Contact

  • 898 Valentine Ave SE, Pacific 98047
  • (253) 691-6645
  • frontdesk@sttrwa.com
  • Roadside Service 24/7/365

Air Systems

Air System Services for Commercial Trucks & Trailers

Air Brake, Suspension & Pneumatic Diagnostics | STTR, Inc. – Pacific, WA

Air systems are at the core of safe and reliable commercial vehicle operation. From brake performance to suspension stability, air-powered components must work flawlessly under pressure. At Sound Truck & Trailer Repair (STTR, Inc.), we provide complete air system diagnostics, repairs, and component replacements for semi trucks, trailers, and heavy-duty vehicles.

Whether you’re experiencing a slow build-up, air leaks, or brake lag, our team will diagnose the issue and restore your system to DOT-compliant condition—fast.

🔧 Full-Service Air System Repairs

We repair and replace all critical components in your truck or trailer’s air system, including:

✅ Air Brake System Components

  • Air Compressors

  • Air Dryer Units & Filters

  • Air Tanks & Reservoirs

  • Brake Chambers (Service & Spring)

  • Foot Valves & Relay Valves

  • ABS Modulators & Air Lines

  • Slack Adjusters & S-Cams

  • Check Valves, Pressure Protection & Drain Valves

✅ Air Suspension System Components

  • Air Bags / Air Springs

  • Height Control Valves

  • Air Lines & Fittings

  • Leveling Valves

  • Suspension Control Modules

We service all makes and models with OEM-grade parts and precision installation.

Air System Diagnostics & Testing

Is your system losing pressure? Building slowly? Failing inspections? Our experienced techs run comprehensive air system checks to identify:

  • Air leaks (audible or internal)

  • Faulty valves or regulators

  • Improper system pressure or buildup time

  • Moisture or contamination in tanks

  • Trailer supply line failures

  • ABS system communication faults

We use soap bubble testing, electronic leak detectors, and pressure gauges to track down leaks and weak points quickly and accurately.

⚠️ Common Signs of Air System Problems

  • Delayed brake response or low pressure alarms

  • Audible hissing or constant compressor cycling

  • Trailer brakes not releasing properly

  • Uneven ride height or sagging suspension

  • DOT violations related to air line condition or reservoir drainage

If you’re experiencing any of the above, don’t risk a roadside breakdown or OOS order—bring your rig to STTR for professional diagnostics.

🧰 Fleet Air System Maintenance

For fleets, a proactive approach to air system maintenance can prevent:

  • Costly service interruptions

  • Brake fade or failure under load

  • DOT compliance issues

  • Accelerated wear on suspension and braking components

We offer scheduled inspections, valve service, and tank drain intervals as part of your preventive maintenance plan.

🕗 Schedule Service Monday–Friday, 8 AM to 5 PM

Visit us at our fully equipped repair facility in Pacific, WA:

  • 898 Valentine Ave SE, Pacific, WA 98047

  • Open Monday through Friday, 8:00 AM – 5:00 PM

  • Serving the Puget Sound’s trucking and trailer community since 2008

Why Choose STTR for Air System Services?

  • ✔ Experts in Commercial Air Brake & Suspension Systems

  • ✔ Full Diagnostic Capability & Same-Day Repairs

  • ✔ DOT-Compliant Solutions

  • ✔ Support for Fleets & Owner-Operators

  • ✔ Trusted Since 2008

📞 Call (253) 691-6645 to schedule an air system diagnostic or repair, or request service online at www.STTRWA.com.
No leaks. No lag. Just clean, safe, dependable air system performance—from STTR.

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