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1720-DS Fuel Nozzle

1720-DS Fuel Nozzle

SNYDER II Diesel Locomotive Automatic Fueling System

Featuring the Snyder 1720-DS Fuel Nozzle

The Snyder II Automatic Fueling System works on a vacuum principle. The system consists of a Snyder 1720-DS Automatic Nozzle and N2000-TA Fuel Tank Adapter Vent Assembly (D and E).

When the automatic nozzle lever (A) is opened, diesel fuel flows through the nozzle and across an internal venturi (C) where a vacuum is created. Diesel fuel flowing into the fuel tank fill adapter (E) draws air from the locomotive fuel tank through the vent line (D) and into the tank adapter (E). Air is then circulated through the internal vacuum tube of the nozzle spout reaching the venturi (C) to satisfy the vacuum, thereby keeping the nozzle open.

As the level of diesel fuel rises in the fuel tank, it will cover the tip (G) of the fuel tank vent line stopping the entry of air into the tank adapter (E). With the absence of air to satisfy the vacuum at the venturi (C), the vacuum activates the automatic shut-off mechanism (H) which releases the operating lever (A) and closes the nozzle.


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