Used Volvo Brake Servo Units

All used Volvo Brake Servo Units listed on Breakeryard.com are tested, original (OEM) manufacturer parts and come with a 14 day money back guarantee. Breakeryard.com list cheap new OES or aftermarket car parts at discounted prices and used OEM car parts up to 80% cheaper than main dealer prices for Volvo from premium breaker yards from across the UK.

About Brake Servo Units

The brake servo unit, if fitted, is an aid to the hydraulic braking system. With the operation of the servo unit less force is required on the brake pedal.

The servo unit is situated in the braking system and has a connecting rod that runs between the brake pedal, the master cylinder and fluid reservoir and is commonly found in the engine compartment.

The Volvo brake servo unit is a bulbous cylinder which contains a central diaphragm. On each side of the diaphragm there are two separate chambers The cylinder has a vacuum feed from the engine manifold this maintains a vacuum in both chambers. When the brake pedal is pressed an influx of external air is sucked into one side of the diaphragm, the air pressure rises as the vacuum is broken which pushes the diaphragm to assist the movement of the master cylinder which forces the hydraulic fluid through the piping to the slave cylinders on the brakes of each wheel. When the footbrake is released the vacuum is restored to the chamber.

Signs that there's a problem with the Volvo brake servo unit can be that the pedal becomes heavy and requires increased force to operate the brakes. 

Volvo trivia

• Volvo is Swedish and was founded in 1924 by two brothers who designed and built the ÖV 4 because they realised that other cars couldn't cope with Sweden's harsh weather. The car was given the name 'Jakob' and had both a 1.9-litre four-cylinder engine and a three-speed manual gearbox.
• Volvo is one of the oldest companies in the world to be trading on the Stock Exchange. They have been trading consistently since 1935. The majority of car manufacturers didn't even exist when the Stock Exchange opened.
• There are more than 2000 Volvo dealerships around the world, with the highest number in the US and the UK.
• The Volvo 240 is considered the benchmark by which all car safety standards are set. The 240 is so well identified with driver, passenger, and pedestrian safety that the US government even purchased 24 of them just to test for themselves how safe they were.
• There's a theatre in Ireland where the patrons all sit in seats from the Volvo S80 luxury saloon. A local Volvo dealer saw the seats being used at the launch of the S80 and asked Volvo if he could have some for his local theatre.