Manitowoc National Crane 600E-2, Operator'S Manual

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SET-UP OPERATOR MANUAL 600E2
4-2
PUBLISHED 04-26-2019 CONTROL # 113-09
• If the crane is equipped with a boom extension that is
deployed and rigged for work, repeat the test procedure
for the boom extension anti-two-block switch.
Work Site Selection
Always seek the best possible work site when parking the
crane. An ideal parking location at a job site is firm, level, dry
ground or pavement located in close proximity to the work
station. Avoid uneven, rocky or muddy terrain, steep grades
or locations with unnecessary overhead obstructions.
Location should be selected such that outriggers can be fully
extended and leg comes down on firm level surface.
Particular care must be taken when in the vicinity of
overhead power lines so that proper clearance conditions
can be maintained. Do not select a location at which the
boom could not come within minimum recommended
distance of the power lines at full extension.
Its best to select a location on the site such that most of the
lifting can be done over the outrigger support or rear of the
truck.
Before Leaving the Cab
1. Position the truck so that the outriggers can be extended
without encountering obstructions. Set the truck park
brake securely and turn front wheels into the curb.
Wheel chocks may be required under certain conditions.
2. With the gear shift in neutral, depress clutch (if equipped
with a manual transmission), and engage the power
takeoff by pulling out the shifting knob.
3. Bring the hydraulic system up to operating temperature
(oil reservoir warm to the touch) by allowing the system
to operate by actuating the outrigger retract switch with
all outriggers fully retracted.
If operating on sloping ground provide blocks. When lifting is
to be done on soft terrain or hot asphalt, support the
outrigger and stabilizer pads with bearing pads. Some
concrete and asphalt surfaces are relatively thin and cannot
support outrigger or stabilizer loading. Concrete can break
through and cause instability.
Variation in chassis, outrigger, and mounting configurations
will cause outrigger foot loading to differ on each crane,
however, outrigger foot loads can be as high as 40,000 lbs
(18,145 kg) when outriggers are at full span (131 psi
(0.9 MPa) on standard outrigger pads). Support surface
bearing capacities vary by a large amount from 833 psi
(5.7 MPa) on bed rock down to 14 psi (0.1 MPa) on soft clay.
Loose sand or soft asphalt will support even less load. It is
imperative that the operator take proper precautions to
insure the outrigger foot has adequate cribbing for existing
soil conditions.
If specific outrigger foot loading is required for an individual
crane, contact National Crane with actual chassis weights
and crane details.
OUTRIGGER SETUP
Proper Leveling of the Crane
ASME B30.5 specifies that if a crane is not level within 1% of
grade, the allowable capacities must be reduced. Therefore,
it is essential that the crane is level to within 1% of grade.
The bubble level that is provided on the crane is calibrated to
be accurate within 1% of grade.
To properly level the crane, the boom must be positioned
over the front of the crane, fully lowered to horizontal and
fully retracted (for cranes fitted with a boom rest, the boom
shall be stowed onto the rest). Raise and level the crane
using the outriggers; refer to
Setting the Outriggers and
Stabilizers , page 4-3.
A working crane may settle during lifting operations.
Frequently check the crane for level. When rechecking the
crane for level, the boom must be positioned over the front of
the crane, fully lowered to horizontal and fully retracted (for
cranes fitted with a boom rest, the boom shall be stowed
onto the rest). If necessary, relevel the crane using the
procedures under
Setting the Outriggers and Stabilizers ,
page 4-3.
Bubble Level Adjustment
The bubble level adjustment should be checked periodically;
if it is suspected that the bubble level indicator is out of
adjustment, verify and adjust the bubble level as follows:
CAUTION
If the light and audible alarm (extension-equipped cranes)
do not function as described and the crane movements
are not stopped, the system is not working properly. The
malfunction shall be corrected before operating the crane.
DANGER
To prevent the crane from tipping over.
• Make sure crane is level.
• Do not operate the boom until all outriggers are
extended and set providing firm support.
• Make sure the tires are clear of ground.
DANGER
Do not operate outriggers unless they are visible to either
the operator or a designated signal person to avoid
crushing injury.
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