Item Description
1Mast
2 Mast-Assist Arm and Cylinder
A Transport Position (fully lowered)
B Mast at 90° for Installing Crawlers and Carbody Counterweight with Assist Crane
C Maximum angle for attaching mast links to boom straps
D Fault 66 Icon: Mast too far forward.
This fault is activated when the mast is at 162°. Raise the mast. Do not lower the
mast any further with the boom hoist.
E Fault 13 Icon: Mast at 2°.
Mast stops and must be lowered the remainder of the way with the mast-assist
arms switch on the overhead console or on the remote control.
Figure 4-15
WARNING
Falling Mast Hazard!
Do not lower the mast below 162° with the boom hoist.
The boom hoist wire rope will rub on the drum rope guard.
Damage to the wire rope will occur, possibly causing the
rope to break and the mast to fall.
If it is necessary to lower the mast below 162° for any
reason, use an assist crane.
NOTE Mast must be raised to approximately 90°
when installing crawlers and carbody
counterweight. Mast-assist arm cylinders will
retract automatically as the mast is raised and
then extend when the mast is lowered.
DANGER
Falling Mast Hazard!
Do not the lower the mast-assist arms until the
mast is connected to the boom rigging. The mast
will fall over backwards if raised to vertical when
the mast-assist arms are down.
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