Servicing Hydroboost Brake Units

Servicing Hydroboost Brake Units

Three tips to prepare you for hydroboost brake unit service.

Brake boosters amplify the force applied to a brake pedal, increasing the power of the brakes. There are three types of brake system boosters. Two of the three include vacuum brake boosters and vacuum pumps, also known as “power brakes.”

In this Tire Review Continental Tire Garage Studio video, we give you tips on how to service the third type of brake system booster – hydraulic brake boosters or hydroboosters.

A hydroboost brake system is technically known as a hydraulically boosted brake system. It differs from vacuum brake boosters and vacuum pumps by using hydraulic fluid that’s supplied by the power-steering pump. The pump then supplies power steering fluid to the steering gear or steering rack to boost brake pedal force.

While vehicles with hyperboost are not hard to work on and typically don’t require special tools, they require service information and a working knowledge of the system. Here are three tips to ensure you are confident and ready to service hydroboost brake systems.

Tip No. 1: Listen up. Literally! Hydroboost units, when functioning correctly, will make specific sounds that are not present in vacuum booster systems. These noises occur when the brake pedal is manipulated in a manner not associated with everyday driving habits. The general operating noises are hissing and clunk or clatter noises.

Tip No. 2: Perform a basic function test. To check if a hydroboost system is functioning, perform the following test. First, with the engine off, pump the brake pedal until it is stiff. Then, start the engine. The brake pedal should sink then push back up. The sinking is from the pressurized power chamber. The feeling means full pressure in the power steering system.

Tip No. 3: Flush the system. Vehicles equipped with a hydroboost power system will benefit from a periodic power steering flush. When performing the flush, apply and release the brake pedal slowly to allow the new fluid into the hydroboost.

Don’t forget to follow us on Instagram and Facebook and subscribe to our YouTube channel for more tire, service and shop operations videos.

You May Also Like

Understanding EV weight to master ride control

EVs are significantly heavier than their internal combustion counterparts, often 1,000 to 3,000 pounds more due to battery packs.

TR-Continental-ridecontrol

Electric vehicles are not immune to the harsh road conditions that today’s gas-powered vehicles take on daily. Potholes, curbs, and rough pavement will eventually take a toll, requiring the repair or replacement of shocks, struts and springs over time. Let's find out what to expect when servicing EV suspension and ride control.

Prepare your tire shop for the future

You have an opportunity to capture extra profits and future-proof your business.

TR-Continental-shopprep
How TPMS sensors broadcast vital information

Understanding the signal patterns, frequencies and wake-up behaviors involved is key for effective diagnosis and repair.

TR-Continental-tpms-sensor-signals
LT tire segment trends and growth expectations

There are some key trends dealers need to be aware of across the different LT tire categories when selling to customers.

TR-Continental-lttires
Recommending summer tires based on customer demand

Let’s talk about why clear communication with customers is key with this segment.

TR-Continental-summertires

Other Posts

Gallery: Turbo Wholesale Tire open house

Highlights from this year’s annual Turbo Wholesale Tires open house event, which featured a trade show, dinner and buyers event.

Turbo-Wholesale-Tires-open-house-raffle
Continental celebrates U.S. tire manufacturing plant anniversaries

Continental is celebrating five years in Clinton, MS, 10 years in Sumter, SC and 50 years in Mount Vernon, IL plants.

Continental_clinton-manufacturing-plant
Gallery: Yokohama debuts new Geolandar A/T4 tire in Horseshoe Bay, TX

Tire Review Editor David Sickels put the new A/T tire through its paces through mud, gravel, giant rocks, deep water and more.

Yokohama-AT4-Closeup
Turbo Wholesale Tires introduces Lexani Volt-EC EV tire at annual open house

The open house also featured a trade show, a buyers event and dinner for dealers part of the Turbo Wholesale Tires group.

Turbo-Tire-Trade-Show-Phillip-K-Todd