NTC55 OPERATOR MANUAL CONTROLS AND OPERATING PROCEDURES
National Crane Published 9-26-2018 Control # 646-02 3-3
• Ignition State = 2 (Crane ignition switch active)
To transition between Ignition State = 0 to Ignition State = 2,
the crane cab key switch should be turned to the ignition
position. In order to transition from Crane Ignition to Truck
Ignition, the crane cab key switch must first be turned OFF
and then the truck key switch can be turned to ignition. Both
switches must be OFF first before changing between states
1 and 2.
Control States
Much like the Ignition States, Crane Control States allow for
the crane to be operated in different ways depending on the
desired function. There are several Crane Control States, but
the main states are listed below:
• Control State = 5 (Control OFF)
• Control State = 0 (Lower Control)
• Control State = 1 (Crane Cab Control)
• Control State = 3 (Radio Remote Control)
When the Crane key switch is turned ON and the truck
engine is started, the crane is in Control State = 0. In this
state, the outriggers can be operated using the ground level
panels on either side of the crane and the hoists and single
front outrigger (optional).
The cab HVAC is functional also to allow the machine to be
heated and cooled while not using the crane functions.
To transition between Control State = 0 to Control State = 1,
the crane power switch must be ON, the armrests must be in
the down position, and the operator must be sitting on the
cab seat to activate the safety switch. In this Control State 1,
the lower outrigger stations and the standard remote control
are inactive.
To use the optional crane remote controller (if equipped), the
crane power switch and radio remote switch must both be
OFF and the crane cab ignition switch must be ON. To
enable remote control operation, turn on the remote power
switch. Refer to Crane Remote Control (optional), page 3-29
for more information on the crane remote controller
operation. Similar to the Ignition States, both crane and
remote power switches must be OFF to switch between
states.
JUMP STARTING THE CRANE
Do not attempt to jump start the crane.
All crane models, particularly those produced since 2000,
have multiple computer systems (crane control, RCL, engine
& transmission control) that are highly susceptible to voltage/
amperage surges in the electrical system.
The batteries should be completely disconnected from the
crane electrical system and charged using a battery charger
of appropriate voltage level or replace the batteries with fully
charged batteries.
Charging
When charging the batteries, do not turn on the battery
charger until the charging leads have been connected to the
battery(s). Also, if the battery(s) are found to be frozen, do
not attempt to charge them. Remove the battery(s) from the
crane, allow them to thaw, and then charge the battery(s) to
full capacity.
“Slow charging” is preferred to “fast charging”. Fast charging
saves time but risks overheating the battery(s). Slow
charging at six (6) amps or less develops less heat inside the
battery and breaks up the sulfate on the battery plates more
efficiently to bring the battery up to full charge. The use of a
“smart charger” that automatically adjusts the charging
amperage rate should be used.
TRUCK CAB CONTROLS
The truck cab controls described here are those controls that
are used in conjunction with the crane controls.
Truck Cab Ignition Switch
Truck cab ignition switch must be OFF in order for crane cab
ignition switch to be operable.
Power Take Off (PTO)
Manual Shift Control
The PTO is engaged when the knob on the dash or floor is
pulled out and disengaged when the knob is pushed in. The
truck gear shift lever must be in neutral and the clutch
depressed whenever the knob is moved.
CAUTION
It is strongly recommended that the batteries not be
“jumped” with a different vehicle, portable power pack,
etc. The surge of power from these sources can
irreparably damage the various electronic controls and
computer systems. Jump starting the crane batteries with
a different vehicle while the engine is running can damage
the donor vehicle electronics as well if done improperly.
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