Table 9-3.--Primary Control Panel Controls and Indicators
FIG. 9-7
INDEX NO.
CONTROL/INDICATOR
FUNCTION
1
Panel Lights (DS1, DS2, DS8)
Provide illumination for primary control panel light if
OFF-MASTER-ON switch S1 is set to ON.
2
HIGH PRESSURE FILTER Indicator Lights when high pressure filter element requires service.
Light (DS4)
3
PUMP CASE FILTER Indicator Light Lights when pump case filter requires service.
(DS5)
4
LOW PRESSURE FILTER Indicator Light Lights when low pressure filter element requires servicing.
(DS6)
5
FLUID TEMP WARNING LIGHT (DS7)
Lights when hydraulic fluid temperature increases to +160F
(+71.11C). This is trip setting of thermoswitch.
6
STOP Pushbutton Switch (S9)
Used to stop the electric motor.
7
COMPENSATOR CONTROL
Adjusts pressure at which compensation occurs in high pressure
pump when power supply is used as a high pressure system.
8
FLUID TEMPERATURE GAUGE
Indicates temperature of hydraulic fluid going to inlet of high
pressure pump.
9
SELECTOR VALVE
Provides selection of BOOST PUMP INLET, H.P. PUMP INLET, or
RETURN BACK PRESSURE line readings on compound gauge; 4th
position CALIBRATE GAUGE is for calibration of gauge.
10
COMPOUND GAUGE
Indicates (as selected by SELECTOR VALVE) back pressure
or suction in low pressure return line, inlet to boost pump, and
inlet to high pressure pump.
11
L.P. GAUGE TEST Fitting
Provides connection for external hydraulic source to calibrate
COMPOUND GAUGE. SELECTOR VAVLE must be in
CALIBRATE GAUGE position.
12
PRESSURE BYPASS VALVE
When opened, cause high pressure relief valve to dump flow to
return line at no pressure.
13
H.P. GAUGE TEST Fitting
Provides connection for external hydraulic source to test and
calibrate HIGH PRESSURE GAUGE. SELECTOR VALVE
must be in CALIBRATE GAUGE position.
14
HIGH PRESSURE GAUGE
Indicates hydraulic fluid pressure at PRESSURE OUTLET ports.
15
HOURMETER
Indicates total elapsed operating hours of power supply.
16
POWER ON Indicator Light
Lights when control circuit is energized and MASTER switch is
placed to ON.
17
OFF-MASTER-ON Switch (S1)
Energizes electrical control circuits.
18
START Pushbutton Switch (S10)
Starts electric drive motor
19
PRESSURE OUTLET Flow Meter
Indicates hydraulic fluid flow (in gallons per minute) to
PRESSURE OUTLET ports.
20
COMPOUND GAUGE Calibration Screw
Used to calibrate COMPOUND GAUGE when SELECTOR
VALVE is in CALIBRATE GAUGE position.
21
HIGH PRESSURE GAUGE Calibration U s e d t o c a l i b r a t e H I G H P R E S S U R E G A U G E w h e n
Screw
SELECTOR VALVE is in CALIBRATE GAUGE position.
9-11
