Where are the two sight glasses for the Engine-Mounted Fuel Filters (EMD) located?

Where are the two sight glasses for the Engine-Mounted Fuel Filters (EMD) located?

• A. On top of the engine-mounted fuel filter assembly.
• B. Inside the fuel tank.
• C. Near the radiator.
• D. On the left-hand side of the engine.

Answer: (A)

The sight glasses are placed on top of the engine-mounted fuel filter housing so you can easily view the fuel as it passes through the filter stages. This top position allows quick visual checks for water or air in the fuel and lets you confirm the filter is properly filled after priming, without disassembling anything. In a dual-filter setup, having both sight glasses on the top ensures you can monitor each side without having to remove components. Being located above the filter assembly also keeps the view unobstructed by hoses or the radiator and aligns with the filter’s normal flow path for straightforward inspection.

The sight glasses are placed on top of the engine-mounted fuel filter housing so you can easily view the fuel as it passes through the filter stages. This top position allows quick visual checks for water or air in the fuel and lets you confirm the filter is properly filled after priming, without disassembling anything. In a dual-filter setup, having both sight glasses on the top ensures you can monitor each side without having to remove components. Being located above the filter assembly also keeps the view unobstructed by hoses or the radiator and aligns with the filter’s normal flow path for straightforward inspection.