Brake Proportioning/Combination Valve: Labor Times
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | 1.4 | 0.8 | B | |
| Pressure Metering Valve | 1.3 | 0.6 | B |
| Standard Hours | Manufacturer Warranty Hours | Skill Level | Notes | |
| Replace | 1.4 | 0.8 | B | |
| Pressure Metering Valve | 1.3 | 0.6 | B |