TM 10-6640-216-13&P
2-2. OPERATOR CONTROLS AND INDICATORS - continued.
Table 2-4. Interior - Roadside Wall and Countertop Controls, and Indicators - (Cont)
Control or Indicator
Function
VAC-AIR Switch (S4)
Provides power to vacuum-air pressure pump.
(with neon light)
Built-in neon lamp on switch illuminates
when switch placed in the on position.
WATER PUMP Switch (S5)
Provides power to water pump.
(with neon light)
Built-in neon lamp on switch illuminates
when switch placed in the on position.
d.
Interior - Vacuum Air Pressure System Controls and Indicators (Cabinet No. 9). Figure
2-5 and Table 2-5 list the controls and indicators of the vacuum-air pressure system located in
cabinet No. 9.
Table 2-5. Interior - Vacuum Air Pressure System Controls and Indicators
Control or Indicator
Function
Manometer Air Pressure Regulator
Regulates air pressure level to manometer for
RVP gage testing. Manually adjusted
according to ASTM Test D-323.
Air Pressure Regulator
Provides manual adjustment of vacuum-air
pressure pump discharge air pressure. Set at
18 psi (1.26 kg/cm2).
Air Pressure Gage
Vacuum Regulator
Vacuum Gage
Mounted on discharge side of vacuum-air
pressure pump. Provides indication of pump
output pressure. Graduated from 0 to 100 psi
(0 to 7 kg/cm2).
Provides manual adjustment of vacuum
created by vacuum-air pressure pump.
Vacuum level is adjusted according to ASTM
Test being performed and specifications of fuel
under test.
Mounted on inlet side of vacuum-air pressure
pump. Provides indication of pump vacuum.
Graduated from 0 to 30 in. Hg (0 to 760 mm
Hg).
2-9
