
Warning: Brake fluid is extremely chemically aggressive - do not allow it to come into contact with your eyes or paint on body panels! Do not add hydraulic fluid to the system that has been standing for more than one year or that has been stored in a loosely closed container. Remember that brake fluid is very hygroscopic, i.e. it has the ability to absorb moisture from the air, which can dangerously reduce the efficiency of the brake system!
27. During the level adjustment stage, the condition of the fluid and the inner walls of the tank should also be carefully checked. If any mud deposits, solid foreign particles or water droplets are detected, the system should be emptied and filled with fresh hydraulic fluid (see Chapters 6 and 9).
28. Once the tank is filled to the required level, place the lid on it tightly.
29. Remember that the brake fluid level in the reservoir gradually decreases as the friction linings of the brake shoes wear down, but this decrease is always very slight.
30. If the fluid has to be topped up too often, then there is a leak in the system, the source of which must be identified without delay and the cause eliminated. Carefully inspect all brake lines and their nipple connections (see Section 9), and on models with manual transmission, also the entire hydraulic clutch drive path, including the slave cylinder (see Chapter 6).
31. In case of significant losses of brake fluid, when the reservoir is completely empty, after eliminating the cause of the leak, it is necessary to bleed the hydraulic lines of the brake system and the clutch engagement drive (see Chapter 6 and 9).
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