from John Parsons
Greetings from the west, I just thought that I would submit this little lesson (which occurred twice before I learned it) for possible submission in the newsletter -
When installing an electric fan on series trucks to replace the original fan it would be advisable to fabricate a stiffening plate that would bolt onto the front of the pulley to replace the original fan. Without this it is possible for the nose of the pulley (which is really quite thin) to flex during normal operation which over time will cause it to fail rendering you without ancillaries, a water pump and possibly a radiator if the pulley decides to go through it. I have witnessed this type of failure twice now, on a race car and on my Land Rover.
Reprinted from the OVLR Newsletter, January, 1998