Stellar 4500 Manual
10-1
Chapter 10 - Troubleshooting
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.
Problem: Crane will not operate.
Solutions:
• Make sure that the parking brake is engaged.
• Make sure that the PTO is engaged.
• 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 transmitter batteries are
fully charged. (Rechargeable batteries are
good for 11 months or 200 charges)
• Make sure that the hydraulic pump is
operating at its rated flow or GPMs. Check
the flow by using the flow meter to determine
the GPMs. It is possible that the hydraulic
pump is getting weak. If this is suspected,
contact Stellar Customer Service.
Problem: Crane will operate manually but
will not operate electrically.
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 from the
valve bank coil solenoid or to 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. Check the coil
for polarity, if coil does not magnetize,
replace the coil. If the coil is functioning,
remove stem valve, thoroughly clean,
lubricate, and reinstall valve. Do not over
tighten. If the valve will not close, simply
replace it.
Problem: Crane only operates at full speed.
Solutions:
• Check to see if there is 12V power constantly
going to the proportional valve. If 12 volts
are showing up at the proportional valve
without pulling on the transmitter trigger, the
handle/trigger assembly may be defective. If
8 volts are showing at the proportional valve,
it is possible that the valve is stuck open and
will not close. Remove the valve, clean it
thoroughly and reinstall. Do not over tighten.
If the problem persists, replace the
proportional valve.
• Check to see if the manual override on the
proportional valve is turned out. Turn the
manual override on the flow valve in.
Continued...
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