49 CFR § 230.76
Piston travel
November 18, 2020
(a) Minimum piston travel. The minimum piston travel shall be sufficient to provide proper brake shoe clearance when the brakes are released.
(b) Maximum piston travel. The maximum piston travel when steam locomotive is standing shall be as follows:
Open Table
| Type of wheel brake | Maximum piston travel (in inches) |
|---|---|
| Cam Type Driving Wheel Brake | 31⁄2 |
| Other forms of Driving Wheel Brake | 6 |
| Engine Truck Brake | 8 |
| Tender Brake | 9 |
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