The basic difference is that your automotive brakes are actuated by hydraulic pressure while your electric trailer brakes are actuated by an electromagnet. Apply a slight amount of pressure to the brake pedal and install a brake pedal depressor. Service notes this service manual describes the service and repair procedures for the heavy duty wedge drum brakes. Maintenance manual 4 cam brakes and automatic slack. It may be necessary to back off the brake adjuster to remove the drum. If you can find an old repair manual, you will find the diameter specs buried somewhere in it. Some drum brakes provide an inspection hole on the back side, where you can see how much material is left on the shoe. According to the rotor or drum, select the appropriate adapter. Brakes are the most essential safety feature of any vehicle, so only fix them yourself if you have the right tools and enough confidence to do the job well.
Using the necessary spacers supplied with the brake. Understanding the basics of brake repair helps you make better decisions when its time to replace faulty parts, reset the abs light or perform general maintenance. Adjust if necessary, visually check for loose fasteners. Allow th e solution to flow between the brake drum and the brake support or the brake rotor and caliper. Whatever the reason, its possible to find car repair manuals online. According to data collected by the aaa, the average motorist pays 60. You can take care of this task on your own if you know ho.
Hydraulic surge drum brakes hydraulic surge drum brakes have been the boat trailer standard for decades. Cars loaded heavily, particularly during long trips, are placing severe stress on its drum brakes and entire brake sy. For all your auto repair manuals and labor time guide needs, purchase motors expansive collection exclusively through matcos nearly 2,000 distributors. Keeping your brakes working properly is an important part of vehicle maintenance. Click on the meritor logo on this page to go to service notes. Small sedans, suvs, hybrids and electric vehicles are the cheapest to run while pickup trucks cost way more. Your new ranger brake lathe was designed and built with safety in mind. Installation instructions and service manual model 660 actuator for trailer brakes 6,600 lbs capacity drum brake ready or disc brake ready us patents. The most common type of brake master cylinder repair is fixing a leak in the seals. Any pits in the races will prevent the drum and rotors, too from setting up correctly on the lathe. However, please remember that these warnings are not all inclusive. Original style for an exact fit for all models with manual drum brakes.
Check that the brake caliper brake adjuster cap is in place. As to machining, when drums are mounted on the cutting lathe they reference off their bearing races, which are pressfitted into the hub. Bendix commercial vehicle systems document library. The ultimate guide on how to replace drum brakes youtube. The electric brakes on your trailer are similar to the drum brakes on your automobile. Learn how to replace your drum brakes including the wheel cylinder and bleeding the brakes. Get the complete scoop on drum brakes and check out some amazing graphics. Our selection provides the fundamentals to help you get a better understanding of whats involved in maintaining your brakes and knowing when is the right time to replace them. Brake systems for medium duty trucks 305x76 park brake. However, your overall safety can be increased by proper training and thoughtful operation on the part of the operator.
As the tow vehicle slows down, the trailer wants to keep moving. Click on the title on this page to go to the maintenance manual index. Service notes date update page 01 2014 caution piston housing screw removal. Ar 1 04318081 fluid, brake ar 2 52008325 brake drum ar 2 52007716 brake rotor ar 2 03699678 seals, front wheel bearing equipment required. This book is a musthave for the serious doityourselfer. Maintain, troubleshoot, repair drum, disc, abs brake systems. Cars loaded heavily, particularly during long trips, are placing severe stress on its drum brakes and entire brake system. You can learn how to change the brake pads and rotors yourself in no time at all. Sometimes you buy a used car and its missing the car repair service manual. Installation, repair and adjustment of motor vehicle brake equipment shall be performed in accordance with applicable laws, regulations and the.
The wheel hub and brake assembly components should be thoroughly wetted to suppress dust before the brake shoes or brake pads are removed. Brake adjusters handbook bureau of automotive repair. The drum brakes on the rear are equipped with self adjusters, but they will not work due to the light weight of the trike. This is typically a brake master cylinder repair that will become necessary after a few years when the seals wear out. Elsa 195225250 air disc brake 3 service manual issue update detail the table below provides a brief description of the changes made from the previous 102015 edition of the service manual. Advertisement the most common service required for drum brakes is changing the brake shoes. Meritor te9000 service service manual pdf download. The wheel cylinder bores extend hydraulically upon demand and push the shoes outward to contact the interior diameter of the drum. Advertisement drum brakes work on the same principle as disc brakes. Some brakes require manual adjustment to move the linings closer to the drum. Confirm brake actuator being used can supply enough hydraulic pressure and volume to actuate disc brakes. Once you have the drum removed, it is a good idea to clean the area of dust with compressed air or brake wash spray. Other topics covered by this manual include, hydraulic system service, antilock brake system abs fundamentals, modifications, and critical fastener torque specifications. Critical areas are precision machined, and all are balanced using a cut in the squealer band figure 1.
You will need to jack up the car and remove the rear wheels to gain access to the rear brake components. It should be more than 18 above the rivets on riveted linings, and 18 above the metal on bonded linings. Surge actuator service manual legacy ufp a60, a75, a84, xr84. If this occurs, refer to the brake troubleshooting diagram for your type of brake. The brake system is one of the most important safety features on a vehicle. Do not operate or repair this equipment without reading this manual and the important safety instructions shown inside. The master cylinder forces brake fluid to the drum brakes. If your vehicle has drum brakes, you need to adjust them periodically to prevent them from dragging. Follow all company procedures when servicing or repairing equipment or components. This is done through the brake adjustment hole in the drum or on the backing plate using a brake adjuster tool to turn the adjuster to loosen the brakes enough to remove the drum.
Light duty 6008k complete service manual lit00100 light duty axle identification. These trailer brakes are dependable and quick to react, are independent of the tow vehicle, and come on automatically when you press the brake pedal in the tow vehicle. Many cars today use drum brakes on the back two wheels. Maintenance manual 4 cam brakes and automatic slack adjusters.
Inside each drum brake is a wheel cylinder that expands with the surge of brake fluid, pushing the brake shoes against the inside of the brake drum. The brake shoe composition is softer than the cast metal drums and wear. Non asbestos brake lining build month sequential number a or r identifying the serial number table b axle letter code brake type z 420 x 220 drum brake d d duco disc brake q 420 x 180 drum brake table e for maximum and minimum suspension offsets, refer to relevant meritor ta d duco suspension installation layout. Item number description category product group literature type available for. Place removal and refitting of brake drum the hub cap on a clean, flat surface. Failure to use correct brake fluid may result in brake. The actual in service rating is limited to that of the ball and hitch being used or the trailer manufacturers g. Manufacturer ofammco, coats and bada automotive service equipment andtools.
Add the safety, reliability and performance of manual disc brakes to your 6675 ford bronco with our drum to disc brake conversion. As a common rule, disc brakes require more pressure and larger volume of fluid than drum brakes of same size. I go through the steps so anyone can remove their drum brake. Brake drum gauge dial indicator brake rotor micrometer repair procedure. The only way to be sure of the condition of drum brakes is to regularly pull the drums and check the lining thickness. In keeping with these service proceduresas published in bendix service manual bw7258 a thorough visual inspection for brake wear, loose fasteners, broken parts, andor obvious damage should be made each time the brake is serviced or the wheel and drum is removed. Operation maintenance service manual dexter brakes. Brake drum brake lining repair stages in mm brake snk 420 max. Recommended service intervals are after the first 500 miles and then every miles.
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