## D. OIL SYSTEM 

The oil system for K-3 thru K-74 includes a 30-gallon oil storage tank below the deck of the car, and two 14-gallon oil service tanks, one in each engine na~elle, and a transfer pump with necessary fittings. 

In K-75 and future, the oil storage tank, transfer pump and fittings are removed and the oil service tanks in the nacelles are enlarged to the 26-gallon ’size. 

The oil is cooled by a radiator which is located in the nacelle for the K-3 thru K-8 airships, and which is suspended from the lower outriggers for the K-9 and sub› sequent ships. 

The service tanks are equipped with electrical heating units to heat the oil in cold weather. 

The amount of oil in the service tanks is read on two oil gages located on the mechanic’s panel. The amount of oil in the storage tanks is read directly on the tank through a trap door in the deck of the car. 

