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Reference
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MAINTENANCE
2250 MAX-ER 2000 OPERATOR’S MANUAL
6-2
Published 01-08-13, Control # 049-05
Adjusting Angle Indicator
Perform following adjustment steps at initial installation, after
installing a new sending unit or potentiometer, and at least
monthly when boom is lowered to ground.
1.
Lower boom onto blocking at ground level.
2.
Scribe a line through punch marks on center line of
boom butt as shown in Figure 6-3.
3.
If center line of boom butt is not punch marked, locate
center line as instructed in Figure 6-3.
4.
Hold a protractor-level along scribed line.
5.
Record angle indicated on protractor-level.
6.
Scroll to corresponding boom angle on digital display in
operator’s cab.
7.
Angle shown on digital display must match angle
recorded in step 4 plus or minus one degree.
8.
If necessary, loosen mounting screws and rotate
sending unit in mounting slots until reading on digital
display matches angle on protractor-level.
9.
Securely tighten mounting screws to lock adjustment.
Replacing Sending Unit Assembly
Replacement sending units can be either the pendulum-type
potentiometer (past production) or the solid state sensor
(current production).
Pendulum-Type Potentiometer
When replacing parts in the pendulum-type potentiometer
sending unit, take the following precautions (see Figure 6-4,
View A):
1.
Mount potentiometer at angle shown.
2.
Connect black, green, and white wires from receptacle
to proper terminals on terminal strip.
3.
Connect wires from potentiometer to proper terminals on
terminal strip.
4.
Make sure all parts are securely fastened to their
mounting position.
Solid State Sensor
When replacing an existing pendulum-type potentiometer
with a current production solid state sensor, take the
following precautions (see Figure 6-4, View B):
1.
Identify all input wires to existing potentiometer.
2.
Cut existing input wires near terminal strip (if used) to
allow for splicing.
3.
Remove existing potentiometer and terminal strip (if
used).
4.
Mount new sensor in existing holes as shown in View B.
5.
See wiring chart in View B and parallel splice sensor
wires to existing input wires with crimp, solder, and heat
shrink tubing.
6.
Seal green wire on sensor with heat shrink tubing and
coil up.
#79 Boom Butt
(right outboard side)
Scribed Line on
Centerline of Boom Butt
Protractor-Level
FIGURE 6-3
A1162
To locate center of boom or jib butt,
punch mark two points equally spaced
between edges of plate work about 1 ft
(0,3 m) apart.
Then scribe a line through punch marks.
Equal
Distance