Defective rail car truck

Roller bearing axle wear limits.

Figure A-18. Roller bearing age.

Table A-3. Roller bearing axle wear limits.

REJECT WHEN LESS THAN

Journal Size

Wheel Seat

Standard

Black Collar

Raised

Axle Center

4 x 8"

6 1/16"

4 11/16"

5 x 9"

6 1/4"

5 x 10"

7 3/16"

6 x 11"

7 3/8"

7 7/8"

6 5/16"

6 x 12"

7 7/8"

8 3/8"

7 x 12"

........

9 "

7 7/8"

Defective rail car truck.

a. A rail car truck shall be repaired before placing or continuing in service if a side frame

has any of the following defects:

(1) A side frame or bolster that is broken or has a crack of inch or more in the

transverse direction on a tension member, is bent, is patched, or is the wrong size.

(2) A side frame is worn or corroded more than 25% in any section of the side frame,

except brake hanger bracket, journal box or column guide on which any section should not be

reduced below 40% of the original section. See Table A-4 for wear limits.

A - 19