Boom And Luffing Jib Angle Indicator; Mast And Gantry Sensor Adjustments; Mast Angle Indicator - Manitowoc 999 Service And Maintenance Manual

BOOM
BOOM AND LUFFING JIB ANGLE
INDICATOR
Angle indicator sensors are located inside node controllers
mounted on the boom top and on the luffing jib top.
The boom and luffing jib angles are calibrated automatically
by the crane's programmable controller as part of the load
indicator calibration procedure (see Rated Capacity
Indicator/Limiter Operation Manual for instructions).
MAST AND GANTRY SENSOR
ADJUSTMENTS

Mast Angle Indicator

The mast angle sending unit
(Figure 4-6) which sends an electric signal to the crane's
programmable controller. The programmable controller
converts the electric signal into an angle which can be
monitored on the digital display in the operator's cab and
used to control mast operation within the limits given in
4-2.
Table 4-2 Mast Operating Limits (Operating Limit Alert Comes on When any Limit is Reached)
Limit/Display Reading
MAST BELOW 25°
GANTRY DOWN
(occurs if mast is lowered to 135°
with gantry down)
MAST TOO FAR FORWARD
(occurs if mast is lowered to 175°)
1
Mast angles are measured from transport position which is 0°.
Electronic
Level
Angle
Sending Unit
P317
4-8
(Figure 4-5) houses a sensor
Table
1
Function Response
Can't Raise Gantry or Boom Up
Can't Boom Down
Can't Boom Down
Mast
FIGURE 4-5
Published 05-16-17, Control # 233-03
999 SERVICE/MAINTENANCE MANUAL
Angle Sensor Mounted Inside
P1518
Typical Node Controller Installation on
Boom or Luffing Jib Top.
Corrective Action
Raise mast with mast assist above 25°
Fully raise gantry
Raise mast. Further lowering is not intended.
Solid State Sensor (+/-100°)
Position Sensor
as Shown
Green
Black
A535
Red
FIGURE 4-4
0 - Black
82BA - Green
White 87FA - White
FIGURE 4-6