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Tech Talk with Master Power Brakes

How To: Diagnose and Fix Brake Drag

Posted by toby on Jun 5, 2017 4:20:00 PM

Whether you’re installing new brakes on your classic car or working on an existing system, brake drag can be a frustrating and challenging thing to diagnose and locate. On a positive note, the problem is usually a pretty simple repair once you find the culprit.

What Is Brake Drag?

Brake drag happens when the brake pads or shoes don’t release completely when the brake pedal is released, and is typically a result of mechanical issues or hydraulics. It is highly recommended to fix the dragging brakes as soon as possible, because it can lead to overheated parts and potential damage to the braking system, or worse yet, an accident.  

Referring to the checklists below will help you identify and repair your brake system’s brake drag woes so you can get back out on the road.


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Topics: brag drag, brake hose, classic cars, how to, How To Series, hyfraulic brake drag, master cylinder, mechanical brake drag, metering valve, repair

Single vs. Dual Reservoir Master Cylinders

Posted by toby on Apr 24, 2015 9:22:56 AM

When it comes to brakes, you need think of a complete system consisting of components working together to stop your vehicle.  As brake systems evolved from 4 wheel drum systems to rear drum/front disc combinations, the design of the various components making up the system changed in order to keep pace with the new technology.  One of the best examples of this is illustrated by the changes in master cylinder design.

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Topics: drum brakes, dual master, single reservoir master, Vintage Cars, Classic Car Brakes, Disc Brakes, master cylinder, Master Cylinder

Master Cylinder FAQ’s For Classic Car Owners

Posted by toby on Jan 6, 2015 9:33:40 AM

The master cylinder is a critical component of your brake system.  Should a master cylinder fail, we have a safety problem that is even more compounded if you are driving a classic car with a single reservoir master cylinder. In addition to our own safety, we also endanger the drivers sharing the road with us.  This post offers a brief description of how the master cylinder works, explains why the unit may fail, and offers some answers to commonly asked questions. 

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Topics: brake systems, brakes, classic cars, Vintage Cars, master cylinder, Master Cylinder

How To Series: Syringe Bleeding the Master Cylinder

Posted by toby on Mar 20, 2014 9:07:34 AM
Plastic Syringe for Bleeding Brakes

Some of our customers wonder why we include syringes with our disc brake conversion kits and how to use them.  This illustrated post explains brake system syringes and how to use them.

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Topics: bench bleeding, how to, How To Series, combination valve, master cylinder

Tech Brief Follow-Up: the Booster Pin to Master Cylinder Gap

Posted by toby on Feb 15, 2014 9:53:19 AM

Those of you who read our newsletter may recall a recent article discussing the booster pin to master cylinder gap and how an incorrect gap can cause a soft pedal.  In the article, we shared a picture that prompted one of our readers to send us a note.  Here is what he had to say:

Criticizing the experts: I believe your Booster Push Rod Gap illustration is in error...are you not showing a "manual MC" with a deep recess for the push rod? It appears you are using a (Power) with a manual MC instead of a MC with a dimple plunger. True or False?

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Topics: brakes, classic car, How To Series, push rod, soft pedal, brake boosters, master cylinder

Got A Soft Pedal? Don't Forget The Booster Pin to Master Cylinder Gap

Posted by toby on Jan 28, 2014 10:24:28 AM

A common problem and a question we answer more than we can remember is “Why does my pedal feel soft?” in my power brake system. One of the most overlooked things is probably the simplest fix.

Extending out of the booster is a pin. This pin simply extends into the piston in the back of the master cylinder. Have you ever set this distance? If you answered no, not only is this something you must do, it may be the reason for your soft pedal. Have we confused you? Take a look at the picture below and see if this helps.

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Topics: booster pin, brakes, classic cars, diagnosing and fixing soft pedal, How To Series, soft pedal, master cylinder

Upgrading Your Brakes? S. Kellie Colf Helps You Match the Right System Components to the Job

Posted by toby on Sep 9, 2013 10:28:51 AM

S. Kelli Kolf’s “ Stop It:  Information You Need to Know About Automotive Braking Systems”, which appears in September’s issue of Hot Rod and Restoration is an excellent go-to source for diagnosing common brake problems and making effective upgrades.  Whether you are a garage rat with years of brake repair and upgrade experience or you are working up the courage to take a first shot at your classic’s brakes, you should check out this article.  In case you are looking for a sneak preview, we’ll use this post to cover some of the most important information found in the article below.

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Topics: bench bleeding, brake fluid, Brake Pads, drum brakes, How To Series, power brakes, upgrading brake systems, master cylinder, repairing classic car brakes

Master Cylinder Bore Size Affects Pedal Travel Distance and Effort

Posted by toby on Jul 5, 2013 3:38:26 PM

Converting manual brakes to power-assisted brakes is a daily job here at Master Power Brakes. But we also have loads of manual brake enthusiasts and car collecting hobbyists among our customers. Whatever your preference, because components like brake boosters and master cylinders come in a variety of sizes and configurations, you may really need some help sorting out available options to optimize your brake components based on your vehicle. Tada! Enter the tech pros here at Master Power Brakes.

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Topics: bore size, master cylinder, Master Cylinder

How To: Syringe Bleed a Master Cylinder

Posted by rick on Dec 12, 2012 10:20:30 AM

Sometimes we get questions from folks wondering why we include syringes with our power disc brake conversion systems and how to use them.  This illustrated post explains brake syringes and what to do with them.

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Topics: bleeding brakes, How To Series, syringe bleed brake master, master cylinder

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