---
kind: "section"
citation: "49 C.F.R. § 229.55"
title: "49"
number: "229.55"
heading: "Piston travel."
url: "https://uscodex.org/cfr/49/229.55"
---

# §229.55. Piston travel.

- (a) Brake cylinder piston travel shall be sufficient to provide brake shoe clearance when the brakes are released.
- (b) When the brakes are applied on a standing locomotive, the brake cylinder piston travel may not exceed 1 1/2 inches less than the total possible piston travel. The total possible piston travel for each locomotive shall be entered on Form FRA F 6180-49A.
- (c) The minimum brake cylinder pressure shall be 30 pounds per square inch.

## Notes

### Authority

Authority: 49 U.S.C. 20103, 20107, 20133, 20137-38, 20143, 20168, 20701-03, 21301-02, 21304; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 45 FR 21109, Mar. 31, 1980, unless otherwise noted.