This chapter will list a number of potential problems that
may occur while operating the crane. Most problems are
easily solved using the solutions portion of this chapter. If
problems persist, please contact Customer Service at Stellar
Industries 1-800-321-3741.
Prior to troubleshooting:
Always make sure the emergency brake is engaged.
To determine if there is an electrical or hydraulic problem, first try to operate the crane
manually. This is done by pushing the manual override button, then operating the individual
solenoid valves located along the valve bank (See the manual operation procedure page at
the end of this chapter). If the crane operates, there will be an electrical problem to trace. If
the crane does not operate using the manual overrides, there is a problem within the hydraulic
circuit.
Problem: Crane will not operate.
Solutions:
• Make sure that the parking brake is engaged.
• Make sure that there is electrical power going to the radio receiver. If there is no power
going to the receiver, trace back to the power source and check for a blown fuse or loose
ground connection. Refer to radio remote troubleshooting guide at the end of this chapter.
• Make sure that the transmitter batteries are fully charged.
Problem: Crane will operate manually but will not operate by radio remote.
Solutions:
• Make sure that there is electrical power going to the radio receiver. If there is no power
going to the receiver, trace back to the power source and check for a blown fuse or loose
ground connection. Refer to radio remote troubleshooting guide at the end of this chapter.
• Make sure that the parking brake is engaged.
• Make sure that the parking brake switch is working properly. Check the parking brake switch
by performing a continuity test. If the switch is defective, simply replace it.
Problem: Not all crane functions operate using the radio remote transmitter or crane operates
intermittently.
Solutions:
• Make sure that the toggle switch on the transmitter is working properly. If the switch is
defective, simply replace it.
• Make sure that there is power going to the valve bank coil solenoid of the function that will
not operate. If no power is going to the coil solenoid, check wiring connections on wire
harness plug connector for broken wires, loose connection or poor crimp. If power is going
to the solenoid valve, it may not be opening to allow hydraulic oil to the function that is not
operating. Remove stem valve, thoroughly clean, lubricate, and reinstall valve. Do not over
tighten. If the valve will not close, simply replace it.
Problem: Two functions operate at the same time while only toggling one function.
Solutions:
• Make sure that the solenoid valves are all latched in the center position to ensure that they
Troubleshooting
Chapter 3 - Troubleshooting
MODEL NO.
SERIAL NO.
DATE
MADE IN THE U.S.A. BY STELLAR INDUSTRIES, INC.
PN C5942
®
PATENT INFORMATION
http://www.stellarindustries.com/ip
The serial tag will be located on the the lower
mast of the crane.
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