Manitowoc Published 05-03-17, Control # 228-03 4-7
16000 SERVICE/MAINTENANCE MANUAL BOOM
BOOM AND LUFFING JIB ANGLE
INDICATOR
Angle indicator sensors are located inside the node
controllers mounted on the boom top and on the luffing jib
top (see Figure 4-5
). The boom and luffing jib angles are
calibrated automatically by the crane’s programmable
controller as part of the load indicator calibration procedure
(see the RCL Operation Manual for instructions).
MAST ANGLE
See Figure 4-6 for the following.
Mast Angle Sensor
The mast angle sending unit (Figure 4-6) houses a solid-
state sensor (Figure 4-8
) that provides an electrical signal to
the crane’s programmable controller. The programmable
controller uses the signal to automatically control the position
of the mast raising cylinder and levers during crane setup, as
well as to allow the operator to monitor the mast angle on the
display during crane setup.
Adjusting Mast Angle
The mast angle sensor was set at the factory and should not
require periodic adjustment. However, adjustment is
necessary when parts are replaced. To adjust the mast angle
sensor, use the following procedure:
1. Park the crane on a solid, level surface.
2. Lower the mast to the transport position.
3. Place a digital protractor-level on the mast (Figure 4-6
)
and note the mast angle.
4. Go to the mast angle on the information screen of the
main display. Note the mast angle.
5. The angles noted in steps 3 and 4 must match within 1°.
6. If necessary, loosen the mounting screws and rotate the
sending unit in the mounting slots until the reading on
the display matches the angle on the level.
7. Securely tighten the mounting screws to lock the
adjustment.
Boom or Jib Top
Node Controller
Table 4-3
Wires
Receptacle
ID
Function
Red J17-1 Ground
Green J17-2 Signal
Black J17-3 5 VDC Supply
White Not Used
Scribe
Line
3.2°
Sensor
FIGURE 4-5
A08268e
FIGURE 4-6
P317
Digital
Protractor-
Level
Angle
Sending Unit
Left
Mast Leg
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