TM 10-6640-216-13&P
2-12. OPERATING PROCEDURES - continued.
(d)
(e)
(f)
(g)
(h)
(i)
Check that faucet is turned off.
Place the suction/tank gate valve to the close position.
Place the suction/pump gate valve to the open position.
Place pump switch in the on position. Pump should run until water
pressure reaches cutoff point (20 psi).
Open sink faucet to purge air from system. Pump will start when water
pressure drops to starting point (10 psi).
When a solid stream of water flows from the faucet, close faucet and check
system for leaks.
c.
Vacuum-Air Pressure System Operation. The vacuum-air pressure system is housed in
cabinet No. 9. Refer to Figure 2-15.
(1)
Air Pressure System Operation.
(a)
(b)
(c)
(d)
(e)
(f)
(g)
(h)
(i)
(j)
Open air pressure stopcock and vacuum stopcock to release air pressure and
vacuum then close the air pressure stopcock.
Open door of cabinet No. 9 and open the drain stopcock for the air surge
tank and release all air pressure.
After all air is released from system close the air surge tank drain stopcock.
Verify that the manometer pressure regulator valve is closed.
Place VAC-AIR switch on.
Listen for any air leaks. Correct as necessary.
Observe air pressure gage on pump for 18 psi (1.3 kg/cm2) indication. If
pressure less than or greater than 18 psi, adjust pump air pressure
regulator. Turn knob to right to increase pressure: left to decrease
pressure.
Close cabinet door.
Open and close air pressure stopcock as needed.
Place VAC-AIR switch off after use.
(2)
RVP Gage Testing. The RVP gages must be tested for accuracy before and after
each vapor test of aviation fuel. The accuracy of the gages is verified by using the
manometer as a standard. To test RVP gage;
(a)
Open door of cabinet No. 9.
2-41
