The Gammon GTP-9192 is to be mounted on a firm surface such as a work bench or a wall. The technician then places the nozzle face against the gauge and attempts to rotate the nozzle as if making a connection to a 3-lug fueling adapter. If the nozzle will rotate, the wear is excessive. If the nozzle will not rotate, the wear is within suggested limits.

NOTE: When a connector is found to be worn, order the replacement 2662319. Whittaker also offers connectors that have stainless steel inserts at the 3 critical wear points. Order part number 2682020. In fact, Whittaker nozzles can be ordered with that special connector by specifying option J.