Operation
26
7/27/12
Operation Manual - SP 305
The control panel
The control panel (Figure 12) contains:
• Engine oil pressure indictor lamp - This lamp
illuminates only when there is no engine oil
pressure, so it is normal for it to light when the key
switch is on but the engine is not running. It is
not
normal for it to light when the engine is running; if
that happens, you should stop the engine
immediately.
• Emergency stop button (also known as an
E-stop
switch
). This is a standard, red-faced push button.
Pushing it disables all the circuits on the unit,
including the accumulator circuit, by stopping the
diesel engine. The engine stops because the E-stop
switch also disables the diesel engine fuel shutoff
valve. The E-stop switch must be turned and pulled
to reset, and it must be out to start the engine. The
emergency stop switches on the driver side of the
pump and on the remote control have identical
functionality and are wired in series with the
emergency stop on the control panel.
• Hour meter - This meter keeps track of the number
of hours on the diesel engine and hydraulic pumps.
Use it to keep track of hours for maintenance
purposes.
• Engine temperature indicator lamp - This lamp
illuminates whenever the engine oil becomes too
hot. Hot oil is a sign of a loose, worn, or broken V-
belt or of oil that is so old that the viscosity
properties have broken down.
• Key switch - Starts and stops the diesel engine, and
supplies power to the rest of the electrical system.
• Charging system lamp - This should illuminate if
the key switch is in the
on
position, but the engine
is not running. It should also illuminate if the
engine is running but the V-belt breaks or the
alternator stops working.
• Remote control cable receptacle - This is where
you plug in the remote control box cable. The plug
is covered with a weather proof cap which must be
removed to plug in the remote cable
.
• Concrete pump local - off - remote switch - Selects
between local control concrete pump on, concrete
pump off and remote control. When
remote control
is selected, the pump on - off function is
transferred to the remote control box. When you
select the
off
position, the hydraulic pump
maintains a standby pressure of 300 PSI.
• Concrete pump forward - off - reverse switch -
When the
local - off - remote
switch is in the
local
position, then the
forward - off - reverse
switch is
active for controlling pump forward and reverse
functions. This switch does nothing when the
local
- off - remote
switch is set to
remote
.
• Other switches - as labeled
controlpnl.eps
98347087
Oil cooler
switch
Dummy
Plug
Emergency
stop switch
Hour
meter
Engine
oil pressure
lamp
Diesel
glow plug
lamp
Engine
coolent temp.
lamp
Charging
system
lamp
Engine RPM gauge
Pump
-Local-
-Off-
-Remote-
switch
Key switch
Pump
-Forward-
-Reverse-
switch
Agitator
On-Off_
switch
Vibrator
-Forward-
-Off_
-Manual-
switch
Pump
Off
switch
Hobbs
I
QUARTZ
0 0 0 0 0 0
HOURS
0
10
20
30
40
RPM
X 1000
Optional electronic
throttle control
Figure 12
The control panel
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