Grove Published 3-25-2020, Control # 595-10 3-9
GRT8100 OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
Boom Lift/Main Hoist Control Lever (Dual
Axis)
The Boom Lift/Main Hoist Control Lever (1) Figure 3-6 is
located on the right armrest. The controller, when pushed to
the right lowers the boom, or pushed left raises the boom.
When used for main hoist, the controller, when pushed
forward lowers the cable, or pulled back raises the cable.
Swing/Telescope or Swing/Auxiliary Hoist
Control Lever (Dual Axis)
The Swing/Telescope or Swing/Auxiliary Hoist (Swing/Tele
or Swing/Aux) Control Lever (2) Figure 3-6 is located on the
end of the left armrest. The lever controls swing and
telescope functions when crane is not equipped with an
auxiliary hoist.
When equipped with an auxiliary hoist, the lever controls
swing and auxiliary hoist functions. Telescope functions are
controlled through a foot pedal.
If not equipped with an auxiliary hoist, positioning the lever to
the left or right actuates a control valve through hydraulic
pilot pressure to provide 360 degree continuous rotation in
the desired direction. Positioning the lever forward actuates
the control valve to telescope the boom out and pulling the
lever back actuates the boom to telescope in.
If equipped with an auxiliary hoist, positioning the lever
forward actuates the control valve to let out hoist cable and
pulling the lever back reels the cable in. Moving the lever in a
diagonal direction actuates the two functions simultaneously.
Main Hoist Enable Switch
The Main Hoist Enable Switch (3) Figure 3-6 is a momentary
switch that is located on the right armrest. Press once to
enable hoist; press again to disable hoist. Pressing the
switch twice rapidly enables hoist at high speed. Pressing
once and holding the switch for about 2 seconds also
enables high speed.
Boom Up Bypass Switch
The Boom Up Bypass Switch (4) Figure 3-6is a momentary
two-position rocker switch that is located on the right
armrest. While lift function is enabled and in a RCL lockout
condition, pressing and releasing the Boom Up Bypass
Switch will enable boom lift up.
The following indicators illuminate to indicate the limiter is
bypassed:
• Bypass 2 Pressed indicator is on constant (only when
switch is pressed)
• Bypass 2 Active indicator is on constant
• RCL Lockout LED is on constant when capacity is
greater than 100%
For CE certified cranes only, the speed of the boom up
function is reduced by 50% when actuated. For non-CE
Certified cranes, the boom up function operates at normal
speed when actuated.
The boom up function lockout is bypassed until one of the
following occurs:
• Boom Up Bypass switch is again pressed and released
while joysticks are in neutral position
• Boom up joystick is in neutral position for 10 seconds,
and load is greater than 90% capacity and less than or
equal to 100% capacity
• Load is reduced to less than 90% of capacity
Lift Function Enable Switch
The Lift Function Enable switch (5) Figure 3-6 is a
momentary switch that enables boom up and boom down.
12 Swing Enable Switch 26
Cab Door Release Lever
13 Seat Slide Lever 27 Hoist Rotation Indicators (Not Shown)
14 AC/Heater Climate Unit 28 Seat Switch (Not Shown)
Item Description Item Description
DANGER
Crushing Hazard!
Death or serious injury could result from being crushed by
moving machinery.
Before actuating swing or other functions, sound horn and
verify all personnel are clear of rotating and moving parts.
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