Mercedes Benz S420 Vacuum Supply Pump
Commom Causes of Problems with the Mercedes Benz S420 Vacuum Supply Pump
Without your car's vacuum supply pump, your brakes and A/C system won't be able to perform their tasks efficiently. Your vehicle's vacuum supply pump is the one responsible for providing suction that would put the car's power brakes to work. It's also the one that gets rid of moisture from the A/C and ventilation system. That is why it's important to make sure that your Mercedes Benz S420's vacuum supply pump is always at its best condition. Here are a couple of things to take not of when you start noticing problems with your Mercedes Benz S420 vacuum supply pump.
The brakes become harder to push than usual
For the power brake to function correctly, it needs the suction provided by the vacuum pump. A vacuum pump failure will cause the brakes to become much harder to push than usual. The power brake booster will stop working properly as it will lose the right brake boost. When you start to notice that your brakes are getting harder to push, this could be a sign of a vacuum pump that's beginning to fail. Check them immediately to see what remedy it needs or if it needs to be replaced.
The pump loses suction
If you feel weak or no suction at all when you place your finger over the hole on the vacuum pump while the engine is running, this is a sign of a problem in your vacuum supply pump. This problem usually requires a replacement. However, if you feel that there is a strong suction in the pump but the braking power is still not working properly, it would be best to check the entire system if there are leaks and other forms of damages with the components around the vacuum pump.
Oil is leaking from the vacuum pump
When you notice oil leaking from your car's vacuum pump, this could be a sign of bad internal seals. The most common area for these leaks is the vacuum system around the oil filter housing. Make sure to check other locations as well and do a meticulous inspection for loose, cracked, or missing vacuum lines and fittings. You should also listen carefully and watch out for hissing or whistling sounds as these may indicate that there is air coming out.