Manitowoc NTC55 User Manual

NATIONAL CRANE Published 9-26-2018 Control # 646-02 4-9
NTC55 OPERATOR MANUAL SET-UP
4
JIB REMOVAL
NOTE: The hoist cable must be routed over the mast
assembly and under the roller on the mast for all
configurations.
To remove the jib, proceed as follows:
1. Using boom telescope function, fully retract boom.
2. Using lift function, lower boom so that attachment pins (6
and 7, Figure 4-3) are easily accessible from the ground.
NOTE: When lowering the boom below horizontal, two
persons may be required. With the telescope
control in neutral, the boom may slide out when
below horizontal.
3. Install right side attachment pins (6, Figure 4-3) in upper
and lower jib lugs, secure with retainer spring clips.
These pins are used as a pivot point to swing jib into the
deployed position.
4. Locate the stowed position of attachment pins (7,
Figure 4-3). If in jib attachment holes or boom sheave
case jib holes, remove pins from storage location.
5. Remove jib swing pin (5, Figure 4-3) from top ear of jib.
6. Remove stow pin (1, Figure 4-3) and stow in hook
bracket (3), secure with spring clip.
7. Attach tag line to sheave case end of jib.
8. Using the lift function, raise the boom to the horizontal
position.
9. Using telescope function, slowly extend boom
approximately one foot. This procedure will pull the jib
out of the hook bracket (3, Figure 4-3).
10. Support and raise the jib at its balance point, then
remove right side attachment pins (6, Figure 4-3) in
upper and lower jib lugs. Jib is now free of boom.
11. To install, proceed in reverse order of removal.
JIB MAINTENANCE
1. Lubricate as outlined in the section titled Lubrication
Procedure and Charts, page 5-1.
2. Check for free rotation of jib sheave daily when using jib.
Setting the Offset
1. Extend and set the outriggers. Swing the boom over rear
of truck chassis.
2. To set the offset from zero degrees (0°) to thirty degrees
(30°), perform the following:
a. Slowly lower the boom until the tip of the swingaway
is on the ground and the pressure on the offset pin is
relieved.
b. Remove the lock pin, two washers, and offset pin.
c. Slowly elevate and telescope the boom at the same
time until the offset shaft takes the full load of the
swingaway.
3. To set the offset from thirty degrees (30°) to zero
degrees (0°), perform the following:
a. Slowly lower the boom until the tip of the swingaway
is on the ground and the offset pin can be installed.
b. Install the offset pin, two washers, and lock pin.
c. Deploy the offset mast in the extended up position.
See Setting the Offset Mast, page 4-9
d. Secure offset mast with lock pin.
e. Route hoist cable in sheave and install retaining pin.
f. Raise the boom and operate as desired.
Setting the Offset Mast
NOTE: NOTE: The hoist cable must be routed over the
mast assembly and under the roller on the mast for
all configurations.
CAUTION
Use caution during this step. The jib is free to swing away
from the boom upon boom extension.
!
CAUTION
The mast assembly (10, Figure 4-4) must be positioned
on top of the base section before attempting to use the
swingaway. Failure to do so can cause damage to the
mast and/or swingaway adapter.
CAUTION
Do not overload the swingaway or the attachment points
when lowering the boom.
CAUTION
The mast assembly (10, Figure 4-4) must be positioned
on top of the base section before attempting to use the
swingaway. Failure to do so can cause damage to the
mast and/or swingaway adapter.

Manitowoc NTC55 Specifications

General

Brand	Manitowoc
Model	NTC55
Category	Construction Equipment
Language	English