5 Common Mistakes in Heavy-Duty Truck Air Brake System Inspections and Adjustments

Jayson Matos • August 20, 2024

Despite the growing interest in Electronic Braking Systems (EBS), Anti-lock Braking Systems (ABS) continue to be the preferred choice for heavy-duty trucks due to their reliability. Here are some common mistakes made during air brake system inspections and adjustments with tips on how to 


Neglecting Regular Inspections

Regular inspections are critical to detect wear and tear before they become costly breakdowns. Procrastinating on this critical task can lead to accidents, injuries, and other risks. 

You should visually inspect the air brake system every three months and more thoroughly on a schedule according to the manufacturer’s recommendations. Plan for extra visual inspections if your fleet is exposed to extreme weather, severe temperatures, or other environmental hazards.


Improper Adjustment of Brake Components

Improper adjustments can occur due to a lack of understanding of the correct adjustment procedures or the use of incorrect tools. For example, an imperfect slack adjuster can lead to excessive brake shoe wear or inadequate braking force. 

Make sure your crew follows the manufacturer's guidelines and uses the right tools for adjustments and repairs. A minute saved with a rushed job can cost many days' worth of issues later.


Ignoring Manufacturer Specifications

Each brake system has specific manufacturer specifications and guidelines. Doing things like using incorrect brake linings or failing to maintain the recommended air pressure can lead to decreased performance and increased risk of brake failure. 

Always refer to the manufacturer’s manual and adhere to the specified maintenance practices.If you are unsure if a substitute part will work for your fleet vehicle, contact hardware supply experts to discuss your options.


Failing to Check Supporting Hoses and Valves

Air leaks in the brake system can severely affect braking performance. Common areas where leaks might occur include the air hoses, valves, and connections. During inspections make sure to:

  • Check for cracks, bulges, and other deformities in the hoses
  • Gently pinch the hoses to check for blisters and soft spots that indicate internal damage
  • Check joints, valves, and connectors for signs of corrosion and loose connections
  • Take care that all tubes and parts are clean during repairs and replacements. Any debris that makes its way in is not likely to come back out
  • If you suspect a leak, cover the hose with soapy water and look for bubbles.

Replace any faulty parts early on to avoid more costly repairs later. A customized inventory management service can help you avoid long back orders and delays.


Overlooking the Air Dryer and Filters

The air dryer and filters play a critical role in maintaining the quality of the air within the brake system. Moisture and contaminants in the air can cause corrosion and damage to the brake components, especially in humid areas like the Gulf Coast. 

The staff of Fleet Magazine recommend, “Drivers and fleets should always monitor the quality of the air in their service tanks to ensure air dryers are functioning properly. If excessive moisture—or oil mixed with water—is present in an air system, the air dryer’s cartridge may need to be replaced.”

Regularly checking and replacing the air dryer cartridge and filters can prevent moisture buildup and ensure the longevity of the brake system. Refer to the manufacturer’s appropriate data sheet for the best intervals.


Let Action Supply Help You Maintain Your Fleet

Whether you need the gold standards in fleet maintenance parts or robust inventory management, we are committed to providing you with the highest quality customer care. Our inventory experts will work hard, earn your trust, and help you get the job done right. Contact us today to discuss your fleet maintenance needs.

January 14, 2026
The start of a new year is more than a calendar reset, it’s an opportunity to strengthen the systems that keep your business running efficiently. For industrial, commercial, and maintenance-driven operations, having the right supplies in place at the right time can mean the difference between staying productive or falling behind. Building a smarter supply strategy early in the year helps businesses control costs, reduce downtime, and remain competitive in an increasingly unpredictable supply environment. Here’s how to evaluate your needs, forecast usage, and put reliable systems in place for the year ahead. Why Strategic Supply Planning Matters Reactive purchasing often leads to higher costs, rushed decisions, and inconsistent inventory levels. Without a clear supply plan, businesses risk overordering, stockouts, and delays that impact operations and customer commitments. Strategic supply planning allows organizations to: Improve operational efficiency Reduce emergency purchases and downtime Stabilize pricing through better forecasting Build stronger supplier relationships When supply strategy is aligned with operational goals, purchasing becomes a competitive advantage, not just a necessity. Step 1: Evaluate Your Current Supply Usage The foundation of any effective supply strategy is understanding what you actually use. Reviewing historical purchasing data provides valuable insight into patterns, seasonality, and inefficiencies. Key questions to ask: Which products are used consistently throughout the year? Where do usage spikes or slowdowns occur? Which items frequently require rush orders or last-minute replenishment? Identifying high-use and critical items helps prioritize where planning and standardization will have the greatest impact. Step 2: Forecast Demand with Operational Input Accurate forecasting requires collaboration across departments. Operations, maintenance, and procurement teams all play a role in anticipating demand. Consider factors such as: Planned maintenance schedules Production volume expectations Seasonal workload fluctuations Equipment upgrades or expansions By incorporating operational insight into forecasting, businesses can better align inventory levels with real-world needs, reducing both excess stock and shortages. Step 3: Standardize Products and Vendors Standardization simplifies purchasing, improves consistency, and often reduces costs. Evaluating opportunities to standardize frequently used supplies—such as safety products, fasteners, tools, or consumables—can streamline procurement and inventory management. Working with a trusted supplier also provides access to product expertise, availability insights, and alternative solutions when supply challenges arise. Step 4: Set Systems in Place Early Establishing purchasing systems early in the year creates stability throughout the months ahead. This may include setting reorder points, implementing blanket orders, or coordinating scheduled deliveries for high-use items. Proactive systems reduce the need for emergency purchases and allow teams to focus on operations rather than constant supply management. Step 5: Build a Supply Partner, Not Just a Vendor A strong supply strategy goes beyond transactions. Partnering with a knowledgeable supplier adds value through product recommendations, inventory support, and responsiveness when challenges arise. The right supply partner understands your business, anticipates needs, and helps you adapt as conditions change throughout the year. How Action Supply Supports Smarter Supply Planning Action Supply works with businesses to develop supply strategies that support efficiency, reliability, and long-term success. By helping customers evaluate usage, identify opportunities for standardization, and implement dependable supply systems, Action Supply helps operations stay prepared, not reactive. Whether planning for routine maintenance, large-scale projects, or day-to-day operations, Action Supply provides the products and support businesses need to stay competitive all year. FAQs Why is supply planning important at the start of the year? Early planning helps businesses forecast demand, stabilize costs, and reduce disruptions caused by shortages or emergency purchases. How can businesses improve inventory efficiency? Evaluating usage data, forecasting demand, standardizing products, and working with a reliable supplier are key steps toward more efficient inventory management. What should a supply strategy include? A strong supply strategy includes usage evaluation, demand forecasting, product standardization, purchasing systems, and a trusted supply partner.
December 16, 2025
Follow these proactive steps to help extend equipment life, maintain performance, and avoid emergency repairs during the coldest months of the year.
November 20, 2025
Finish the Year Strong with Smart, Strategic Purchasing