Brake failures are the number one cause of commercial truck out-of-service violations at DOT inspections — and for good reason. A commercial truck with compromised brakes is a serious safety risk. Interstate Fleet Services provides complete brake system service for commercial trucks in Rock Hill, SC and throughout the Carolinas. We service all brake system components, perform DOT-compliant brake adjustments, and fix what we find so your truck rolls safely and passes inspections.
Call Now: (803) 329-9755Complete air system inspection including compressor output, air dryer function, glad hands, air lines, pressure gauges, and safety valves. We find air leaks and fix them.
Automatic and manual brake adjustment for all axle configurations. Brake adjustment is the most commonly cited brake violation — we check and adjust at every service.
Service brake chambers, spring brake chambers (piggybacks), and hold-off chambers. We replace failed or damaged chambers and verify proper operation.
Brake drum inspection, turning, and replacement. Brake shoe inspection and replacement. Cam shaft and cam bushing service. Complete drum brake overhaul.
Air disc brake caliper service, rotor inspection and replacement, and pad replacement for trucks equipped with disc brake systems.
ABS sensor replacement, tone ring inspection, ABS modulator service, and ABS controller diagnostics. ABS faults trigger inspection violations on both trucks and trailers.
Automatic slack adjuster inspection, lubrication, and replacement. A seized or failed slack adjuster is a common cause of brake adjustment violations.
Glad hand seal replacement, air line fitting repair, and supply/service line replacement. Air system integrity is fundamental to brake function.
Spring brake inspection and service, parking brake control valve service, and parking brake application testing.
Commercial truck brakes operate under extreme conditions — repeated heavy applications on loaded vehicles, temperature cycling from cold starts to highway running, and exposure to road debris, moisture, and salt. Unlike a car where worn brakes mean a bad inspection, worn commercial truck brakes can mean a catastrophic accident. The stopping distances involved with a loaded 80,000-pound truck make brake performance critical.
For fleet operators, brake maintenance also directly impacts your CSA Safety Measurement System score. Brake violations are among the highest-point violations in the FMCSA safety scoring system. A pattern of brake violations in roadside inspections triggers enforcement attention and can affect your operating authority. Proactive brake maintenance is both a safety and compliance investment.
Schedule Brake Service: (803) 329-9755Common signs include: increased stopping distance, brake warning lights or buzzer, pulling to one side when braking, grinding or squealing noises, low air pressure warnings, soft or spongy brake pedal, and visible brake dust or scoring on drums. Any of these warrant immediate inspection.
Common out-of-service brake violations include: brake adjustment (slack adjuster travel beyond limits), cracked or damaged brake chambers, missing brake components, air leaks in the system, and inoperative ABS on required vehicles. We fix these before you face an inspector.
Yes. We dispatch mobile service for many brake repairs including brake adjustments, air line repairs, glad hand replacements, and brake chamber replacements. Call (803) 329-9755 and describe the issue — we'll tell you if it's a mobile or shop job.
Commercial truck brakes should be inspected at every PM service interval (typically every 15,000–25,000 miles) and before any long haul. Brake adjustment is particularly important as brakes can go out of adjustment from normal heat cycling and wear between service intervals.
Yes. We diagnose and repair ABS faults on commercial trucks and trailers including sensor replacements, modulator valve service, and ABS controller issues. ABS faults that illuminate the dashboard indicator are a DOT inspection concern.
Inspection + repair in one visit. We find it, we fix it. Call to schedule.
(803) 329-9755