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Checking the brake booster
| Fig. 8.8. Device brake booster 1 - pusher to the master cylinder; 2 - return valve with a rubber gasket; 3 - the case of the membrane; 4 - pusher of the brake pedal
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The brake booster uses an engine produced by the intake vacuum depression and loses part of its reinforcing action in the event of leakage connection rubber seal. When light passes swinging hose air rubber seal on the amplifier is leaking, it must be replaced immediately.
1. Stop the engine, repeatedly press the brake pedal and hold it down. 2. Start up the engine. The pedal should move a little bit forward. If not, the following reasons:
| Fig. 8.9. If the gentle swaying of a vacuum hose air passes, the rubber seal on the amplifier is leaking and needs replacement as soon as possible
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- Leaky vacuum hose from the intake pipe to the amplifier (Fig. 8.9). In this case, replace the hose;
| Fig. 8.10. To check the valve, disconnect the hose (arrow) from the amplifier
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- Faulty check valve in the vacuum hose. To check the valve, disconnect the hose (Fig. 8.10, arrow) from the amplifier. In good condition must pass through a hose at the air blowing, and not to pass to retract; - Worn rubber ring between the master cylinder and booster. To replace the necessary dismantling of the master cylinder; - Clogged air filter on the pushrod. Remove the filter from the rod of the plunger hook wire. The new filter is cut to the middle and replace the pusher. Note that the filter rod firmly encircle otherwise could fall into the amplifier unfiltered air; - Damaged membrane amplifier. In this case, the repair is impossible. Power needs to be replaced in assembly.
PRACTICAL ADVICE The brake pedal and brake linings Free running of the brake pedal should be no more than a third of the entire pedal stroke. If the pedal prozhimaetsya more (check the hand), check the disc brakes - are possible heavy wear or jamming pad linings, corrosion of the brake caliper. Check by pressing the pedal does not replace the inspection pad linings: the piston cylinder pushes shoes with worn pads so far as to reverse to the starting position after releasing the pedal as large. Proceedings pedal thus remains almost unchanged until the lining is not worn down to the minimum value. If the pedal press repeatedly becomes smaller, the system may have air - bleed the system |
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