C.F.R. » Title 49 » CHAPTER II—FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION › PART 230—STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS › Subpart C—Steam Locomotives and Tenders

49 C.F.R. § 230.76

Piston travel

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(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:

Type of wheel brakeMaximum piston travel (in inches)
Cam Type Driving Wheel Brake31⁄2
Other forms of Driving Wheel Brake6
Engine Truck Brake8
Tender Brake9