NANO

508 BRAKE SYSTEM 3.4 BRAKE PEDAL PLAY INSPECTION : (ii) Depress brake pedal several times with the same effort as used while normal braking operation and observe pedal travel. If pedal goes deep down for first time and its travel decreases for the following depression, then air tightness is observed. (iii) If pedal travel doesn’t change then air tightness is not obtained. Inspect vacuum lines and sealing parts and replace defective parts. (iv) Repeat the entire test after replacing defective parts. (b) Check operation (i) With engine stopped, depress pedal for several times with the same effort as used while normal braking operation and make sure that pedal travel doesn’t change. (ii) Start engine and depress brake pedal. A small increase in pedal travel indicated satisfactory functioning of booster. But if there is no change in pedal travel, it indicates a malfunction. (c) Check air tightness under load : (i) Start engine. Depress brake pedal. Stop engine while holding the brake pedal in depressed condition. (ii) Hold the brake pedal in depressed condition for 30 seconds. If pedal height doesn’t change it indi- cates proper operating condition and if pedal travel rises it indicates malfunctioning. Brake pedal Free Play, should be kept 1 - 2 mm as shown above. If it is out of specification check stop light switch for proper installation and adjust it as necessary. Also check pedal shaft bolt for looseness. Brake shackle pin should rotate freely on pedal. Ensure proper lubrication applied on it.