In this episode of Classic Car Restoration, host Mark Lambert evaluates the brake system on our 1938 Packard, checking the hoses and master cylinder. He removes and rebuilds the master cylinder and then re-installs it. He also shows how to make new brake lines using a metal tubing bender. Lastly, he bleeds the brakes and makes the final adjustments. In this fourth segment of episode 405, Lambert bleeds the brake system and makes final adjustments.Note: This is a summary of steps included in the automotive restoration procedures shown in this episode of Classic Car Restoration. These are general guidelines for restoration procedures on this particular make and model of vehicle, and for the level of restoration selected for this project. There may be variations in procedures depending model, condition of vehicle, level of restoration undertaken and the types of replacement parts or upgrade kits selected. Always follow proper safety precautions, and read and follow manufacturer's guidelines, diagrams and safety notices that come with any replacement parts or kit that you select.
Materials used in this episode:Standard automotive tools (socket-wrenches, screwdrivers, nut-drivers, etc.)
Regular drill with break honing bit
Replacement break fluid
Replacement master cylinder kit
Tapered drift punch
Tubing cutter
Tubing flaring tool
Tubing bender
Brake spoon Bleeding the Brake System Caution: Always use fresh brake fluid from a sealed container and do not agitate the bottle because it will put more air into your brake system. Alert: The proper procedure for bleeding a car is starting with the wheel farthest from the master cylinder. - Gently fill your reservoir to the threads. (If you drop any on the paint, remove immediately.)
Go to the bleeder valve (figure A). Our car had a pre-war bleeder valve, but today we used an updated valve to hook our hose to it (figure B). This way, you can see when the system is purged of all the air.
To bleed the system, pump the brakes or pull the brake pedal at the master cylinder (figure C).You will see the dirty fluid coming through. Keep checking your level.Refill the master cylinder with brake fluid as necessary until the fluid runs clear, without any trapped air.Pause at the top of each pedal return just for a moment to let the cylinder refill. Immediately tighten the bleeder screw when the air is out of the system. Final Brake Adjustments
- Adjusting your brake shoes can be done by inserting a brake spoon in the little window inside the brake cover. There should be a cover over the window. If it’s Pre- War, replace it with a neoprene cover (figure D).
- Once your spoon is in (figure E), you can hear it making contact with the star wheel (figure F). What you want is a gentle, even drag on this all the way around. After you push it and lift your hand, you only want about one full rotation of the tire (figure G).
- Plug the hole.
- Put pressure on your pedal and test this system for any leaks (figure H). You want to put this system under the most amount of pressure because that way you can check for leaks. If you have any leaks, tighten the bolts up.
RESOURCES :
Resources and Special Thanks for Classic Car Restoration 400 series
The Packard Club
Columbus, Ohio
(National & regional clubs, car shows & judging, magazine, resources, etc.)
The Cormorant magazine
The Packard Club
www.packardclub.org
Packards International Motor Car Club
(National owner's club, judging rules, magazine, newsletter and other resources)
Santa Ana, CA
Packardsinternational.com
Packards of Chicagoland
(Regional affiliate of The Packard Club)
Elmhurst, IL
Packards of Chicagoland
America's Packard Museum
Dayton, Ohio
www.americaspackardmuseum.org
The National Packard Museum
Warren, OH (the birthplace of the Packard)
www.warren.org
The Packard Motor Car Foundation
(Foundation for preserving the Packard marque)
Restoring the Packard Proving Grounds and other Packard activities.
www.packardmotorfdn.org
Motorbooks International
www.motorbooks.com
Automobile Inspections LLC
(Nationwide automobile appraisal & inspection services, including classic cars)
Hartford, CT
www.automobileinspections.com
Classic Auto Appraisals
(Evaluation of Classics, Street Rods, Antiques, Competition Cars, Exotics, Commercial Vehicles and Hand Crafted Vehicles).
www.autoappraisals.com
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