TM 10-4930-204-13Death or serious injury may occur if proper bonding procedures arenot followed. While using method 3, an object with a differentelectrical potential (any object that ‘is not ‘part of the bondedsystem) should not come into contact with the bonded equipmentwhen a flammable vapor-air mixture maybe present.3Method 3: When the climate, terrain, or tactical condition makes it impossible to secure asatisfactory ground rod, requirements to ground the fuel dispenser (system or refueler) may be waived;however, the requirement to bond the fuel dispenser to the aircraft/vehicle may not be waived underany circumstances. Method 3 relies on bonding alone. Bonding is made between the aircraft/vehicle and therefueling system or refueler along with the nozzle and the aircraft/vehicle. A contact between an unbendedobject and the system could produce a spark that could set off an explosion or fire. Method 3 procedures areauthorized by the commander of the unit one organizational level above the operating unit. This is the leastdesirable method since it involves bonding only.(3) Maintain a minimum distance of 25 feet (7.62 meters) between the vehicles being refueled.(4) Open only filler plug of tank being filled. Do not attempt to refuel two vehicles at the same timeunless the tank and pump unit operator has an assistant who can constantly monitor the second nozzle.(5) Open the hand valves on the sight glass assembly (fig. 2-1) and allow the sight glass to fill. if theglass does not fill, open the petcock on the lower valve to release the air. Close the petcock when the sightglass is full.(6) Check the sight glass for presence of water and drain when necessary.NOTEA petcock is located at the bottom of the left side of the filter/separator on Models 2938 and 36W50. A pipe plug drain is locatedin the same position on Models 2519 Style 1 Orr and SembowerModels and must be removed to drain water.(7) Attach the nozzle grounding cable clamp/bayonet connector to the vehicle to be refueled.(8) Normally, the pump will automatically prime itself when the tanks are full by means of gravity flow.(9) To prepare to start electric motor driven pumping assembly, connect intervehicular power cable,with adapter (if needed), to vehicle receptacle and junction box receptacle J2 (fig. 1-4.1). Then connectON-OFF switch cable to junction box receptacle J1.Do not remove the priming cap when the tanks are full to check forpump prime, as this will result in a fuel spill. Entrapped air will bereleased through the dispensing nozzle when the nozzle is initiallyopened at the beginning of the dispensing cycle.Check that all camlock couplings are closed before and duringpumping operations. Couplings’ opening because of vibration willresult in a fuel spill. Repair or replace defective couplings.b. Starting Procedures for Engine. Refer to figure 2-7 and start the engine in accordance with theprocedures.2-6Change 8
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