Manitowoc 999, Service And Maintenance Manual

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Reference
Only
BOOM 999 SERVICE/MAINTENANCE MANUAL
4-8
Published 05-16-17, Control # 233-03
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 4-5 ) houses a sensor
( 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
Table
4-2 .
Table 4-2 Mast Operating Limits (Operating Limit Alert Comes on When any Limit is Reached)
Typical Node Controller Installation on
Boom or Luffing Jib Top.
Angle Sensor Mounted Inside
P1518
FIGURE 4-4
Limit/Display Reading
1
1
Mast angles are measured from transport position which is 0
°
.
Function Response Corrective Action
MAST BELOW 25 ° Can’t Raise Gantry or Boom Up Raise mast with mast assist above 25 °
GANTRY DOWN
(occurs if mast is lowered to 135
°
with gantry down)
Can’t Boom Down Fully raise gantry
MAST TOO FAR FORWARD
(occurs if mast is lowered to 175
°
)
Can’t Boom Down Raise mast. Further lowering is not intended.
FIGURE 4-5
P317
Electronic
Level
Angle
Sending Unit
Mast
FIGURE 4-6
A535
Solid State Sensor (+/-100°)
87FA - White
82BA - Green
Black
Green
White Red
0 - Black
Position Sensor
as Shown