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Figure 2-2. Start - up Panel, Controls
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TM-55-4920-405-13-P Test Stand Hydraulic System Gasoline Engine Driven Type D-5C Manual
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Table 2-2. Function of Startup Panel Controls
TM 55-4920-405-13&P
Function of Main Panel Controls and Instrumentation
Table 2-1.
Description
Index No.
Function
1
Dual purpose instrument; indicates engine speed (0-2500
METER
RPM) and elapsed operating time of test stand
2
ENGINE OIL PRESSURE
Direct reading gage indicates engine oil pressure; normal
pressure is shown by green region on gage
gage
3
Direct reading, 30-0-30 ampere meter, located in battery
charging circuit; normal reading during operation is at
some point to right of zero
4
FUEL LEVEL gage
Indicates amount of gasoline in gas tank of test stand; full
tank provides at least four hours of operation
5
FLUID PRESSURE GAGE
High pressure (0-6000 PSI) fluid gage; measures output
pressure of test stand
Provides means for connecting external gage for calibra-
6
HP GAGE CAL PORT
tion of FLUID PRESSURE GAGE; make sure cap on this
port is securely fastened during normal operation of test
stand
SUCTION PRESSURE GAGE
7
Direct reading gage (0-30 inches of vacuum, 0-150 PSI
p r e s s u r e ) ; measures suction pressure of test stand
8
SUCT PRESS CAL PORT
Permits connection of external gage for calibration of
SUCTION PRESSURE GAGE; make sure cap on this port
is securely fastened for normal operation of test stand
9
FLUID TEMP GAGE
Measures temperature of hydraulic fluid over range of
-20 to +250F, with red warning zone beginning at
+160F; never allow fluid temperature to rise above
+160 F
Indicates level of hydraulic fluid in reservoir of test stand
RESERVOIR FLUID LEVEL
10
INDICATOR gage
Indicates rate of flow of hydraulic fluid in GPM at 1800
11
FLOW INDICATOR GPM
RPM
Controls flow of hydraulic fluid from test stand; locking
12
FLOW CONTROL VALVE
device is provided to lock control knob at selected setting
Lights when high pressure filter differential fluid pressure
13
HP P indicator
reaches 40 PSI, indicating need to replace high pressure
filter element
I
14
Positions cam plate of hydraulic pump to provide desired
VOLUME control
output volume; locking device is provided for locking
control at selected setting
15
RESERVOIR valve
When set to OUT, shuts off test stand reservoir to per-
mit use of external reservoir; when set to IN, turns on
test stand reservoir
16
PRESSURE COMPENSATOR
Provides means of adjustment to obtain desired discharge
pressure; locking device is provided for locking control
at selected setting
Used to isolate pressure compensator from hydraulic
17
COMPENSATOR SHUTOFF
system and establish setting of HIGH PRESS RELIEF
VALVE
VALVE; when closed, prevents hydraulic pump from
compensating, thereby allowing pump to go to maxi-
mum pressure
18
Adjustable, bypass type relief valve that serves as
HIGH PRESS RELIEF VALVE
safety device, protecting hydraulic system under test
from excessive pressure; knurled locknut is provided
to lock valve at selected setting
2-4

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