When your air brakes fail, you’re not just facing a breakdown—you’re facing a safety hazard and DOT violation. AZ Mobile Diesel Repair provides emergency mobile brake and air system repair across the Phoenix Metro area with 30-60 minute response times.
Our mobile technicians carry brake chambers, slack adjusters, air hoses, fittings, and diagnostic tools to handle most brake system failures on-site. From air leaks to seized chambers, wheel seal replacement to brake adjustments—we get your truck safe and legal to drive again, right where you’re parked.
What’s Included in Our Mobile Brake Service
Air Brake Chamber Replacement
Replace failed or leaking brake chambers (Type 30, 24, 20, 16)—standard and spring brake chambers
Slack Adjuster Service & Replacement
Manual and automatic slack adjuster replacement, adjustment, and lubrication
Air Leak Diagnosis & Repair
Find and fix air leaks in brake lines, fittings, valves, and air tanks
Wheel Seal Replacement
Replace leaking wheel seals to prevent brake contamination and bearing damage
DOT Brake Inspection & Adjustment
Measure brake stroke, adjust brakes to spec, and ensure DOT compliance
Brake Hose & Line Replacement
Replace cracked, damaged, or leaking brake hoses and air lines
✓ Your safety is our priority. We don’t cut corners on brake repairs—every job is tested and verified before you drive away.
Your Safety Is Our Priority
Brake failures are dangerous and can result in serious accidents, cargo damage, and costly DOT violations. Here’s why proper brake repair matters:
Prevent Accidents
Properly functioning brakes are essential for safe operation. Brake failures can lead to jackknifing, rollovers, and collisions.
Stay DOT Compliant
Out-of-adjustment brakes or failed components result in roadside violations, fines, and out-of-service orders.
Avoid Costly Damage
Ignoring brake issues leads to more expensive repairs: damaged drums, cracked S-cams, and wheel bearing failures.
Minimize Downtime
Mobile brake repairs mean we come to you—no towing, no shop appointments, no wasted time sitting at a repair facility.
Our Brake Repair Process
Here’s our proven 5-step air brake service process:
1
Initial Assessment
When you call (602) 456-9071, we ask about symptoms: brake warning light, air loss, stuck brakes, poor stopping power. Our technician arrives with common brake parts and diagnostic tools. ETA: 30-60 minutes.
2
Brake System Inspection
We perform a thorough brake inspection: check air pressure build-up, listen for air leaks, inspect chambers and slack adjusters, measure brake stroke, test spring brake function, and examine hoses/lines for damage.
3
Diagnosis & Quote
We identify the failed component(s) and explain what needs to be repaired or replaced. You’ll get a detailed quote covering parts and labor before we start work. No surprises.
4
On-Site Repair
We complete the repair at your location: replace chambers, adjust or replace slack adjusters, fix air leaks, replace hoses, install wheel seals. All work is done to manufacturer specs and DOT standards.
5
Post-Repair Testing
After repairs, we test the brake system: verify air pressure holds, check for leaks, test brake application/release, measure brake stroke again, and ensure spring brakes function properly. You don’t leave until we’re confident the system is safe.
Common Brake Issues We Fix
Our mobile brake technicians handle every type of air brake and foundation brake problem:
Failed Brake Chamber
Leaking diaphragms, seized push rods, or damaged spring brake chambers. We carry replacement chambers (Type 30, 24, 20) and can swap them roadside in under an hour.
Air Leak / Pressure Loss
Air system won’t build or hold pressure due to leaks in lines, fittings, valves, or reservoirs. We locate leaks using soapy water tests and replace damaged components.
Out-of-Adjustment Brakes
Excessive brake stroke (over 2” for Type 30 chambers) fails DOT inspection. We adjust manual slack adjusters or replace malfunctioning automatic slack adjusters.
Stuck or Dragging Brakes
Seized slack adjusters, frozen S-cams, or stuck brake chambers cause brakes to drag, overheat drums, and reduce fuel economy. We diagnose the cause and free or replace components.
Leaking Wheel Seal
Gear oil leaking onto brake shoes causes contamination, reduced braking power, and potential bearing failure. We replace wheel seals and clean brake components.
Broken or Cracked Brake Hose
Damaged air hoses cause catastrophic air loss and brake failure. We carry replacement hoses and fittings to restore your brake system immediately.
Spring Brake Won’t Release (Caged)
Spring brakes that won’t release due to low air pressure, damaged chamber, or seized mechanism. We diagnose the root cause and get your brakes functioning properly.
Air Compressor Issues
Compressor not building pressure due to worn rings, broken valves, or belt issues. We diagnose compressor faults and can perform minor repairs or recommend replacement.
Service Coverage Area
AZ Mobile Diesel Repair provides mobile brake service throughout the Phoenix Metro area and I-10/I-17 corridors:
Major Corridors
I-10 (Buckeye to Apache Junction)
I-17 (Anthem to South Phoenix)
Loop 101, Loop 202, Loop 303
Cities We Serve
Phoenix, Mesa, Chandler, Tempe, Scottsdale, Glendale, Tolleson, Avondale, Goodyear, Surprise, Buckeye, Peoria, Gilbert, and surrounding areas.
Brake emergency? Call us at (602) 456-9071 for immediate mobile brake service.
Why Choose AZ Mobile Diesel Repair for Brake Service
Fast Response
30-60 minute average response time across Phoenix Metro. Our mobile brake trucks are strategically positioned near I-10 and I-17 for rapid emergency response.
DOT-Compliant Repairs
All brake repairs meet FMCSA and DOT standards. We measure brake stroke to spec, test air systems thoroughly, and document all work for compliance records.
Parts In Stock
We carry common brake chambers (Type 30, 24, 20), slack adjusters, brake hoses, and air fittings on our trucks. Most repairs are completed same-day without waiting for parts delivery.
Get Emergency Brake Service Now
Brake Failure? We’re On Our Way.
Call now for mobile brake repairs. Average response time: 30-60 minutes.
(602) 456-9071
Open 7 AM - 7 PM Daily for emergency brake service across Phoenix Metro