Manitowoc GROVE RT890E Operator's Manual page 44

OPERATING CONTROLS AND PROCEDURES
power brake valve to apply pressure to the brake assembly.
This pressure aids the spring pressure to overcome the
hydraulic pressure being applied to the brake release circuit
and applies the spring brake according to the pressure from
the swing power brake valve.
Telescope Control Foot Pedal
The telescope control foot pedal (39) is located on the left
side of the cab floor. Pushing forward on the top of the pedal
will extend the boom and pushing down on the bottom of the
pedal will retract the boom.
Windshield Wiper
A windshield wiper (40) is installed on the front of the cab.
The wiper is controlled by the knob on the turn signal lever,
and is used to remove moisture from the windshield.
Defroster Fan
A defroster fan (41) is located at the front of the dashboard.
The fan is controlled by the defroster switch on the front
console, and is used to circulate air to remove moisture and
fog from the inside of the windshield.
Service Brake Pedal
The service brake pedal (42) is the second pedal from the
right on the cab floor. Depressing the pedal controls the
application of the service brakes.
Spotlight (Optional)
The spotlight (43) is mounted on the outside of the cab roof
in the right front corner. The light can be tilted 180 degrees
and rotated 360 degrees from inside the cab. The switch that
activates the spotlight is located on the end of the spotlight
arm.
Foot Throttle Pedal
The foot throttle pedal (44) is located directly under the LMI
display module on the cab floor. It is used to control engine
RPM which increases or decreases proportionately with the
amount of foot pressure applied to the pedal. The pedal is
electrically connected to the superstructure control module
which sends the signal to the engine ECM via the J1939 data
link.
NOTE: The throttle mode switch must be in the "foot"
position.
Transmission Shift Lever
The transmission shift lever (45) is located on the right side
of the steering column. The control lever operates the
transmission selector valve electrically. Positioning the lever
up actuates forward and positioning the lever down actuates
reverse. When the lever is in neutral, it rests in a detent. To
3-8
move the lever up or down, pull back on the lever first. To
shift the transmission to first, second, or third gear, rotate the
knob to 1, 2, or 3.
Circuit Breaker Panel
The circuit breaker panel (46) is located on the right side of
the cab in front of the pin house lock control. It contains 18
circuit breakers and 1 fuse that protect the various electrical
components of the crane.
Turntable Lock Control (Pin Type)
The turntable lock control handle (47) is located beside the
front console on the right side of the cab. The purpose is to
lock or unlock the turntable. To lock the superstructure, the
cable must be depressed and the knob must be turned to the
right (clockwise). To unlock the superstructure, the cable
m u s t b e p u l l e d a n d t h e k n o b t u r n e d t o t h e l e f t
(counterclockwise).
NOTE: Turning the knob only locks and unlocks the cable.
Hoist Rotation Indicators
The hoist rotation indicators (48) are located on top of each
hoist control lever. The indicators are electronically driven by
a signal from an electronic transmitter and sensor attached
to each hoist. A pulsating signal is sensed by the operator's
thumb during hoist operation.
Main Hoist Control Lever
The main hoist control lever (49) is located on the right
armrest. The lever, when positioned forward (lowers the
cable) or back (raises the cable), actuates the control valve
through hydraulic pilot pressure to raise or lower the main
hoist cable.
360 Degree Swing Lock Control (Positive
Lock Type)
The 360 degree swing lock control lever (optional) (50) is
located on the right side of the operator's seat next to the
control armrest. The purpose of the swing lock is to secure
the superstructure in position at any point in its 360 degree of
rotation. The lock is engaged when the control lever is
pushed down and disengaged when the control lever is
p ul l ed u p. T he c o nt r o l l ev er i s a dj u st ed to r eq ui r e
approximately 20.4 kg (45 lbs) of force to move the lever into
the engaged position.
Main Hoist Speed Selector Switch
The MAIN HOIST SPEED selector rocker switch (51) is
located on the right armrest. It is a three position switch
(HIGH/OFF/LOW) placarded HIGH, OFF, and LOW.
Positioning the switch to HIGH energizes a solenoid
RT890E