Manitowoc GROVE RT890E Operator's Manual page 43

RT890E
Load Moment Indicating (LMI) and Work
Area Definition System Control Panel
The LMI and Work Area Definition System control panel (28)
is located on the right side of the front console. It maintains
the controls and indicators for the crane's Load Moment
Indicating (LMI) System and Work Area Definition System.
Refer to the LMI Manual for detailed information.
Auto/Manual Boom Telescope Mode Switch
The boom auto/manual telescope mode switch (29) is
located on the right armrest. The switch is a two-position
rocker switch placarded auto and manual. This switch has a
lock to prevent accidental activation.
When the switch is in the auto mode, the boom sections
extend in a predetermined sequence when telescoping the
boom. The sections retract in the same manner in reverse
order.
When in the manual mode, the red LED square in the switch
will illuminate and the boom telescope section select switch
is positioned to either the center mid or inner mid position in
order to extend or retract the selected section until it is
r e t u r n e d t o t h e p r o p e r p o s i t i o n f o r n o r m a l b o o m
synchronization to occur.
Center Mid/Inner Mid Boom Telescope
Section Select Switch
The center mid/inner mid boom telescope section select
switch (30) is located on the right armrest. This switch is a
three position rocker switch that is used in conjunction with
the boom auto/manual telescope mode switch. When the
boom mode switch is positioned to manual, the boom
telescope section select switch is positioned to either of the
two positions. When placed in the upper position, the center
mid can be extended. When the center mid is fully extended,
the outer mid and fly can be controlled. The red LED square
will illuminate when the switch is positioned in either inner
mid or center/mid position.
Rear Steer Control Switch
The REAR STEER control switch (31) is a three-position,
momentary, spring centered to off, rocker switch, located on
the left armrest. Positioning the switch to the right (R)
actuates a control valve to turn the rear wheels to the left,
causing the crane to turn to the right. Positioning the switch
to the left (L) actuates a control valve to turn the rear wheels
to the right, causing the crane to turn to the left. Releasing
the switch allows it to spring return to the center off position.
Auxiliary Hoist Speed Selector Switch
(Optional)
The auxiliary hoist (AUX HOIST) switch (32) is a three
position rocker switch (HIGH/OFF/LOW) located on the left
OPERATING CONTROLS AND PROCEDURES
armrest. The auxiliary hoist switch must be in either HIGH or
LOW position before the auxiliary hoist can be operated.
Positioning this switch to OFF prevents the operator from
accidentally activating the auxiliary hoist. With the switch in
either HIGH or LOW position, the amber LED square in the
switch will be illuminated.
Swing Control Lever
The SWING control lever (33), located on the left armrest,
controls the swing function. The lever, when positioned
forward (rotates the turntable clockwise) or back (rotates the
turntable counterclockwise), actuates a control valve through
hydraulic pilot pressure to provide 360 degree continuous
rotation in the desired direction.
Turn Signal Lever and Windshield Wiper/
Washer Controls
The turn signal lever and windshield wiper/washer controls
(34) are located on the left side of the steering column.
Pushing the turn signal lever down causes the left turn signal
indicator lamp and the left front and left rear turn signals to
flash. Pushing the turn signal lever up causes the right turn
signal indicator lamp and the right front and right rear turn
signals to flash. The windshield wiper switch is incorporated
in the turn signal lever. The knob of the lever has three
positions: O, I, and II. Pushing the button in the end of the
knob energizes the windshield washer pump to spray
washer fluid on the windshield. Positioning the knob to I
operates the wiper at low speed and positioning the knob to
II operates the wiper at high speed. Positioning the knob to O
turns the wiper motor off and automatically returns the wiper
to the parked position.
Bubble Level Indicator
The bubble level indicator (35) is located on the left side of
the cab by the door latch plate. The indicator provides the
operator with a visual aid in determining the levelness of the
crane.
Cab Circulating Fan
The cab circulating fan (36) is located on a mounting bracket
on the left front side of the cab, above the window frame. A
swivel allows the fan to be rotated and a switch on the fan
base controls the fan.
Swing Brake Pedal
The swing brake pedal (38) is located on the left side of the
cab floor. The swing brake pedal is used to actuate the swing
brake to slow or stop swing motion. Braking is proportional to
pedal depression. With the pedal not depressed and the
swing brake control valve disengaged, hydraulic pressure is
applied to the brake, overcoming spring pressure and
releasing the brake. Depressing the pedal actuates a swing
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