Manitowoc NATIONAL CRANE 900A - Stabilizer Proximity Switch (version 2); SIDE FOLDING SWING-AROUND JIB OPERATION

National Crane e
Stabilizer Proximity Switch (version 2)
Remove
1. Disconnect electrical connector (1, Figure 4) at switch.
2. Remove the two screws (2, Figure 4) securing the
switch (4) to the stabilizer box; remove switch.
Install
1. Fully extend stabilizer beam (horizontally).
2. Using two screws (2, Figure 4) secure the switch (4) to
stabilizer box.
3. Connect electrical connector (1, Figure 4) to switch.
4. With power on and stabilizer beam fully extended,
ensure LED (3, Figure 4) on proximity switch illuminates;
retract stabilizer beam and ensure LED is not
illuminated.
SIDE FOLDING SWING-AROUND JIB
OPERATION
The following note needs added to the Jib Deployment and
Stowing procedures:
NOTE: When lowering the boom below horizontal, two
persons may be required. With the telescope
control in neutral, the boom may creep out when
below horizontal.
FIGURE 4
3
2
1
4
7939-5
Reference Only