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Mobile Diesel USA
Services
Phoenix dispatch, 7 AM to 7 PM Arizona time

Brakes and air systems

Complete brake and air system service for commercial vehicles — dispatched to your yard, truck stop, or roadside location.

Get help nowCall (602) 456-9071

How it works

Describe the issueTell us what's happening — soft pedal, air loss, ABS light, dragging brake, or DOT inspection failure. Include your vehicle info.
Mechanic dispatchedWe send a brake specialist to your location with the tools, parts, and equipment for your specific brake system.
Inspect and quoteYour mechanic inspects the full brake system, measures components, and provides a detailed quote before starting work.
Repaired and compliantBrakes are repaired, adjusted to spec, and road tested. You get documentation of the work performed.

Brakes are non-negotiable. Neither is downtime.

Out-of-adjustment brakes and air leaks are a common reason trucks get put out of service at roadside inspections. Our mobile mechanics perform full brake jobs, air system repairs, and adjustment on-site — keeping you compliant and on the road.

  • Brake shoe and pad replacement

    Complete friction replacement including shoes, pads, drums, and rotors for S-cam, disc, and wedge brake systems on all axle positions.

  • Air brake system repair

    Air compressor service, air dryer maintenance, air tank repair, and line replacement to keep your air system at full pressure.

  • Brake chamber service

    Spring brake chamber replacement, service chamber repair, slack adjuster replacement, and pushrod adjustment for proper brake stroke.

  • ABS diagnostics

    ABS fault code reading, wheel speed sensor replacement, modulator valve service, and ABS lamp troubleshooting.

  • Air leak detection

    Systematic air leak testing across the entire brake system — fittings, valves, lines, chambers, and glad hands — to eliminate pressure loss.

  • Brake adjustment and inspection

    Full brake adjustment to FMCSA standards, free stroke measurement, and pre-DOT brake inspection to keep you compliant.

Questions

No estimates. The mechanic diagnoses, quotes, and you approve before any work.

Yes. Our mechanics perform complete brake jobs in the field including shoe/pad replacement, drum turning or replacement, chamber service, slack adjuster replacement, and final adjustment. No need to tow to a shop.

Yes. A mechanic can come to where the truck is parked, diagnose the violation, quote the repair and fix it on-site once you approve.

Common signs include soft brake pedal, longer stopping distance, air system leaks (hissing), ABS warning light, brake drag or pull, and visible wear at the drum opening. If your pushrod stroke exceeds the adjustment limit, your brakes need immediate attention.

Yes. Our mechanics are experienced with both S-cam drum brakes and air disc brakes from all major manufacturers including Bendix, Meritor, Haldex, and Knorr-Bremse.

In the app or on your secure status page, by card, after you approve the price. Nobody should ask you for cash at the truck.

The Phoenix, Arizona metro, 7 AM to 7 PM Arizona time, every day. Chicago and Detroit are launching next and are not available yet. If anyone is in danger, call 911.

Need this fixed in Phoenix?

Tell dispatch where the truck is and what it's doing. If anyone is in danger, call 911.

Get help nowCall (602) 456-9071