Fuel fuel dispenser common cheating methods are the following

a. Deliberately did not return to zero. Cheating will be transferred to the fuel dispenser automatic zeroing means critical state, no oil pressure at the gun or hand means straining hard to go back to zero, resulting in cumulative number of tables in front.
b. Adjust meter displacement adjusting device. Some gas stations on the displacement meter fuel dispenser adjustment cover lid seals unauthorized removal or pry loose the line drawn After adjustment, turn the wire through the clamp; and some of the lines to stay too long, seals do not need to move, you can adjust the displacement of the cover is removed, make adjustments, can reduce the amount of oil heavy duty fuel dispenser pay 1-5 percent.
c. Hand dial counter digital disc. Some gas stations will be counter glass and the inner surface of the bezel auto fuel dispenser unloaded, while the side facing the customer does not unload. When refueling, a person standing beside the fuel dispenser struck counter digital disc, struck tens refueling capacity, ranging from toggle to single digits.
d. Replace the bevel gear counter spindle. Various types of fuel dispenser, bevel gears its counter spindle geometry and modulus are not the same, usually 20 teeth, 25 teeth. Bevel gear after criminals will be replaced, a tooth for each additional, less paid customer 4-5 percent oil.