In order to determine the causes of hot boxes and to direct further research on the journal box assembly and truck details for improvement of plain journal bearing operation, a task force was authorized to make a field survey of hot boxes. Many of the undesirable conditions found in this study were of the type that design and material changes could avoid. It was determined that with a good journal lubricator, over a thousand miles could be run before all the free oil was wicked from the box. It was also found that generally 5,000 to 10,000 miles could be run without adding free oil before the bearing was in distress. These data suggest that changes in journal box, bearing, lubricator and other components should be made to eliminate the need for any servicing of these items at intermediate terminals. With the use of a reliable hot box detector to locate journal boxes operating above normal temperature, it appears that trains could be moved through terminals with minimum delay and the hot box set-outs between terminals greatly reduced.

  • Supplemental Notes:
    • Only 2 pp of total report available
  • Corporate Authors:

    Association of American Railroads

    50 F Street, NW
    Washington, DC  United States  20001-1564
  • Publication Date: 1959-12

Media Info

  • Pagination: 2 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00040335
  • Record Type: Publication
  • Report/Paper Numbers: AAR MR-375 Res Rpt
  • Files: TRIS
  • Created Date: Jul 8 1994 12:00AM