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Is Crud Crippling Your Trailer Air Brake System?


Trailer Break Repair / April 17, 2018

trailer air brake system

Your trailer air brake system is comprised of multiple components, each designed to cut crud, keeping your system clean, safe, and operational. Without proper maintenance, however, these essential components will fail to function properly, crippling your trailer or worse, leading to brake failure and crash.  

How Clean is Your Air Brake System?

These components, when properly spec’d and maintained, work together to keep your air brake system clean and operational:

  • Compressor filter
    This filter, located at your compressor outlet, removes most system contaminants including moisture, oil and dirt, making regular replacement key to safeguarding air brake system components.
  • Air Dryer
    Virtually standard on today’s semi-trucks, air dryers, as the name suggests, keep moisture out of your air brake system. Checking the condition of your air dryer at-least annually, including desiccant, purge and check valve operation, ensures the function of this key component.
  • Air Tank Drain Valve
    After the compressor filter and dryer clear things up, your air tank drain valve allows for the removal of what moisture and contaminants remain. Making certain this valve is drained regularly is essential, and should be part of your pre and post-inspection checklist.
  • Gladhand Clamps
    These coupling devices are located on the rear wall of the cab/sleeper. When twisted on,
    they connect the tractor to the trailer, supplying air to the trailer brakes. With the aid of a rubber seal, they prevent water from entering and air from escaping the system. ‘Dummy’ gladhands, used when the truck and trailer are not connected, likewise keep dirt and debris from entering the air brake system, and should be used every time the trailer is detached from the tractor. Because rubber seals on gladhands get dirty and brittle over time, regular cleaning and replacement is a must.

Cutting the Crud

If you’ve ignored your air brake system, or a contaminant test reveals a need for attention, professional inspection and maintenance is advisable to ensure the safety of your air brake system. Cleaning system components typically involves a multi-step procedure where safety and attention-to-detail is paramount, from safely securing wheels, to carefully blowing out the system with clean, dry compressed shop air (without introducing additional contaminants), and inspecting valve diaphragms for oil.   

Are Your Brakes Safe?

At Ainsworth, our certified, professional technicians have 115 years of combined experience, quickly identifying and rectifying air brake system repair issues in our 20,000 square foot, 13-bay repair facility with OEM-quality replacement parts. Ensure the safety of your truck, cargo, and most importantly yourself and roadside passengers. Smooth-out and balance your brakes with the help of the A+ BBB-rated services of Ainsworth Trailer Repair. Contact us for a free estimate today.