To specify a tank adpator kit, choose the number of adaptors (one side or both sides of the locomotive), the length of vent hose, the style of adaptor (N2000-TA or EVO), and any special requirements (rollover kits, mounting templates, or bushings).  Contact Snyder for any questions involving the proper kit for your application.

The video on the upper section of this page and this brochure (TAD-BRC-1052) illustrate the proper procedure. Be sure that the flapper hinge is oriented between the 11 o-clock and 1 o’clock position.

A 766-AR tool is used to install or remove Snyder tank adaptors. They make it easier to provide the proper installation torque and verify that the tank adaptor is properly clocked (with the flapper hinge between the 11 o-clock and 1 o’clock position). See our brochure (TAD-BRC-1052) for details.

Tank adaptors should be torqued to anywheree between 150-450 ft-lb. We recommend staying toward the upper end of the torque range. The range allows the tank adaptor to be clocked properly with minimal adjustment.

The flapper hinge on the tank adaptor must be installed between the 11 o-clock and 1 o’clock position. Otherwise, fuel can splash back off of the hinge and into the vent hole in the nozzle, potentially causing the automatic shutoff to fail. Proper tank adaptor clocking also places the vent hose port in the correct position to prevent trapping fuel.

Snyder recommends that tank adaptors be included on a regular replacement program. Adaptors should also be inspected on a regular basis and replaced when the outer face of the adaptor shows excessive wear. Chips and deep scratches in the sealing surface can cause insufficient sealing with the nozzle during fueling operations, potentially causing the automatic shutoff to fail.

Install the AR tool and use the same general procedure as installation, applying the wrench in the opposite direction.

Install the non-swivel end into the fuel tank. Route the vent hose in a way that prevents dips and areas where the hose can trap fuel, and install the swivel end of the hose into the tank adaptor.

NOTE: The vent hose must be between the 9 o-clock and 3 o’clock position on the tank adaptor. If it is not, the tank adaptor should be adjusted to the proper position prior to vent hose installation.

Snyder recommends replacing vent hoses every two years. During that time, vent hoses should be checked regularly for leaks and proper installation. A degraded vent hose can allow air to seep into the nozzle after the tank is full, causing the automatic shutoff to fail. An improperly installed vent hose can cause air restrictions that cause the nozzle to shut off prematurely.

Rollover kits prevent fuel spills from the vent hose in case of locomotive derailment that cause a rollover. They contain a stainless ball bearing that plugs the vent hose opening. See the vent hose brochure (TAD-BRC-1012) for further information.

The table in the vent hose section covers vent hoses for common locomotives. If you have a different style of locomotive or want to verify the length, lay the hose out straight and measure the distance between the ends of the fitting threads. Contact Snyder if you have a non-standard length.

CAUTION: Do not order a longer hose the the locomotive requires. Hoses that are too long can trap fuel in a bend and cause the nozzle to shut off prematurely.

Snyder vent hoses have special fittings to retain a 5/8” diameter through the entire length of fitting and hose. This provides the correct amount of air that the nozzle requires to operate properly. Using alternate hoses, bushings, street els, or other fittings that reduce the airflow can cause nozzles to shut off prematurely.