Pre-Trip After a Shop Repairs the Steer Axle
After a shop replaces a steer tire and adjusts the brakes on a 2018 tractor, a driver performs a pre-trip inspection before a 300-mile run. He finds steering wheel free play of about 30 degrees; left steer tire tread at 5/32 inch; right steer tire tread at 4/32 inch; a cut in the right steer tire sidewall deep enough to expose cord; trailer brake pushrod travel of 2.5 inches on a type 30 chamber; an air pressure loss of 4 psi per minute with the engine off and the brakes released; and a brake light that stays on. The shop is closed. The terminal is 12 miles away on a two-lane road, and the nearest certified repair shop is 40 miles away. The driver wants to drive to the terminal and fix the problems Monday.
1. Which findings are out-of-service defects, and why?
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Several findings are out of service. Steering wheel free play of 30 degrees exceeds the 10-degree limit, so steering control is not assured. The right steer tire cut exposes cord, which is an automatic out-of-service tire defect; the 4/32-inch tread is at the minimum but does not cure the cut. The left steer tire at 5/32 inch is legal. Trailer pushrod travel of 2.5 inches exceeds the 2-inch adjustment limit for a type 30 chamber, so the brake is out of adjustment. An air loss of 4 psi per minute with brakes released exceeds the 3 psi-per-minute limit for a combination vehicle.
The brake light staying on is a defect that needs repair, though it is not the main reason the vehicle is out of service. The combination of steering, tire, brake adjustment, and air-loss defects makes the tractor-trailer unsafe to drive.
2. Can the driver legally drive the 12 miles to the terminal? Explain.
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No. Multiple out-of-service defects are present, and a short trip does not make them legal or safe. The steering free play and the exposed-cord steer tire affect control; the misadjusted trailer brake and the air leak affect stopping. Driving 12 miles on a two-lane road with those defects risks a crash and a roadside inspection violation.
The shop being closed does not authorize a temporary repair or a 'nurse it home' trip. The driver should call roadside service or arrange a tow to a certified repair facility. The carrier should be notified. If the tractor can be separated from the trailer, that decision still requires the tractor to be repaired or towed; the trailer brake defect also keeps the combination out of service.
3. What should the driver document, and what should be rechecked after repairs?
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Document the inspection findings, photos of the tire cut and pushrod, the air-loss test, and the brake-light condition. Complete the driver vehicle inspection report, note that the vehicle was placed out of service, and keep the repair order. Notify the carrier in writing if required by company policy.
After repairs, recheck everything before moving: steering free play within 10 degrees, correct tire condition and tread, pushrod travel within the limit for the chamber type, and an air-leak test within the allowable rate. Perform a brake test, confirm the brake lights work correctly, and check that the repair did not disturb air lines or wheel hardware. Do not accept a repair order alone; verify the condition yourself.