National Crane Published 08/16/19 Control # 112-05 3-11
500E2 SERVICE MANUAL ELECTRIC SYSTEM
Installation
1. Install the crane on the truck by following the procedures
in the Installation Section of this manual.
2. The Electrical and Hydraulic Schematics show the
typical connections of the remote control system.
a. The Pump pressure line is connected to the
pressure port of the solenoid valve.
b. Install all electrical components and wires using the
parts pages and electric schematic as reference for
this installation. This machine is wired at the factory
for a 12 VDC, negative ground electrical system.
When used on other than 12 VDC systems, a
suitable 12 VDC source must be provided to power
the remote control. This remote control is not
intended for use with positive ground systems.
c. Mount relay assembly in engine compartment in a
convenient location and connect the appropriate
wires to the terminal block as shown in wiring
schematic. Only install remote start relay on a
chassis equipped with a switch that prevents the
engine from starting while the transmission is in
gear.
d. Adjust throttle actuator so it advances engine speed
to approximately 80% maximum manual operating
speed.
RADIO REMOTE CONTROLS
Safety
The radio remote control system offers an excellent solution
to safety, speed and ease of use, less downtime, and overall
maneuverability. Like any device, there are precautions and
common sense that work hand in hand to assure safe and
reliable operations.
Never allow any operation until the operator has read all
instructions and has become completely familiar with the
total system. Should anything happen unexplained,
unpredicted, or incorrect operation, immediately shut down
the complete system and investigate! This includes shutting
down all electronics, hydraulics, power take-offs, and
engines. Never resume operation until the problem has been
corrected!
Before attempting to start truck with remote control make
sure the drive train is in neutral.
When not using the remote control, disconnect power to the
remote control system with the selector switch installed in the
truck cab. This will prevent inadvertent operation of the crane
if the hand control is operated. Protect and monitor the hand
control unit to prevent damage and unplanned operation.
Always turn the truck ignition off and start the unit using the
remote hand control. This will allow the truck engine to be
turned off with the remote hand control. If the truck ignition is
on, the stop and emergency stop functions will not function.
Operation
For operation instructions, see the Operator Manual.
Service and Maintenance
A premium quality 9 volt alkaline non-rechargeable battery is
recommended. These batteries have a current rating of 600
milli-amps. When transmitting, current draw is 25 milli-amps.
Most of the current draw when transmitting is used by the
radio frequency transmitting function. The current draw for
the rest of the electronics in the transmitter is in the micro-
amp range. For instance, when the transmitter power switch
is on and the unit is not being used, the current draw is less
than one milli-amp. This means that leaving the power switch
in the ON position over night will not necessarily mean that
the 9 volt battery will be dead. The system requires a battery
that has a minimum voltage of 7.2 volts for satisfactory
operation. Rechargeable batteries are not recommended
because of their poor charge memory. Their ability to take a
charge tends to degrade over time.
To install the 9 volt battery, remove the battery cover on the
rear of the transmitter. Removal of the battery cover is easily
achieved by releasing the latch clip. Care should be taken
not to use excessive force to prevent damage to the cover.
Insert the battery making sure the polarity of the terminals
are correct.
Transmitter
As with any electronic device, care should be taken not to
subject the transmitter to excessive abuse. The radio
transmitter is a very rugged instrument and will withstand
normal use. The transmitter housing is made of a durable
material and will serve many years of use. The toggle
DANGER
Starting truck engine with drive train engaged will cause
unexpected movement of the truck resulting in death or
serious injury.
Do not install remote start relay on any chassis that can
be started while transmission is in gear.
Before a remote start relay can be installed, the chassis
must be equipped with a switch that prevents the engine
from starting while the transmission is in gear.
DANGER
Starting truck engine with drive train engaged will cause
death or serious injury.
Do not start truck engine unless drive train is in neutral.
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