---
kind: "section"
citation: "49 C.F.R. § 230.98"
title: "49"
number: "230.98"
heading: "Driving, trailing, and engine truck axles."
url: "https://uscodex.org/cfr/49/230.98"
---

# §230.98. Driving, trailing, and engine truck axles.

- (a) **Condemning defects.** Driving, trailing, and engine truck axles with any of the following defects shall be removed from service immediately and repaired (see appendix A of this part for inspection requirements):
  - (1) Bent axle;
  - (2) Cut journals that cannot be made to run cool without turning;
  - (3) Transverse seams in iron or steel axles;
  - (4) Seams in axles causing journals to run hot;
  - (5) Axles that are unsafe on account of usage, accident or derailment;
  - (6) Any axle worn 1/2 inch or more in diameter below the original/new journal diameter, except as provided in [paragraph (a)(7)](#a-7) of this section;
  - (7) Any driving axles other than main driving axles with an original or new diameter greater than 6 inches that are worn 3/4 inch or more in diameter below the original/new diameter.
- (b) **Journal diameter stamped.** For steam locomotives with plain bearings, the original/new journal diameter shall be stamped on one end of the axle no later than January 18, 2005.

## Notes

### Authority

Authority: 49 U.S.C. 20103, 20107, 20702; 28 U.S.C. 2461 note; and 49 CFR 1.89.

### Source

Source: 64 FR 62865, Nov. 17, 1999, unless otherwise noted.