Manitowoc 2250 User Manual

Reference Only
OPERATING CONTROLS AND PROCEDURES 2250 OPERATOR MANUAL
3-30
Published 06-24-16, Control # 241-01
Boom Down Limit (if equipped)
This limit automatically stops the boom when it is lowered to
a preset minimum angle (usually 0°).
The boom can be raised after the limit is contacted.
The limit bypass switch must be turned to the BYPASS
position before the boom can be lowered below the limit.
Block-Up Limit
This limit automatically stops the boom or luffing hoist from
lowering and the load drum from hoisting if the load contacts
a block-up limit switch.
The load on the corresponding drum can be lowered, and the
boom or luffing jib can be raised after a block-up limit switch
is contacted.
The limit bypass switch must be turned to the BYPASS
position before the load can be hoisted above the limit.
Luffing Jib Up Limits
Two luffing jib up limits are provided:
• Luffing Jib Maximum Up 1—This limit automatically
stops the luffing hoist when the boom-to-luffing jib angle
is 168°.
The limit bypass switch must be turned to the BYPASS
position to allow the jib to be raised an additional 2° to
the Luffing Jib Maximum Up 2 limit.
• Luffing Jib Maximum Up 2—This limit automatically
stops the luffing hoist when the boom-to-luffing jib angle
is 170°.
This limit can be bypassed only when the attachment is
lowered to the ground (boom below 50°). Turn the limit
bypass switch to the BYPASS position to bypass the limit.
The luffing jib can be lowered after either limit is contacted.
NOTE: For cranes meeting 2010 European Requirements,
the luffing jib cannot be lowered after the Luffing Jib
Maximum Up 2 limit is contacted, until the limit
switch is reset. When the limit is contacted, the
screen shown in Figure 3-11
will appear on the
digital display.
Once the screen appears, confirm it to reset the
limit switch. The luffing jib can then be lowered.
WARNING
Falling Boom Hazard!
Avoid serious injury and equipment damage from a falling
boom.The wire rope could be pulled out of the drums,
allowing the boom to fall.
When lowering the boom below the Boom Down limit, do
so slowly with extreme caution. Do not lower the boom to
the point where less than three full wraps of wire rope are
on boom hoist drums.
WARNING
Two-Blocking Hazard!
Avoid serious injury from a falling load. If it is necessary to
hoist a load above the block-up limit, do so slowly with
extreme caution to prevent two-blocking.
Do not hoist the load above the minimum block clearance
given on the Range Diagram in the Capacity Chart
Manual.
Do not use the limit bypass switch to lower the boom or
luffing jib after the block-up limit is contacted. Two-
blocking could occur, causing the load to fall.
WARNING
Falling Boom/Jib Hazard!
Avoid serious injury or equipment damage. Raising the
luffing jib above the Luffing Jib Maximum Up 2 limit will
cause structural damage and possibly cause the boom
and luffing jib to be pulled over backward.
Proceed slowly when operating the luffing jib above the
Luffing Jib Maximum Up 1 limit.
LUFFING JIB MAX UP 2
CONFIRM TO RESET
FIGURE 3-11

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English