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12 ► GTR20 User Manual
the operator has selected with the ow selector switch.
When a tool is not being used the engine will not return
to idle until either the ow selector switch is turned to
the off position or the throttle control switch is turned to
auto-on.
Note: It may be necessary to reset the Controller.
At times it may be neccessary to reset the controller.
This could happen if a fault occurs in the controller. For
example, excessive engine speed. If a fault does occur
the power unit will return to an idle and the operator will
have no control of the unit. To reset the controller, simply
turn off the power unit and restart it.
USING THE 12 VOLT DC OUTLET
A 12 VDC outlet is on specic models. The DC outlet is
ON at all times.
STARTUP
Before starting the engine make sure the ow selector
switches are in the OFF position.
Note: The power unit will not start if the ow selec-
tor switches are not in the "OFF" position.
Pull choke knob out and move the Throttle Control
Switch to the auto-idle-off or the auto-idle-on position,
whichever mode of operation the operator prefers. En-
sure the ow selector switch is in the OFF position.
Turn the Ignition Switch to the START position. After the
engine starts, release the switch.
Gradually push in the choke knob as the engine begins
to idle smoothly.
Allow the engine to warm up.
Connect hoses and the tool as desrcribed on pages 7
and 8.
CONTROLS
This unit is equipped with an advanced proportional en-
gine control system. It provides a means of controlling
engine speed by adjusting the fuel control lever with an
actuator. The Power Unit provides two 5 gpm/19 lpm up
to 2000 psi/140 bar circuits or one 10 gpm/37.8 lpm up
to 2000 psi/140 bar circuit.
Figure 3. Panel Control Valve
Two 5 gpm hydraulic tools can be connected to the tool
circuit or one 10 gpm tool. The circuit is activated by
turning one or both ow selector switches to 5 or both
switches to 10 gpm. If both are at 10 gpm, 10 gpm can
be had by connecting to either coupler set.
THROTTLE CONTROL
The throttle control permits the operator to select one
of 2 operating modes after the engine has warmed up.
When starting the engine, make sure the ow selector
switch is in the OFF position. The throttle control switch
can be set in either the AUTO-IDLE-ON or AUTO-IDLE-
OFF positions.
AUTO-ON
When the throttle control switch is in the "AUTO-ON"
position, the oil ow is regulated automatically when the
trigger on the tool activated. When the tool is not being
used the engine will return to idle automatically, after a
10 second delay.
This setting will produce one or two 5 gpm/19 lpm cir-
cuits or one 10 gpm/37.8 lpm circuit depending on which
postion the operator has selected with the ow selector
switch.
AUTO-OFF
When the throttle control switch is in the "AUTO-OFF"
position, the engine speed is held to maintain 5 gpm/19
lpm or 10 gpm/37.8 lpm depending on which position
The accessories (if left on) that are plugged
into this outlet could drain the battery.
IMPORTANT
Throttle Control Switch
Flow Selector tool
Circuit 2 Switch
Ignition Switch
Flow Selector tool
Circuit 1 Switch
OPERATION