Page 5-2 MDE-5422B Latitude™ Owner’s Manual · March 2021
Latitude Operation Working Principle
Self-contained Pump
The following steps describe the functioning of a self-contained pump:
1 Fuel enters through the pump inlet pipe passing through a strainer.
2 If the pressure is too high, the fuel flows through a bypass valve and recirculates.
3 The pump has an air separation system. Air-separated fuel flows back to the pump.
4 Air-free fuel flows out of the pump discharge line and through a filter.
5 The meter measures fuel flow.
6 On single and dual two-product units, fuel flows through a solenoid valve.
Note: Dual one-product units use two solenoid
valves in parallel.
7 Fuel discharges through the nozzle.
Handling the Nozzle
This section provides information about handling the nozzle when fueling and placing it back
in to the nozzle.
• Before Fueling
To handle the nozzle when the user is about to start fueling, proceed as follows:
1 Lift the nozzle to clear the padlock support.
Figure 5-2: Clearing Padlock Support
2 Tilt the nozzle as shown in the following figure:
Figure 5-3: Tilting Nozzle