1-15. FUEL LOADING/UNLOADING SYSTEM (Con't).
The semitrailer may be bottom loaded through either piping assembly front port or
rear inlet at a maximum rate of 600 gpm (2271 Ipm). Top loading at a maximum rate
of 600 gpm (2271 Ipm) is through the manhole fill cover. Fuel is unloaded by gravity
discharge, or with the assistance of a 350-600 gpm (1325-2271 Ipm) pump, through
piping assembly front port ONLY.
(3) Transfer hoses, stowed in curbside stowage tube, may be connected to provide
additional length of hose for fuel loading or unloading.
A precheck system. with controls in the roadside cabinet, functions to predict failure
of automatic shut-off device (jet level sensor) during bottom loading.
b. MAJOR COMPONENTS AND THEIR FUNCTION.
A welded assembly that runs from emergency valve on underside
of semitrailer to a roadside front port and rear inlet.
Welded to piping assembly. Provides a tap for precheck tubing.
Set in a closed position when loading. Manually opened to allow fuel
to leave tank when unloading. Emergency valve is operated by
means of a control lever in cabinet or by two remote trip-releases
(front roadside or top curbside).
Contains emergency valve and vapor vent control levers; precheck
controls; storage for two grounding cable reels; transfer hose
reducers; and Basic Issue Items (Bll).