NTC55 OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES
National Crane Published 9-26-2018 Control # 646-02 3-21
Stowing and Parking
When parking the crane, it should be placed in the smallest,
most stable operational configuration that the job site
practically allows by doing the following steps:
1. Park the crane on a stable surface.
2. Remove the load from the hook.
3. Stow the swingaway jib, if erected.
4. Fully retract the boom and position it in the normal travel
position, then perform the following and proceed to
Step 6:
a. Engage the swing brake and/or swing lock.
b. Retract all jack cylinders and outrigger beams.
5. If it is not practical to fully retract the boom and place it in
the travel position, then perform the following and
proceed to Step 6:
a. Make the crane as stable as possible, including,
boom angle, superstructure orientation, jib angle,
etc. In high winds, the boom and jibs should be
lowered or secured.
b. Engage the swing brake and/or swing lock.
6. Apply the parking brake.
7. Put all operating controls in the neutral position.
8. Position the Crane Function switch to OFF.
9. Shut down the engine following the proper procedures
specified in this manual and the applicable engine
manual.
10. Remove the keys.
11. Disconnect batteries, if machine will be inactive for over
24 hours.
12. Close and lock all windows, covers, and doors.
Unattended Crane
The configuration in which the crane should be left while
unattended shall be determined by a qualified, designated
individual familiar with the job site, configuration, conditions,
and limitations.
Before Making the Lift
• Set the outriggers as described in the section titled
Outrigger Setup, page 4-1.
• Program the RCL as specified in the RCL Operator’s
Manual which is located in the crane cab.
• Check all controls for proper operation. If any abnormal
operations are detected, the condition must be corrected
before continuing.
• Check the work area for electric power lines.
LOAD CHART
Your unit is designed to provide satisfactory service if it is not
loaded in excess of the maximum rated loads specified in the
load chart. Overloading can create safety hazards, cause
structural damage, and shorten the service life of the crane.
You must understand how to use the load charts located in
the crane cab. Make sure the load, the working area, and the
crane configuration are within the load limit specified in the
load chart.
NOTE: Load handling devices (hook blocks and slings) are
considered part of the load.
Using the Load Chart
The load chart is stored in a pocket in the crane cab. The
load chart contains lifting capacities of the crane in all
allowable lifting configurations.
The following list is a definition of terms needed when using
the load chart.
• Load Radius - The horizontal distance from the
centerline of rotation, before loading, to the center of the
WARNING
Tipping Hazard!
Never park the crane near holes, or on rocky or extremely
soft surfaces. This may cause the crane to overturn.
Failure to comply with these instructions may cause death
or serious injury.
CAUTION
To avoid possible engine fault codes and undesirable
operation, ensure the keyswitch has been off 2 minutes
before disconnecting batteries.
WARNING
Tipping Hazard!
Changing weather conditions including but not limited to:
wind, ice accumulation, precipitation, flooding, lightning,
etc. should be considered when determining the location
and configuration of a crane when it is to be left
unattended.
Failure to comply with these instructions may cause death
or serious injury.
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