DIVISION 3 HEADS-UP 7/24/05
DIRECTIONAL / RETAINING PIN ON FOUR-WAY VALVE
The Water Flow Directional Indicator on the 4" Four-Way Valve visually indicates the direction of water flow.
However, the directional indicator (steel pin with yellow rubber cap) also serves as a retaining pin for the internal gear system that provides mechanical advantage during valve operation.
The Water Flow Directional Indicator on the 4" Four-Way Valve visually indicates the direction of water flow.
However, the directional indicator (steel pin with yellow rubber cap) also serves as a retaining pin for the internal gear system that provides mechanical advantage during valve operation.
On July 24, 2005, a directional indicator/retaining pin fell out of a Four-Way Valve during a training exercise and rendered the Four-Way Valve inoperative.
The exact cause as to why the pin worked loose is unknown. The pin may have been installed incorrectly or vibrated loose during vehicle operation (unsure). The Supply and Maintenance Division, Equipment Engineering Unit has been notified.
All Engineers need to inspect all Four-Way Valves to ensure that water-flow directional / retaining pins are solidly seated by physically pulling on the pin with your hand. (Do not use tools) Please notify the Equipment Engineering Unit (485-6106) of any problems you may encounter.
Be safe out there!
