(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: ------------------------------------------------------------------------
Maximum
piston
Type of wheel brake travel (in
inches)------------------------------------------------------------------------Cam Type Driving Wheel Brake............................... 3\1/2\Other forms of Driving Wheel Brake......................... 6Engine Truck Brake......................................... 8Tender Brake............................................... 9------------------------------------------------------------------------