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NATIONAL CRANE
Published 11-01-2020 Control # 710-00
4-1
NBT60XL OPERATOR MANUAL
SET-UP
4
SECTION 4
SET-UP
SECTION CONTENTS
Outrigger Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Proper Leveling of the Crane . . . . . . . . . . . . . . . . 4-1
Bubble Level Adjustment . . . . . . . . . . . . . . . . . . . 4-2
Site Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Setting the Outriggers. . . . . . . . . . . . . . . . . . . . . . 4-2
Jib Safety Information . . . . . . . . . . . . . . . . . . . . . . 4-3
Erecting And Stowing The Jib. . . . . . . . . . . . . . . . 4-4
General Warnings . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Jib Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Deployment Procedure . . . . . . . . . . . . . . . . . . . . . 4-5
Stowing Procedure . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Jib Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Jib Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Jib Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Setting the Offset on the Telescopic Jib . . . . . . . 4-10
Setting the Offset on the Lattice Jib . . . . . . . . . . 4-10
Setting the Offset Mast . . . . . . . . . . . . . . . . . . . . 4-13
Anti-Two-Block Weight Installation . . . . . . . . . . . 4-14
Multi-part Line Reeving. . . . . . . . . . . . . . . . . . . . . 4-14
Using Multiple Part Lines . . . . . . . . . . . . . . . . . . . 4-14
Possible Multi-Part Line Reeving
Combinations. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Lifting the Rated Load . . . . . . . . . . . . . . . . . . . . . 4-20
Installing Rope on the Hoist . . . . . . . . . . . . . . . . . 4-20
Wedge Sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Removable Counterweights . . . . . . . . . . . . . . . . . 4-23
Using the Counterweight Control Panels. . . . . . . 4-23
Mounting the Top Counterweight on the
Superstructure . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
Stowing the Top Counterweight on the Carrier
Deck. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26
Mounting the Bottom Counterweight(s) . . . . . . . . 4-27
Stowing the Bottom Counterweight(s) . . . . . . . . . 4-28
This section contains information on how to perform the
following tasks:
•
Set the outriggers
•
Erect the jib
•
Stow the jib
•
Remove the jib
•
Use multi-part reeving
•
Install the hoist rope
•
Install the anti-two-block weight
•
Install a wedge socket
•
Mount/stow the removable counterweight
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. 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
should be stowed onto the rest).
NOTE:
To ensure a true reading always make sure the cab
tilt is completely lowered.
Raise and level the crane using the outriggers. Refer to
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
DANGER
Do not operate outriggers unless they are visible to either
the operator or a designated signal person to avoid
crushing injury.
!
Reference
Only
Содержание NBT60XL
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