National Crane Published 03-18-2019 Control # 582-04 4-1
NBT30H-2 OPERATOR MANUAL SET-UP
SECTION 4
SET-UP
SECTION CONTENTS
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Outrigger Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Proper Leveling of the Crane . . . . . . . . . . . . . . . . 4-1
Bubble Level Adjustment . . . . . . . . . . . . . . . . . . . 4-1
Site Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Setting the Outriggers . . . . . . . . . . . . . . . . . . . . . . 4-2
Outrigger Monitoring System (OMS)
(Optional—Standard in North America) . . . . . . . . 4-2
Extension Safety Information . . . . . . . . . . . . . . . . 4-3
Side Folding Swing Around Extension Operation 4-4
Deployment Procedure . . . . . . . . . . . . . . . . . . . . . 4-4
Stowing Procedure . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Extension Removal . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Extension Maintenance . . . . . . . . . . . . . . . . . . . . . 4-7
Anti-two Block Weight Installation . . . . . . . . . . . . 4-8
Multi-part Line Reeving. . . . . . . . . . . . . . . . . . . . . . 4-8
Using Multiple Part Lines . . . . . . . . . . . . . . . . . . . . 4-8
Lifting a 30 Ton (60,000 lb) Load. . . . . . . . . . . . . . 4-8
Hoist Cable Installation. . . . . . . . . . . . . . . . . . . . . 4-10
Wedge Sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Terminator Wedge Installation. . . . . . . . . . . . . . . 4-10
Wedge Socket Installation . . . . . . . . . . . . . . . . . . 4-12
Dead-end Rigging . . . . . . . . . . . . . . . . . . . . . . . . 4-12
GENERAL
This section contains information on how to perform the
following tasks:
• Set the outriggers
• Erect the extension
• Stow the extension
• Remove the extension
• Use multipart reeving
• Install the hoist cable
• Install the anti-two-block weight
• Install a wedge socket
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,
whether lifting outriggers, 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 rear 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, page 4-2.
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, re level the crane using the
procedures under Setting the Outriggers, page 4-2.
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:
1. Position the crane on a firm, level surface.
2. Extend and set the outriggers. Level the crane, as
indicated by the bubble level indicator, using the
outriggers.
3. Place a miracle pointer level, carpenter level, or similar
type device on a machined surface such as the turntable
bearing or bearing mounting surfaces.
4. Using the outriggers, level the crane as indicated on the
leveling device used in step 3.
WARNING
Crushing Hazard!
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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