Reference
Only
OPERATING CONTROLS AND PROCEDURES
2250 MAX-ER 2000 OPERATOR’S MANUAL
3-18
Published 01-08-13, Control # 049-05
LEAVING CRANE UNATTENDED
When crane is left unattended, it shall be parked as
instructed in Section 3 of the Crane Operator’s Manual. The
following additional steps shall be taken if the boom cannot
be lowered to ground.
1.
Position boom at mid-point of boom angle range given in
Capacity Chart.
If wheeled counterweight assembly did not lower to
ground when step 1 was performed, boom up until
counterweight is on ground.
2.
Turn on boom hoist park and secure boom against
movement by wind or other outside forces.
WIND CONDITIONS
Wind adversely affects lifting capacity and stability as shown
in Figure 3-22. The result could be loss of control over the
load and crane, even if the load is within the crane’s capacity.
Wind speed (to include wind gusts) must be monitored by job
planners and supervisors.
The wind speed at boom or jib point can be greater than wind
speed at ground level. Also be aware that the larger the sail
area of the load, the greater the wind’s affect on the load.
As a general rule, ratings and operating speeds must be
reduced when:
Wind causes load to swing forward past allowable
operating radius or sideways past either boom hinge
pin.
For wind conditions specific to this crane, see Wind
Conditions Chart at end of this section or, if applicable, see
wind conditions in Capacity Charts provided with crane and
attachments.
WARNING
Tipping Crane Hazard!
D o n o t l e a v e c r a n e u n a t t e n d e d w i t h w h e e l e d
counterweight assembly off ground. Counterweight will
lower if pressure in counterweight cylinders bleeds off
over extended period of time. Crane may tip forward when
counterweight lowers.
WARNING
Tipping Crane Hazard!
Judgment and experience of qualified operators, job
planners, and supervisors must be used to compensate
for affect of wind on lifted load and boom by reducing
ratings or operating speeds, or a combination of both.
Failing to observe this precaution can cause crane to tip
or boom and/or jib to collapse. Death or serious injury to
personnel can result.
