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There are several ways the TREADLE VALVE can stick. A threaded hose simply screws into place while a push-connector hose will require a nice clean 90-degree cut on the end.

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Use only the Bendix Air System Inspection Cup BASIC test and the methods described in this guide for.

Air brake troubleshooting. Brake chambers also have problems with leaking. Printed on recycled paper CHECKLIST 2 If there is excessive leakage in the supply side of the pneumatic system one or more. Cuases Problems in air brake system Remedies Solution.

Insufficient air in the system. To operate air brake equipped vehicles are encouraged to review this manual on a periodic basis to ensure they are fully aware of the proper method of inspecting an air brake system and identifying problems that can occur when the system malfunctions. 2 If pipe dope is used on fittings use it sparingly.

Discontinue using this test. The brakes will not work if the treadle valve sticks or does not perform correctly. This procedure will work for older Pre-121 equipped trailers regardless of how many tanks and valves or types of.

Identify the source of cause and rectify it. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy Safety How YouTube works Test new features Press Copyright Contact us Creators. See page 19 for more about foundation brakes Frictional forces slow the wheels and the vehicle comes to a stop.

AIR BRAKE SYSTEM TROUBLESHOOTING 1 Before replacing any valve with a new or remanufactured valve be sure to blow the air lines out either using the vehicles own air supply or shop air. Restricted or broken pipe or hose. AIR BRAKE SYSTEM TROUBLESHOOTING 1 Before replacing any valve with a new or remanufactured valve be sure to blow the air lines out either using the vehicles own air supply or shop air.

Bendix Air Brake Maintenance Manual This maintenance manual consists of instruction and service data sheets and provides complete information on most air-brake system components. When a brake chamber diaphragm fails it. These lines connect the air brake system together and can crack chafe or become loose due to vibrations all of which can cause air leaks.

Problem sluggish application or release. The illustrations and explanations of various types of brake system designs are provided. Brake shoes worn out.

The most common problem with air brake valves is air leaks. Log on and learn from the Bendix experts at brake. When you are troubleshooting first make a visual inspection and check all the obvious things-open air drain cocks off-track compressor belt broken air lines and so forth.

Air Brake Charging System Troubleshooting How to use this guide. Leaky defective brake. Pressing down the treadle valve pressurizes the air brake canisters pushing a rod to the brake adjusters with the correct degree of pressure as the brake pads press on the drum.

They are subjective and error prone. Next perform an air buildup test and an air leakage test. Do not use this card test to diagnose compressor oil passing issues.

Dirt is the greatest cause of premature air valve failure. Use soapy water to check the valves for leaks. General information concerning air braking systems can be found in chapter 10 of the Construction Mechanic 32 NAVEDTRA 10644-G1.

Identify the source of cause and rectify it. The line from the compressor to the dryer or hot line can become plugged with carbon deposits. 10 Oil Test Card Results Not a valid test.

Answer check cam operation of basic brake check air line for restriction or leak align linkage check chamber return spring adjust brakes check angle should approach 90 degrees on application check for dirt and gravel inside chamber- obstruction. In addition to information on how each device operates the sheets contain information on installation maintenance and disassemblyassembly instructions. When the brakes are released the air in the brake chambers is able to be quickly rel eased and enable the vehicle to drive away.

All types of trailer air brake systems can be identified for troubleshooting purposes by starting from the brake chamber or spring brake assembly. No air pressure in brake system. Brake chambers and applies force to the push rod transferring the force to the SCam or air disc brake.

The brake valves need to operate properly for the brakes to work properly. This can also get into the unit and cause a failure. Visually inspect air brake lines especially if you notice a slow buildup of air pressure.

Dirt is the greatest cause of premature air valve failure. When its time to reconnect the air lines check your connection type.