Page 46 | Stellar
®
Heavy-Duty Telescopic Crane Owner’s Manual
Problem: Crane will operate manually but will not operate by radio remote.
Solutions:
• Make sure that there is 12V 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 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 do
not move while operating the crane.
• Determine the function that is operating on its own. Check to see if there is power going to
the solenoid valve from a function that should not be operating. If voltage is present at the
solenoid valve without operating the function, the toggle switch has failed and is stuck in the
“on” function. If no voltage is present, the solenoid valve may be partially open. Remove the
stem valve, thoroughly clean, lubricate, and reinstall the valve. Do not over tighten. If valve will
not close, simply replace it.
Problem: Winch brake will not hold.
Solutions:
• Check to see if the back pressure on the return line of the winch is greater than 50 psi. Try
operating a function other than the winch. Operate the function both ways and then stop.
Now operate the winch. If the brake still does not hold, contact Customer Service at Stellar.
Courtesy of CraneMarket.com
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