Stellar
®
Large OTR Service Crane Owner’s Manual | Page 19
Problem Possible Cause Possible Solution
Crane will not
operate.
PTO is not engaged. Engage PTO. If PTO won't engage, refer to PTO
manufacturer's manual for details.
Crane is not receiving proper
hydraulic ow
Check hydraulic reservoir uid level.
Ensure PTO is engaged.
Ensure Panic Bar E-Stop is not engaged.
Verify selector switch is in crane mode and not
stabilizer/off mode.
Ensure dump valve is receiving proper electrical
signal and operating properly.
Verify hydraulic pump is producing proper ow.
Ensure hydraulic oil is at the proper operating
temperature.
Verify engine speed control has been
activated.
Crane is not receiving proper
hydraulic pressure
Check hydraulic reservoir uid level.
Ensure PTO is engaged.
Ensure Panic Bar E-Stop is not engaged.
Verify selector switch is in crane mode and not
stabilizer/off mode.
Ensure dump valve is receiving proper electrical
signal and operating properly.
Verify hydraulic pump is producing proper
pressure.
Crane does not have proper
electrical power.
Check fuse and holder.
Verify good ground.
Verify good power supply.
Verify proper voltage.
Verify electrical wiring/connection integrity.
Ensure manual/remote switch is working
properly.
Verify engine speed control has been
activated.
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