SP C-630 page: Yard Slug Rebuilding
Heavy Switcher Renumbering:
In mid 1973, the SP began a program to rebuild two C-628 and one C-630 unit as heavy yard slugs to work between pairs of SD38-2's at West Colton yard in southern California.
| Hump Slug number | original number |
| SP 1002 | SP 7811 |