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Air Brake System — Practice Defect Checklist
Presented by the APTA Brake Task Force Committee · Hosted by Fraser Gauge, Detroit
Team / Competitor: ___________________________
Date: ___________________________
Practice Session #: ___________
| # | Component / System | Defect Found / Location | Correct? ✓ |
|---|---|---|---|
| 01 | Tu-Flo 700 Air Compressor | □ | |
| 02 | D-2 Air Governor (cutout: 120 PSI) | □ | |
| 03 | AD-9 Air Dryer with 175 PSI ST-3 safety valve | □ | |
| 04 | Puraguard oil separator (post air dryer) | □ | |
| 05 | E-6 Brake application valve | □ | |
| 06 | R-12DC Service brake relay valve (crack pressure: 5.5 PSI) | □ | |
| 07 | R-14 Spring brake relay valve (crack pressure: 4.0 PSI) | □ | |
| 08 | QR-1 Front service brake valve (crack pressure: 0 PSI) | □ | |
| 09 | SR-1 Spring brake modulation valve | □ | |
| 10 | SL-5 Stop light switches (activate at 5 PSI) | □ | |
| 11 | LP-3 Low-pressure switches (rated at 70 PSI) | □ | |
| 12 | RV-1 Interlock pressure regulator (adjusted to 45 PSI) | □ | |
| 13 | PR-3 Pressure protection valve (opens at 92–98 PSI) | □ | |
| 14 | PP-1 Control valve (application pressure: 40 PSI) | □ | |
| 15 | RD-3 Spring brake emergency release valve | □ | |
| 16 | Duplex instrument panel air pressure gauge (green = Primary, red = Secondary) | □ | |
| 17 | ST-3 Safety valve (150 PSI) | □ | |
| 18 | SC-3 Single check valves | □ | |
| 19 | DC-4 Double check valves | □ | |
| 20 | WABCO open-style modulator valves | □ | |
| 21 | SAB automatic slack adjusters | □ | |
| 22 | Type-20 front service brake chambers | □ | |
| 23 | Type-24 Service/Spring brake chambers | □ | |
| Total Defects Found: _______ / 6 planted defects | Time Used: _______ min | Score: _____ | |
| Item | Points |
|---|---|
| Total possible points | 350 |
| Part I — Electrical/Pneumatics diagnosis | 50 pts |
| Part II — Each of 6 planted defects found | 50 pts each |
| Penalty: Misuse of diagnostic/test equipment | −10 pts |
| Penalty: Safety violation incident | −10 pts |
| Penalty: ABS board not returned to original status | −10 pts |
| Tiebreaker: Fastest time wins | — |
Air Brake System — Practice Defect Checklist
Presented by the APTA Brake Task Force Committee · Hosted by Fraser Gauge, Detroit
Team / Competitor: ___________________________
Date: ___________________________
Practice Session #: ___________
| # | Component / System | Defect Found / Location | Correct? ✓ |
|---|---|---|---|
| 01 | Tu-Flo 700 Air Compressor | □ | |
| 02 | D-2 Air Governor (cutout: 120 PSI) | □ | |
| 03 | AD-9 Air Dryer with 175 PSI ST-3 safety valve | □ | |
| 04 | Puraguard oil separator (post air dryer) | □ | |
| 05 | E-6 Brake application valve | □ | |
| 06 | R-12DC Service brake relay valve (crack pressure: 5.5 PSI) | □ | |
| 07 | R-14 Spring brake relay valve (crack pressure: 4.0 PSI) | □ | |
| 08 | QR-1 Front service brake valve (crack pressure: 0 PSI) | □ | |
| 09 | SR-1 Spring brake modulation valve | □ | |
| 10 | SL-5 Stop light switches (activate at 5 PSI) | □ | |
| 11 | LP-3 Low-pressure switches (rated at 70 PSI) | □ | |
| 12 | RV-1 Interlock pressure regulator (adjusted to 45 PSI) | □ | |
| 13 | PR-3 Pressure protection valve (opens at 92–98 PSI) | □ | |
| 14 | PP-1 Control valve (application pressure: 40 PSI) | □ | |
| 15 | RD-3 Spring brake emergency release valve | □ | |
| 16 | Duplex instrument panel air pressure gauge (green = Primary, red = Secondary) | □ | |
| 17 | ST-3 Safety valve (150 PSI) | □ | |
| 18 | SC-3 Single check valves | □ | |
| 19 | DC-4 Double check valves | □ | |
| 20 | WABCO open-style modulator valves | □ | |
| 21 | SAB automatic slack adjusters | □ | |
| 22 | Type-20 front service brake chambers | □ | |
| 23 | Type-24 Service/Spring brake chambers | □ | |
| Total Defects Found: _______ / 6 planted defects | Time Used: _______ min | Score: _____ | |
| Item | Points |
|---|---|
| Total possible points | 350 |
| Part I — Electrical/Pneumatics diagnosis | 50 pts |
| Part II — Each of 6 planted defects found | 50 pts each |
| Penalty: Misuse of diagnostic/test equipment | −10 pts |
| Penalty: Safety violation incident | −10 pts |
| Penalty: ABS board not returned to original status | −10 pts |
| Tiebreaker: Fastest time wins | — |