TM 55-4920-394-13&P
Table 2-1. Controls and Instruments
CONTROL OR INSTRUMENT
DESCRIPTION AND
FUNCTION OR
LOCATION
OPERATION
FAN SWITCH
Off-On toggle type on
Starts fan motor on
panel
cooler
FLOW CONTROL valve
Plug type throttling
Control flow of
valve on main control
fluid to test stand
panel
outlets.
Fluid sampling valves
Needle valve on panel
Permit taking sample
of pressurized fluid
at output if desired.
FLUID BYPASS valve
Plug type throttling
Bypasses fluid from
valve on main control
pressure outlet to
panel
suction return line.
HIGH PRESSURE TEST
Test connection on panel
External calibration
on high pressure
gauge.
HIGH PRESSURE GAUGE
Needle type on panel
Isolates fluid pres-
SHUT OFF valve
sure gauge from
system outlets for
positive reading and
external calibration.
HIGH PRESSURE RELIEF
Adjustable pilot-
Selects pressure at
valve
operated type with lock
which high pressure
nut on panel
fluid is
bypassed to
suction return line.
RESERVOIR SELECTOR
Handle at top of control
Selects test stand
panel
or ship reservoir.
VOLUME CONTROL
Manual control with lock
Regulates maximum
ring on high pressure
high pressure fluid
pump on lower sub-panel
delivery from 0 to
30 gpm.
PRESSURE CONTROL
Screw shaft adjustment
Maintains constant
on high pressure pump on
pressure in hydrau-
lower sub-panel
lic system as de-
livered by pump.
Fluid Temperature gauge
-20 degree to 200 de-
Indicates fluid
grees F temperature in-
temperature at high
dicator on panel
pressure pump inlet.
2-4
