National Crane Published 8-01-2017 Control # 287-11 7-1
NBT40 SERVICE MANUAL OUTRIGGERS
SECTION 7
OUTRIGGERS
SECTION CONTENTS
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Outrigger Beam Assembly . . . . . . . . . . . . . . . . . . . . . 7-1
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
Cable Tensioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
Outrigger Calibration . . . . . . . . . . . . . . . . . . . . . . . . . .7-6
Side Pads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-6
Top And Bottom Pads. . . . . . . . . . . . . . . . . . . . . . . . .7-8
Outrigger Monitoring System (OMS) (Optional—
Standard in North America) . . . . . . . . . . . . . . . . . . . . .7-8
String Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . .7-9
DESCRIPTION
The two section outriggers are and used to provide stability
for the truck when the crane is in use. The outriggers can be
used in the fully retracted, at the mid-extended position, or
the fully extended position.
When the outrigger extension is activated, it extends or
retracts the outrigger beam and/or stabilizer cylinders. The
outrigger beams can be extended to the mid-extend position
by rotating the lock pin into the lock position. The spring
loaded lock pin is injected into the hole when the beam
reaches the mid-extend position.
A hydraulic cylinder along with internal cables extend and
retract the two section outrigger beams.
OUTRIGGER BEAM ASSEMBLY
The outrigger beam assembly consists of the following:
• 1
ST
and 2
ND
section outrigger beams
• stabilizer cylinders
• required hoses and mounting hardware
Reference Only
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