TM 9-491O-623-14&P
The gage valve (4) permits the pressure gage (5) to meas-
Gage Valve.
b.
To apply pressure to
ure the pressure being delivered to devices under test.
a device without overloading the pressure gage, the valve should be turned
This protects the gage from hydraulic shock. When
clockwise until it seats.
measuring pressure, the valve must be turned counterclockwise one turn off its
To release the pressure, turn valve counterclockwise until pressure
seat.
reads 0 on the pressure gage.
8. Measuring Devices and Other Components (Fig 2).
Pressure Gage.
a.
The pressure gage (5) is used to check delivery pres-
sure of fuel injector nozzles and to monitor pressure drop while performing
The gage range is 0 to 5000 psi in increments of 50 psi.
leakage test.
b.
Handle.
The pump handle (6), when operated in a pumping motion with
the pump valve (3) turned counterclockwise two or three turns allows fluid to
be delivered under pressure to device under test.
Filler Plug.
The filler plug (1) has to be removed so that the reser-
c.
voir can be filled with calibration fluid.
Filler plug must be left loose
while the tester is in operation to allow
air to enter the fluid reservoir.
Discharge Connection.
Fluid is disposed from this connection (2)
d.
through proper connectors, tube assembly, etc, to the device under test.
General Procedures for Testing Fuel Injector Nozzles.
9.
WARNING
Before-using the tester, the
operator should be familiar with the
following
instructions.
The tester is capable of developing high
pressures.
Improper use can result in damage to the instrument or
injury to the operator.
