The vacuum brake booster is the most common type of booster used in the braking system of a modern car. When it breaks down, the effort on pressing the brake pedal increases significantly, which adversely affects the control of the machine. To avoid this, it is necessary to check the check valve of the vacuum booster. So how do you do this?
Necessary
Two cloths (one for hands, one for parts) and a screwdriver
Instructions
Step 1
The first step is to check the tightness of the connection of the fitting on the inlet pipe with the vacuum hose and, accordingly, with the check valve of the vacuum booster. Let us recall that the tightness of a joint is a tight connection of parts to each other. There should be no holes, cracks, gaps between them and no air should pass through. If you find something, then certain damaged parts should be replaced. And if there is no external damage, but simply the parts are leaking, then eliminate this drawback and try to press the brake pedal 6 times, but do not forget that the engine must be turned off. Then start the engine itself and see if the brake pedal has moved forward, if not, then we continue the test further.
Step 2
To check the check valve, it is necessary to loosen the fastening clamp and disconnect the vacuum hose from the valve using a screwdriver. Then remove this valve from the servo vacuum housing and place it on a cloth for convenience to dry your hands.
Step 3
Slide the base (spout) of the rubber bulb onto the large-diameter fitting and squeeze it. A fitting is a piece of pipe that inserts a valve into a vacuum booster. But do not forget that all the air must escape through the valve. If you do not have a pear on hand, then the valve can be blown out with your mouth.
Step 4
Then release the rubber bulb, if the pear has taken its original form, then the valve is faulty (it passes air in both directions), then it should be replaced. And if it remains in a compressed state, then the valve is in good order, with which we congratulate you.
