aircraft. The HHT can refuel aircraft at rates of 1200-GPM through both hydrant and servicing hoses or 600
GPM through any one set.
(6) HSV-12 Hydrant Servicing Vehicle.
(a) The HSV is also self-propelled and has many of the same features as the HHT.
(b) The HSV was primarily designed to refuel wide-bodied aircraft such as the KC-10 and B-1B.
It has a highlift capability to facilitate underwing refueling operations.
(c) The HSV connects to the hydrant system using a 35-foot long 4-inch hose. It services aircraft
through two 60-foot long 3-inch hoses with SPR nozzles. There is also an 8-inch lift platform hose to connect the
lift platform to the system.
(d) The HSV can refuel aircraft through any one hose at a rate of 1200 GPM and defuel at 300
(e) The hydrant servicing vehicle can be used with Type I, II, and III hydrant system, but can
only conduct cold refueling or defueling operations and cannot be used in concurrent servicing operations.
(7) GRU-17 Pantograph (Aircraft Field Servicing Unit).
(a) The pantograph can be used with any fuel servicing system that conducts hot refueling.
(b) The pantograph contains the basic valves, pressure regulating gages, and grounding reels
needed for refueling operations.
(c) The basic pantograph deign is made of four sections of aluminum pipe connected with sealed
swivel joints. The joints allow the pantograph to be positioned to refuel the aircraft. The end of the pantograph
has a hose section with an SPR nozzle.
(d) Fuel flow is regulated using a hand actuated valve or "deadman switch."
d. Fuels Mobility Equipment.
(1) R-14 Air Transportable Hydrant Refueling System.
(a) This is the most common type of portable hydrant system used in the Air Force.
(b) It is air-transportable and can be set up in a matter of hours.
(c) The complete system consists of three identical and self-sufficient modules.