Three-column daily commercial vehicle inspection. Lists the systems and components that must be inspected, with their corresponding minor and major defect criteria.
Tap any part to expand the defect criteria. Minor defects require repair; major defects place the vehicle out of service.
Cargo securement rules, required emergency equipment, vehicle documentation, and brake stroke limits.
An insecure load is defined as cargo that can leak, spill, blow, fall from or through, or become dislodged or shift upon or within the vehicle. Failure to properly secure your load could result in demerit points, CVOR points and/or fines to the driver.
Maximum push-rod travel by chamber type. Bold rows indicate the most common chambers.
| Chamber | Diameter (in) | Max Travel (in) |
|---|---|---|
| 6 | 4-1/2 | 1-1/4 |
| 9 | 5-1/2 | 1-3/8 |
| 12 | 5-11/16 | 1-3/8 |
| 16 | 6-3/8 | 1-3/4 |
| 16L | 6-3/8 | 2.0 |
| 20 | 6-25/32 | 1-3/4 |
| 20L | 6-25/32 | 2.0 |
| 24 | 7-7/32 | 1-3/4 |
| 24L | 7-7/32 | 2.0 |
| 30 | 8-3/32 | 2.0 |
| 30L | 8-3/32 | 2.5 |
| 36 | 9 | 2-1/4 |
Six standard tests for air brake-equipped vehicles. Specifications shown in amber chips.
Warning light and buzzer must activate before air pressure drops below 55 psi. Spring brake must engage between 20 and 45 psi.
Time the air pressure build from 85 psi to 100 psi. Must build in less than 2 minutes — otherwise defective.
Cut-in must occur at 80 psi or above — 80 psi is the lowest it can cut in or it's defective. Cut-out must occur between 100 and 145 psi — must cut out by 145 psi.
With air pressure at 90–100 psi, release parking/spring brake. Drop in pressure must not exceed 3 psi per minute.
Apply spring brake, place vehicle in drive, and attempt to move forward. If the vehicle moves — defective.
Slowly move the vehicle ahead and apply the service brakes. If the vehicle does not stop — brakes are defective.
Air tanks must be drained at the end of each day to prevent condensation, rust and ice build-up in the air lines.